PHYSICAL SCIENCE PRELIM TO FINALS., Exams of Science education

Download PHYSICAL SCIENCE PRELIM TO FINALS. and more Exams Science education in PDF only on Docsity! BL-NSCI-121-LEC-1922S PHYSICAL SCIENCE /FOR ANTIPS Which of the following did not occur after the Big Bang? Select one: a. the universe is compacted into a very small volume b. the universe was unimaginably hot and dense c. the early universe was not smoothly distributed across space d. the universe became less dense and began to cool Question 2 Correct Mark 1.00 out of 1.00 Flag question Question text What is the name given to all matter, energy, and space? Select one: a. Solar system b. Universe c. Galaxy d. Local group Question 3 Correct Mark 1.00 out of 1.00 Flag question Question text The "plum pudding model" of the atom is associated with Select one: a. Bohr. b. Thomson. c. Dalton. d. Rutherford. Question 4 Correct Mark 1.00 out of 1.00 Flag question Question text The Sun is a(n) Select one: a. galaxy. b. cluster. c. star. d. planet. Question 5 Correct Question 9 Correct Mark 1.00 out of 1.00 Flag question Question text In 1661, who developed a definition of element that made the concept subject to laboratory investigation? Select one: a. Davy b. Berzelius c. Lavoisier d. Boyle Question 10 Correct Mark 1.00 out of 1.00 Flag question Question text When fast electrons strike a metal target, what are produced? Select one: a. X-rays b. Radio waves c. Microwaves d. Gamma rays The temperature of the Sun's interior is estimated to be about how many kelvins? Select one: a. 60,000 b. 15 million c. 5 billion d. 1500 Question 2 Correct Mark 1.00 out of 1.00 Flag question Question text The Sun's photosphere is, by mass, about 75% Select one: a. oxygen. b. carbon. c. helium. d. hydrogen. Question 3 Correct Mark 1.00 out of 1.00 Flag question Question text If all samples of a material have identical properties and composition, it is Select one: a. an element. b. a homogeneous mixture. c. a compound. d. an element or compound. Question 4 Incorrect Mark 0.00 out of 1.00 Flag question Question text The Sun's photosphere is, by mass, about 25% Select one: a. oxygen. b. helium. c. hydrogen. d. carbon. Flag question Question text The second most abundant element in the Earth's atmosphere is Select one: a. oxygen. b. carbon dioxide. c. nitrogen. d. argon. Question 10 Correct Mark 1.00 out of 1.00 Flag question Question text What was the nationality of the first persons who we know speculated about “elements”? Select one: a. Roman b. Greek c. Egyptian d. Chinese According to the Big Bang theory, when did the universe begin? Select one: a. 12.8 billion years ago b. 13 billion years ago c. 15.2 billion years ago d. 13.7 billion years ago Question 2 Correct Mark 1.00 out of 1.00 Flag question Question text The two types of bright nebulae are emission nebulae and _______________ nebulae. Select one: a. absorption b. photonic c. refraction d. reflection Question 3 Incorrect Mark 0.00 out of 1.00 Flag question Question text The Sun's energy is generated from the fusion of Select one: a. hydrogen nuclei to form helium nuclei. b. helium nuclei to form carbon nuclei. c. uranium to form lead, Pb. d. carbon nuclei to form magnesium nuclei. Question 4 Correct Mark 1.00 out of 1.00 Flag question Question text Who discovered the nucleus of the atom in 1911? Select one: a. Dalton b. Thomson c. Rutherford d. Bohr Question 5 Correct Mark 1.00 out of 1.00 d. There are atoms gained/lost/changed in identity during a chemical reaction. e. Chemical combination is simply the bonding of a definite number of atoms to make one molecule of the compound Question 9 Correct Mark 1.00 out of 1.00 Flag question Question text The planetary model of the atom is associated with Select one: a. Thomson. b. Rutherford. c. Dalton. d. Bohr. Question 10 Correct Mark 1.00 out of 1.00 Flag question Question text The number of _______________ on the Sun varies over an 11-year cycle. Select one: a. sunspots b. rays c. canals d. valleys The various isotopes of an element all have Select one: a. the same total number of neutrons and protons. b. the same number of neutrons but different numbers of protons. c. the same number of protons but different numbers of neutrons. d. the same number of neutrons and the same number of protons. Question 2 Correct Mark 1.00 out of 1.00 Flag question Question text Who discovered the electron in 1897? Select one: a. Thomson b. Bohr c. Dalton d. Rutherford Question 3 Correct Mark 1.00 out of 1.00 Flag question Question text Who discovered the electron in 1897? Select one: a. James Chadwick b. J. J. Thomson c. Ernest Rutherford d. Niels Bohr Question 4 Correct Mark 1.00 out of 1.00 Flag question Question text Who discovered the atomic nucleus in 1911? Select one: a. Ernest Rutherford b. Niels Bohr c. Marie and Pierre Curie b. groups. c. series. d. families. Question 9 Correct Mark 1.00 out of 1.00 Flag question Question text About 75% of the mass of the visible universe is composed of which element? Select