Learning activity sheets on senior high school, Exercises of Physics

Download Learning activity sheets on senior high school and more Exercises Physics in PDF only on Docsity! General Physics 1 Learning Activity Sheets (First Quarter) Learning Objective: 1. Solve measurement problems involving conversion of units, expression of measurements in scientific notation; STEM_GP12EU-Ia-1 Activity 1 Materials: Ruler Bond Paper(Long) Egg (medium) Slipper Ping-Pong ball Soft drink Bottle (1L) Procedures: 1. Using a ruler, take the length of each specified objects below. Use centimeters as a unit of measurement. A) Soft drink bottle (1 L) B) A sheet of bond paper (long) C) A slipper (size 10) D) An egg (medium size) E) A pingpong ball 1 | P a g e Name: _________________________________ Section: _________________________________ 2. Using the other side of the ruler which uses inch as its unit, record the measurement of each of the above objects.3. Record your answers on the table below: Object/Thing Metric Unit English Unit 1. Soft drink Bottle (1L) 2. A sheet of bond paper (long) 3. A slipper (size 10) 4. An egg (medium size) 5. A Ping-Pong ball Questions: 2. Which of the objects listed is the shortest? The longest? What is their dimension? 2. As what you can see on the ruler, how many centimetres is equivalent to an inch? 3. Do you think that each measurement expressed in different units for the same material is equal? Why? Measurement Defined Measurement is the act of determining matter’s size, length, weight, capacity or other aspect. In general, measurement can be understood as one action within the term instrumentation. When we measure we compare the material’s basic properties with the accepted international standards for its accuracy and precision. A measurement unit is a standard quantity used to express a physical quantity. Whatever is chosen as a standard must be readily accessible and possess some property that can be measured reliably—measurements taken by different people in different places must yield the same result. In measuring physical quantities, there are two systems of measurement commonly used by different countries all over the world, these are Metric Units and the US Standard Unit (English Unit). Length describes how long a thing is from one end to another. Mass is the amount of matter a thing consists of. Time is the ongoing sequence of events. Below are the common units of measurement in the basic physical quantities: 2 | P a g e flask, you may read the value from a different angle each time. Measuring your (10)__________________is affected by minor posture changes. Activity 4. Problem Solving Direction: Solve what are asked below: 1. A rectangular building lot is 100 ft by 150 ft. Determine the area of this lot in m2. 2. The mass of the Sun is 1.99 x 1030 kg, and the mass of an atom of hydrogen, of which the Sun is mostly composed, is 1.67 x 10 27 kg. How many atoms are there in the Sun? 3. Walt grew 10 centimeters in 1 year. He is now 1.6 m tall. How tall was he 1 year ago? 4. Chase measured a line for his art project. It is 200 millimeters long. How many centimeters is the line? 5. John wanted to impress his friends by winning the 200 yard dash at the track meet. If he runs 8.2 feet per second, how long will it take him to complete the dash? (round to the nearest tenth) Accuracy and Precision Defined In a measurement of anything, accuracy is the closeness of the measurements to a specific value, while precision is the closeness of the measurements to each other. Alternatively, ISO defines accuracy as describing a combination of both types of Observational error above (random and systematic), so high accuracy requires both high precision and high trueness. In simpler terms, given a set of data points from repeated measurements of the same quantity, the set can be said to be accurate if their average is close to the true value of the quantity being measured, while the set can be said to be precise if the values are close to each other. In the first, more common definition of “accuracy” above, the two concepts are independent of each other, so a particular set of data can be said to be either accurate, or precise, or both, or neither. The main difference between systematic and random errors is that random errors lead to fluctuations around the true value as a result of difficulty taking measurements, whereas systematic errors lead to predictable and consistent departures from the true value due to problems with the calibration of your equipment. This leads to two extra differences that are worth noting. 5 | P a g e Activity 5. Accurate or Precise? A scientist weighed a set of standard masses in grams on four different balances. Assume each standard mass is the true value with no error. Table 1. Different Masses Measured in Different Balances Standards Balance 1 Balance 2 Balance 3 Balance 4 12. 12. 11. 12. 15. 8. 2 8. 1 6.5 8. 3 9.4 6. 6.2 7. 6. 8.1 3. 3.4 1.9 3. 4.2 10. 10. 12. 10. 11. Q1. Based on the table above, which among the balances is precise and accurate? PRECISE ACCURATE 6 | P a g e Activity 6. True or False! Direction: Read the statement carefully and write TRUE if the statement is correct and FALSE if not. Write your answers on a separate sheet of paper. 1. Accuracy represents how closely the results agree with the standard value. 2. Eliminating the systematic error improves accuracy but does not change precision. 3. In numerical analysis, accuracy is also the nearness of a calculation to the true measurement. _____ 4. The term accuracy is interchangeably used with validity and constant error. 5. Accuracy is obtained by taking small readings. 6. Accuracy represents how closely results agree with one another. 7. The closeness of two or more measurements to each other is known as the accuracy of a measurement. 8. Accuracy is the measure of correctness of the value in correlation with the information. 9. Accuracy is the amount of information that is conveyed by a value. 10. Accuracy is a description of systematic error. Learning Objective: 4. Estimate errors from multiple measurements of a physical quantity using variance STEM_GP12EU-Ia-4 Activity 7. Materials: Small stone or any material that can be dropped at a distance a meter stick, stop watch Procedures: 1. From the floor level measure a height of 2 meters. 7 | P a g e