one: a. Helium b. Iron c. Hydrogen d. Silicon Question 10 Correct Mark 1.00 out of 1.00 Flag question Question text The "billiard ball model" of the atom is associated with Select one: a. Rutherford. b. Bohr. c. Dalton. d. Thomson. The ancient Greek who is known for championing the concept of atom was named ______________. Select one: a. Democritus b. Zeus c. Socrates d. Plato Question 2 Correct Mark 1.00 out of 1.00 Flag question Question text In 1869, a major event in the history of chemistry occurred; it was the Select one: a. discovery of the law of definite proportions. b. discovery of the octet rule. c. development of the periodic table. d. discovery of the law of conservation of mass. Question 3 Correct Mark 1.00 out of 1.00 Flag question Question text What is the temperature in kelvins of the visible surface of the Sun? Select one: a. 6000 K b. 6 billion K c. 600 K d. 6 million K Question 4 Correct Mark 1.00 out of 1.00 Flag question Question text The nuclear model of the atom is associated with Select one: a. Dalton. b. Rutherford. Select one: a. iron and nickel b. oxygen and aluminum c. silicon and oxygen. d. aluminum and silicon Question 9 Correct Mark 1.00 out of 1.00 Flag question Question text The various isotopes of an element all have Select one: a. the same total number of neutrons and protons. b. the same number of neutrons but different numbers of protons. c. the same number of neutrons and the same number of protons. d. the same number of protons but different numbers of neutrons. Question 10 Correct Mark 1.00 out of 1.00 Flag question Question text True or False: The alchemists have been successful in changing lead to gold. Answer: If all samples of a material have identical properties and composition, it is Select one: a. a homogeneous mixture. b. a compound. c. an element. d. an element or compound. Question 2 Correct Mark 1.00 out of 1.00 Flag question Question text The ancient Greek who is known for championing the concept of atom was named ______________. Select one: a. Socrates b. Zeus c. Plato d. Democritus False Question 3 Correct Mark 1.00 out of 1.00 Flag question Question text Nearly 100% of mass of Earth's core is composed of the two elements Select one: a. iron and nickel b. oxygen and aluminum c. silicon and oxygen. d. aluminum and silicon Question 4 Correct Mark 1.00 out of 1.00 Flag question Question text Who discovered the electron in 1897? Select one: a. Bohr b. Rutherford c. Dalton b. Bohr. c. Thomson. d. Dalton. Question 9 Correct Mark 1.00 out of 1.00 Flag question Question text The number of _______________ on the Sun varies over an 11-year cycle. Select one: a. valleys b. canals c. sunspots d. rays Question 10 Incorrect Mark 0.00 out of 1.00 Flag question Question text The Bohr theory was developed to explain which of these phenomena? Select one: a. Quantum numbers b. The photoelectric effect c. X-rays d. Line spectra Wilhelm Roentgen discovered Select one: a. gamma rays. b. X-rays. c. microwaves. d. radio waves. Question 2 Correct Mark 1.00 out of 1.00 Flag question Question text What was the nationality of the first persons who we know speculated about “elements”? Select one: a. Egyptian b. Greek c. Roman d. Chinese Question 3 Correct Mark 1.00 out of 1.00 Flag question Question text The two types of bright nebulae are emission nebulae and _______________ nebulae. Select one: a. refraction b. photonic c. reflection d. absorption Question 4 Correct Mark 1.00 out of 1.00 Flag question Question text The periodic table is most easily understood in terms of the ______________ configurations of the elements. Select one: a. periodic Select one: a. was so abundant. b. could be obtained in extremely high purity. c. had the simplest atom. d. was inexpensive. Question 9 Correct Mark 1.00 out of 1.00 Flag question Question text About 75% of the mass of the visible universe is composed of which element? Select one: a. Hydrogen b. Helium c. Iron d. Silicon Question 10 Correct Mark 1.00 out of 1.00 Flag question Question text When the absolute magnitudes, or brightnesses, of stars are plotted against their surface temperatures or colors, we obtain a(n) Select one: a. Hertzsprung-Russell (or H-R) diagram. b. random pattern. c. straight line. d. none of the choices The greater the mass of a star, the _______________ it moves through its life cycle. Select one: a. faster b. Neither of these; mass has no effect on the life cycle of a star. c. slower Question 2 Correct Mark 1.00 out of 1.00 Flag question Question text Sodium is an example of Select one: a. A solution b. An alloy c. An element d. A compound Question 3 Correct Mark 1.00 out of 1.00 Flag question Question text Who discovered the nucleus of the atom in 1911? Select one: a. Bohr b. Thomson c. Rutherford d. Dalton Question 4 Correct Mark 1.00 out of 1.00 Flag question Question text Which of the following did not occur after the Big Bang? Select one: a. the universe is compacted into a very small volume Select one: a. star. b. planet. c. galaxy. d. cluster. Question 9 Correct Mark 1.00 out of 1.00 Flag question Question text The temperature of the Sun's interior is estimated to be about how many kelvins? Select one: a. 60,000 b. 5 billion c. 1500 d. 15 million Question 10 Correct Mark 1.00 out of 1.00 Flag question Question text In 1869, a major event in the history of chemistry occurred; it was the Select one: a. discovery of the octet rule. b. discovery of the law of conservation of mass. c. development of the periodic table. d. discovery of the law of definite proportions. energy is the energy needed to start a reaction. Question 2 Correct Mark 1.00 out of 1.00 Flag question Question text True or False: The catalyst brings the reactants together by permanently bonding with them. Answer: Question 3 Incorrect Mark 0.00 out of 1.00 Flag question Activat False Question text Answer is occurring when gas bubbles are released during the reaction. Question 4 Correct Mark 1.00 out of 1.00 Flag question Question text True or False: The rate of reaction is faster if the temperature of reactants is higher. Answer: Question 5 Incorrect Mark 0.00 out of 1.00 Flag question Question text True or False: Noble gases almost never react to other substances. Answer: Question 6 Correct Mark 1.00 out of 1.00 Flag question efferve True True Flag question Question text A Answer is a substance that increases the rate of a chemical reaction. Question 4 Incorrect Mark 0.00 out of 1.00 Flag question Question text True or False: Sodium can exist by itself. Answer: Question 5 Correct Mark 1.00 out of 1.00 Flag question Question text True or False: The catalyst is a reactant in the chemical reaction it speeds up. Answer: Question 6 Correct Mark 1.00 out of 1.00 catalys False False Flag question Question text True or False: Carbon in graphite can be described as hard as the carbon in diamond. Answer: Question 7 Correct Mark 1.00 out of 1.00 Flag question Question text Answer helps determine how an element might be used. Question 8 Correct Mark 1.00 out of 1.00 Flag question Question text True or False: Aluminum is a good conductor of heat. Answer: Question 9 Correct Mark 1.00 out of 1.00 False HARDN True Flag question Question text Answer refers to the ability of matter to burn. Question 10 Correct Mark 1.00 out of 1.00 Flag question Question text Answer is an enzyme found in the mouth and small intestine that hlps in the breakdown of starch to sugar. True or False: In determining the limiting reactant, mass quantities must be converted to moles. Answer: Question 2 Correct Mark 1.00 out of 1.00 Flag question Question text The solid that settles out of a liquid solution is called Answer . Flamma amylas True precipi Question 9 Correct Mark 1.00 out of 1.00 Flag question Question text True or False: Sodium reacts violently with water. Answer: Question 10 Correct Mark 1.00 out of 1.00 Flag question Question text True or False: Chemical reactions occur inside living things. Answer: True or False: In determining the limiting reactant, mass quantities must be converted to moles. Answer: Question 2 Correct Mark 1.00 out of 1.00 True True True Flag question Question text True or False: Chemical reactions occur inside living things. Answer: Question 3 Correct Mark 1.00 out of 1.00 Flag question Question text True or False: Lower activation energy = more reactant particles with enough energy to react causing the reaction to occur faster. Answer: Question 4 Correct Mark 1.00 out of 1.00 Flag question Question text True or False: Salt can conduct electricity in any form. Answer: Question 5 Correct True True False Mark 1.00 out of 1.00 Flag question Question text True or False: The catalyst brings the reactants together by permanently bonding with them. Answer: Question 6 Correct Mark 1.00 out of 1.00 Flag question Question text The solid that settles out of a liquid solution is called Answer . Question 7 Correct Mark 1.00 out of 1.00 Flag question Question text Answer energy is the energy needed to start a reaction. Question 8 Correct Mark 1.00 out of 1.00 False precipi activat Answer: Question 5 Correct Mark 1.00 out of 1.00 Flag question Question text True or False: Noble gases almost never react to other substances. Answer: Question 6 Correct Mark 1.00 out of 1.00 Flag question Question text Answer refers to the concentration of a substance. Question 7 Correct Mark 1.00 out of 1.00 Flag question Question text Answer is an enzyme found in the mouth and small intestine that hlps in the breakdown of starch to sugar. enzymes True Density amylas Question 8 Correct Mark 1.00 out of 1.00 Flag question Question text True or False: Aluminum is a good conductor of heat. Answer: Question 9 Correct Mark 1.00 out of 1.00 Flag question Question text True or False: Sodium reacts violently with water. Answer: Question 10 Correct Mark 1.00 out of 1.00 Flag question Question text True or False: Carbon in graphite can be described as hard as the carbon in diamond. True True Answer: is occurring when gas bubbles are released during the reaction. Question 2 Correct Mark 1.00 out of 1.00 Flag question Question text Answer refers to the ability of matter to burn. Question 3 Correct Mark 1.00 out of 1.00 Flag question Question text True or False: Density decreases as temperature increases. Answer: Question 4 Correct Mark 1.00 out of 1.00 Flag question False chemic Flamma False Question text Answer helps determine how an element might be used. True or False: Silver conducts electricity at minimal circumstances only. Answer: Question 2 Correct Mark 1.00 out of 1.00 Flag question Question text True or False: Carbon in graphite can be described as hard as the carbon in diamond. Answer: Question 3 Correct Mark 1.00 out of 1.00 Flag question Question text True or False: The rate of reaction is faster if the temperature of reactants is higher. Answer: Question 4 Correct Mark 1.00 out of 1.00 HARDN False False True Flag question Question text Catalysts in living things are called Answer: Question 5 Correct Mark 1.00 out of 1.00 Flag question Question text True or False: Platinum has very high density. Answer: Question 6 Correct Mark 1.00 out of 1.00 Flag question Question text Matter is Answer if it can be rolled and stretched to long and thin shapes. Question 7 Correct Mark 1.00 out of 1.00 enzymes True Ductile Flag question Question text True or False: The catalyst brings the reactants together by permanently bonding with them. Answer: Question 8 Correct Mark 1.00 out of 1.00 Flag question Question text True or False: Tools made from iron easily rust. Answer: Question 9 Correct Mark 1.00 out of 1.00 Flag question Question text True or False: In determining the limiting reactant, mass quantities must be converted to moles. Answer: False True True Question 7 Correct Mark 1.00 out of 1.00 Flag question Question text True or False: Chemical reactions occur inside living things. Answer: Question 8 Correct Mark 1.00 out of 1.00 Flag question Question text The solid that settles out of a liquid solution is called Answer . Question 9 Correct Mark 1.00 out of 1.00 Flag question Question text Answer energy is the energy needed to start a reaction. Question 10 Correct True precipi activat Mark 1.00 out of 1.00 Flag question Question text True or False: The catalyst is a reactant in the chemical reaction it speeds up. Answer: LONGQUIZ 2 ;PHYSICAL SCIENCE 29/30 c- 1.What do you call the solid formed when a liquid solution is allowed to stand still for a long amount of time. ans. Precipitate 2.What is the proper term for catalysts involved in biological processes? ans.Enzymes 3.What is the term for the energy responsible for the variations in the reaction rates of chemical processes? answer:activation energy 4.What property of a material describes the compactness of the arrangement of its molecules? ans.Density 5.Identify the kind of change wherein the product is the same as the reactants. ANWER:physical change 6.In which type of covalent bonding are the shared electrons shared congruently throughout the molecule? answer:nonpolar 7.What do you call the ability of a substance to chemically combine with other compounds? answer:Reactivity 8.Fill in the blank: The ______ property of a substance can be observed without changing the substance. answer:physical 9.What type of covalent compound is there a slight difference in the electric charge between the opposite sides of the molecule? answer:polar covalent compound 10.Identification: This factor in a reaction rate is a consequence of the kinetic energy of the reactant molecules? wrong answer ako dito. 11.What kind of chemical bond involves the sharing of electrons between two atoms? answer:covalent bond 12.What is the component of a chemical reaction that is present at its start? answer:reactant 13.Identification: Two different atoms may or may not have this type of covalent bonding. answer:polar covalent bonding 14._____ covalent bond does not have an equal sharing of electrons. answer.Polar 15.What kind of change results to the production of a material that is entirely different from the reactants? answer:chemical change 16.Identification: This is another term used to refer to covalent compounds. answer:molecular compound False 17.Identification: This refers to the speed of a chemical process. answer:reaction rate 18.Which atom is more positive than the other in a molecule of dihydrogen oxide? answer: hydrogen atom 19.Identification: These compounds are highly soluble in water. answer:ionic compounds 20.Identification: These properties can be detected using your senses. answer:Physical properties 21.What type of compound is formed by the sharing of electrons? answer:Covalent compound 22.covalent bonding exists between two identical atoms. answer: nonpolar 23.Identification: This is the force that exists between the molecules of a compound. answer: Intermolecular force 24.What is the term for the property that makes it capable of being hammered into thin sheets? answer:malleability 25.In a water molecule, which atom is more frequented by the shared electrons? answer:oxygen 26.Identify the substance that hastens chemical reactions? answer:catalyst 27. In a ______ type of covalent bonding, there is equal sharing of electrons between the atoms. answer: nonpolar 28.What type of covalent bonding is characterized by the incongruent sharing of electrons between the atoms? answer:polar 29.Which reaction rate factor is due to the amount of reacting substances? answer: concentration 30.Identification: This compound is formed by a cation and an anion. answer:ionic compound Short Quiz 8:PHYSC c-Joshua Ardeza 1. Also known as the revolution of the Earth around the sun Answer: ANNUAL MOTION 2. Ancient constellations related to Earth’s annual motion Answer: ZODIAC 3. Center in Ptolemaic system of the universe Answer: EARTH 4. Center of the universe in the Copernican system Answer: SUN 5. Earth’s movement that results to the observation of diurnal motion Answer: ROTATION 6. Event when the sun crosses the Celestial Equator Answer: EQUINOX 7. Line on Earth that is parallel to apparent daily paths Answer: CELESTIAL EQUATOR 8. Main factor in the precession of equinoxes Answer: GRAVITY 9. More common term for the annual motion of the Earth Answer: REVOLUTION 10. Type of observable motion associated with heavenly bodies Answer: DIURNAL MOTION Learning Activity 8 (Physics) Slow and continuous change in the orientation of an astronomical body’s rotational axis Answer: Axial precession Periodic observable motion that results from the Earth’s motion on its axis Answer: diurnal motion Center of the universe in Ptolemy’s model Answer: Earth 8. Planet property whose square is directly proportional to the cube of the semi-major axis of its orbit Answer: ORBITAL PERIOD 9. Shape of the orbit based on Kepler’s third law Answer: ELLIPSE 10. Star blamed by Greeks for the intensity of summer Answer: SIRIUS Learning Activity 10:PHYSC c-Joshua Ardeza 1. Constant in the motion of a falling body in vacuum Answer: ACCELERATION 2. Description of the change in the rate of movement of a body Answer: ACCELERATION 3. Indirect force resulting from the application of a force Answer: REACTION 4. Necessary component of motion according to Aristotle Answer: FORCE 5. Property of a body that affects its state of motion Answer: INERTIA Short Quiz 10:PHYSC Aside from changing the state of motion of a body, this is also an effect of applying an unbalanced force to the body. Answer: ACCELERATION Which can be easily affected by an unbalanced force: one cube of ice or one sack of rice? Answer: ONE SACK OF RICE This law implies the importance of balanced forces and what unbalanced forces are. Answer: LAW OF INTERACTION Which will accelerate more when the same unbalanced force is applied: pencil or cabinet? Answer: CABINET This law of motion relates the rate of change in the movement of a body and the unbalanced force that it experiences. Answer: LAW OF ACCELERATION Which law of motion states that a body will not change its current state of motion unless an unbalanced force acts upon it? Answer: LAW OF INERTIA If you push the wall with an amount of force, you supply the action force. What is the source of the reaction force? Answer: WALL What factor of a body that is at rest prevents it from moving? Answer: INERTIA What is the only factor that is constant for bodies falling in a vacuum? Answer: ACCELERATION Which of these has a greater inertia: fly or cat? Answer: cats Learning Activity 11:PHYSC c-Joshua Ardeza 1. Constant in a body as long as no net force acts upon it Answer: VELOCITY 2. Decreases as acceleration increases in Newton’s law of acceleration Answer: MASS 3. Force involved in Newton’s Law of Universal Gravitation Answer: GRAVITATIONAL FORCE 4. Statement based on repeated experimental observations Answer: LAW 5. Statement taken to be true since what it proposes is already evident Answer: AXIOM Short Quiz 11:PHYSC c-Joshua Ardeza 1. According to Galileo, this quantity is not needed to keep a body in motion under ideal conditions. Answer: FORCE 2. Describe the total amount of energy of a body before it falls from a height and as it hits the ground. Answer: EQUAL 3. In the law of acceleration, which quantity decreases as the acceleration decreases? Answer: FORCE 4. This is also known as the “inertia in motion” of a body. Answer: MOMENTUM 5. This kind of statement is considered true since it has been based on a series of observations. Answer: LAW 6. What do you call a statement that is taken as true without scientific evidence? Answer: AXIOM 7. What happens to energy as it is used up by different systems? Answer: TRANSFORMED 8. What happens to the magnitude of the gravitational force as the bodies become more massive? Answer: INCREASES 9. What happens to the magnitude of the gravitational force as the distance between two bodies increase? Answer: DECREASES 10. What term do you use to refer to the amount of material contained by a body? Answer: MASS Short Quiz 12:PHYSC c-Joshua Ardeza 1. Consider the formula for momentum. What quantity increases with the velocity of a body?: Momentum; Velocity; Inelastic; Force; Mass; Elastic; Energy Answer: Momentum 2. If a body has no momentum, what else does it not have?: Elastic; Inelastic; Force; Momentum; Mass; Velocity; Energy Answer: Velocity 3. In the formula for momentum, this quantity decreases as the body moves slower.: Elastic; Mass; Energy; Momentum; Force; Velocity; Inelastic Answer: Mass 4. In this type of collision, this factor is not necessarily conserved.: Energy; Elastic; Velocity; Force; Inelastic; Mass; Momentum Answer: Energy 5. This quantity describes how difficult it is to stop a moving body.: Inelastic; Velocity; Momentum; Force; Energy; Mass; Elastic Answer: Momentum 6. This quantity enables bodies to move so that they would collide.: Mass; Energy; Elastic; Force; Velocity; Inelastic; Momentum Answer: Energy 7. What SI quantity is directly related and directly proportional to the mass of a body?: Inelastic; Momentum; Velocity; Elastic; Energy; Force; Mass Answer: Momentum 8. What type of collision is involved between two bodies that show a spark of light after colliding: Momentum; Force; Inelastic; Mass; Elastic; Energy; Velocity Answer: Inelastic 9. Which type of collision involves the constant sum of total kinetic energy before and after the collision?: Momentum; Velocity; Mass; Elastic; Force; Energy; Inelastic Answer: Elastic 10. Which will stop first when these two bodies collide: truck or bicycle? Answer: BICYCLE Learning Activity 12:PHYSC c-Joshua Ardeza 1. Collision that involves the conversion of energy into other forms outside the colliding bodies Answer: INELASTIC 2. Factor responsible for the movement of the bodies that are about to collide Answer: ENERGY 3. Not necessarily conserved between colliding bodies Answer: ENERGY 4. Quantity conserved in any collision Answer: MOMENTUM 5. Type of collision wherein the total kinetic energy is constant before and after the collision Answer: ELASTIC Short Quiz 13:PHYSC c-Joshua Ardeza 1. Consider the wave equation. Which quantity increases with the frequency of the wave?: Absorption; Latitudinal; Index of Refraction; Longitudinal; Wavelength; Refraction; Electron; Photon; Transverse; Energy; Mirror; Speed; Dispersion Answer: Speed 2. In light, this is what the photons carry enabling them to move.: Wavelength; Energy; Mirror; Photon; Longitudinal; Dispersion; Electron; Speed; Transverse; Index of Refraction; Absorption; Refraction; Latitudinal Answer: Energy 3. In the wave equation, this quantity is inversely proportional to the frequency of the wave.: Absorption; Mirror; Electron; Latitudinal; Longitudinal; Energy; Speed; Photon; Refraction; Index of Refraction; Dispersion; Wavelength; Transverse Answer: Wavelength 4. Name the component of light that travels in straight lines.: Index of Refraction; Longitudinal; Transverse; Absorption; Latitudinal; Energy; Electron; Refraction; Mirror; Photon; Dispersion; Wavelength; Speed Answer: Photon 5. This constant determines how much light will bend as it enters a different medium.: Electron; Refraction; Photon; Latitudinal; Mirror; Speed; Index of Refraction; Transverse; Absorption; Longitudinal; Dispersion; Wavelength; Energy Answer: Index of Refraction - True When reading the forward power on a wattmeter, what does two right-facing arrow heads mean? Select one: - Power exceeds 120 percent of the range What are the two main types of photodetectors? (separate your answers with the word "and") Answer: -Positive intrinsic photodiode AND negative intrinsic photodiode In November 1886, Heinrich Hertz became the first person to transmit and receive controlled radio waves. Select one: -True If the interference can be eliminated by disconnecting the receiving antenna, the source of the disturbance is most likely Select one: - External to the radio What initial nuclear radiation components generate electromagnetic pulses? (separate your answers with the word "and") Answer: -Gamma rays AND neutrons Who discovered radio waves? Answer: -Heinrich Hertz What pattern simulator section of the bit error rate test set accepts a 48-bit parallel word and generates a serial pattern? Select one: -48-bit transmitter only Hertz started generating radio waves using a piece of electrical equipment called an induction coil. Select one: -True Short Quiz 16:PHYSC c-Joshua Ardeza 1. As measured in any inertial frame of reference, light is always propagated in empty space with a definite velocity that is independent of the state of motion of the emitting body.: False; True Answer: True 2. Maxwell’s equations are not consistent with Galilean relativity unless one postulates the existence of a physical aether.: True; False Answer: True 3. The laws of physics are the same in all inertia frames of reference.: True; False Answer: True 4. The postulates of special relativity can be expressed very succinctly using the mathematical language of pseudo-Riemmannian manifolds: True; False Answer: True 5. What is the correct expression for the amplitude of a vibrating mass? Amplitude is the: Maximum velocity of the mass during vibration; Maximum displacement of the mass from the rest position Answer: Maximum displacement of the mass from the rest position 6. Which of the following is not a term associated with periodic waves?: Frequency; How much space is occupied Answer: How much space is occupied 7. Which of the following sound wave can be heard by the human ear?: Ultrasonic sound waves; Sound waves with frequencies between 20 hz and 20,000 hz Answer: Sound waves with frequencies between 20 hz and 20,000 hz 8. It combines special relativity with the equivalence principle. Answer: General relativity 9. It is the succession of methods by which astronomers determine the distances to celestial objects. Answer: Cosmic distance ladder 10. Known as the “dwarf planet” Answer: Pluto L.A 16:PHYSC Vibrations Select one: - Can sometimes be sensed Special relativity is a theory. Select one: - True States that the net force acting on a body is equal to that body’s (inertia ) mass multiplied by its acceleration. Select one: -Newton's Second Law of Motion According to this law there is a universality of free fall. The trajectory of a test body in free fall depends only on its position and initial speed. Answer: -Newton's Law of Gravity Which of the following must be satisfied for a vibration to be simple harmonic motion? The restoring force of the vibrating object is Select one: - -Opposite to and proportional to a displacement It is the passage of electromagnetic radiation through a medium. Select one: Answer: Transmission This Kepler's law states that the line joining the planet to the sun sweeps out equal areas in equal times as it moves along its orbit. Select one: Answer: Second law Which of Newton's laws states that an object either remains at rest or continuous to move at a constant velocity, unless acted upon by a force? Select one: Answer: First law Galileo looked at the Sun and found out that it had spots. Answer: True Mercury and Venus are never more than 200 and 450, respectively, from the Sun. Answer: False The Aristotelian view of the world made the certain basic assumption that the Earth is a sphere, fixed, and unmoving at the center of the universe. Answer: False Identification: Identify the substance that hastens chemical reactions? Catalyst Identification: This refers to the speed of a chemical process. reaction rate True or False: In determining the limiting reactant, mass quantities must be converted to moles. True What is the component of a chemical reaction that is present at its start? reactant True or False: Chromium is one of the soft elements. false Identification: Two different atoms may or may not have this type of covalent bonding. polar covalent bonding True or False: Density decreases as temperature increases. True type of covalent bonding, there is equal sharing of electrons between the atoms. nonpolar What type of compound is formed by the sharing of electrons? Covalent compound Identification: Reaction rate factor that is due to the movement of the molecules of the reactants. Concentration True or False: Platinum has very high density. true helps determine how an element might be used. HARDNESS True or False: Aluminum is a good conductor of heat. TRUE covalent bonding exists between two identical atoms. Question text The planetary model of the atom is associated with Select one: a. Thomson. b. Rutherford. c. Bohr. d. Dalton. Question 5 Not yet answered Marked out of 1.00 Flag question Question text Who discovered the electron in 1897? Select one: a. Rutherford b. Thomson c. Bohr d. Dalton Question 6 Not yet answered Marked out of 1.00 Flag question Question text True or False: The alchemists have been successful in changing lead to gold. Answer: Question 7 Not yet answered Marked out of 1.00 false Flag question Question text Nearly 100% of mass of Earth's core is composed of the two elements Select one: a. oxygen and aluminum b. iron and nickel c. silicon and oxygen. d. aluminum and silicon Question 8 Not yet answered Marked out of 1.00 Flag question Question text The second most abundant element in the Earth's atmosphere is Select one: a. carbon dioxide. b. argon. c. nitrogen. d. oxygen. Question 9 Not yet answered Marked out of 1.00 Flag question Question text The apparent brightness of stars is ranked according to magnitude. The brightest stars were originally ranked as what magnitude? Select one: a. Zero b. None of the choices c. First d. Sixth Question 10 Not yet answered Marked out of 1.00 Flag question Question text The various isotopes of an element all have Select one: a. the same number of protons but different numbers of neutrons. b. the same number of neutrons but different numbers of protons. c. the same total number of neutrons and protons. d. the same number of neutrons and the same number of protons. Question 1 Not yet answered Marked out of 1.00 Flag question Question text True or False: The rate of reaction is faster if the temperature of reactants is higher. Answer: Question 2 Not yet answered Marked out of 1.00 true Flag question Question text True or False: Sodium can exist by itself. Answer: Question 10 Not yet answered Marked out of 1.00 Flag question Question text Answer refers to the ability of matter to burn. Question 1 Not yet answered Marked out of 1.00 Flag question Question text Where are stars born? Answer: Question 2 Not yet answered Marked out of 1.00 Flag question Question text The most modern definition of element is true flamma Orion Nebula Select one: a. a substance that cannot be further separated by chemical methods. b. a substance in which all the atoms have the same number of protons. c. the simplest form of matter. d. a substance that contains no neutrons. Question 3 Not yet answered Marked out of 1.00 Flag question Question text The Bohr theory was developed to explain which of these phenomena? Select one: a. Line spectra b. The photoelectric effect c. Quantum numbers d. X-rays Question 4 Not yet answered Marked out of 1.00 Flag question Question text True or False: Formaldehyde is a nonpolar compound. Answer: Question 5 Not yet answered Marked out of 1.00 false Flag question Question text Thomson referred to negatively charged particles as Answer before it became known as electrons. Question 6 Not yet answered Marked out of 1.00 Flag question Question text True or False: The alchemists have been successful in changing lead to gold. Answer: Question 7 Not yet answered Marked out of 1.00 Flag question Question text The water solubility of molecular compounds is Answer . Question 8 Not yet answered Marked out of 1.00 Flag question Question text corpus false variabl Question 15 Not yet answered Marked out of 1.00 Flag question Question text The various isotopes of an element all have Select one: a. the same number of neutrons and the same number of protons. b. the same total number of neutrons and protons. c. the same number of neutrons but different numbers of protons. d. the same number of protons but different numbers of neutrons. Question 16 Not yet answered Marked out of 1.00 Flag question Question text The Sun's energy is generated from the fusion of Select one: a. hydrogen nuclei to form helium nuclei. b. carbon nuclei to form magnesium nuclei. c. uranium to form lead, Pb. d. helium nuclei to form carbon nuclei. Question 17 Not yet answered Marked out of 1.00 Flag question Question text Who discovered the electron in 1897? Select one: a. Bohr b. Rutherford c. Dalton d. Thomson Question 18 Not yet answered Marked out of 1.00 Flag question Question text The "billiard ball model" of the atom is associated with Select one: a. Bohr. b. Rutherford. c. Thomson. d. Dalton. Question 19 Not yet answered Marked out of 1.00 Flag question Question text Thomson's revision of the model of the atom into what became known as Answer model. Question 20 Not yet answered Marked out of 1.00 Plum pu Flag question Question text Who discovered the atomic nucleus in 1911? Select one: a. Niels Bohr b. Henri Becquerel c. Marie and Pierre Curie d. Ernest Rutherford Matter is Answer if it can be rolled and stretched to long and thin shapes. Question 2 Not yet answered Marked out of 1.00 Flag question Question text True or False: Chromium is one of the soft elements. Answer: Question 3 Not yet answered Marked out of 1.00 Flag question Question text What type of compound is formed by the sharing of electrons? Answer: Question 4 Not yet answered DUCTIL FALSE Covalent compound Flag question Question text Answer refers to how fast a chemical reaction occurs. Question 12 Not yet answered Marked out of 1.00 Flag question Question text True or False: Carbon in graphite can be described as hard as the carbon in diamond. Answer: Question 13 Not yet answered Marked out of 1.00 Flag question Question text Answer refers to the concentration of a substance. Question 14 Not yet answered Marked out of 1.00 Flag question Question text What is the term for the property that makes it capable of being hammered into thin sheets? Select one: Reactio False concen a. Density b. malleability c. no correct answer Question 15 Not yet answered Marked out of 1.00 Flag question Question text True or False: Tools made from iron easily rust. Answer: Question 16 Not yet answered Marked out of 1.00 Flag question Question text Catalysts in living things are called Answer: Question 17 Not yet answered Marked out of 1.00 Flag question Question text Fill in the blank: The Answer property of a substance can be observed without changing the substance. Question 18 Not yet answered true enzymes physic Marked out of 1.00 Flag question Question text True or False: In determining the limiting reactant, mass quantities must be converted to moles. Answer: Question 19 Not yet answered Marked out of 1.00 Flag question Question text True or False: Platinum has very high density. Answer: Question 20 Not yet answered Marked out of 1.00 Flag question Question text True or False: Aluminum is a good conductor of heat. Answer: PHYSICAL SCIENCE week 10 only True True True