Reviewer on Science 7, Exercises of Chemistry

Download Reviewer on Science 7 and more Exercises Chemistry in PDF only on Docsity! Reviewer Science 7 I. IDENTIFICATION 1. The study of Earth and its composition, what processes happen in its interior and its surface and how it is similar to and different with other entities in space. 2. It uses the discoveries of pure sciences to create solutions and create products that can be used in actual settings. 3. They study the development of living organisms from fertilized egg stage through hatching or birth. 4. Properties that depend on the amount of matter. 5. The simplified form of matter, which cannot be decomposed by ordinary chemical means. 6. Substances whose colors are affected by acids and bases. 7. The process of mixing an acid and a base to produce a neutral solution. 8. The composition produced by a neutralization reaction between an acid and a base. 9. This property allows electricity to pass through a material. 10. Elements that have the intermediate properties between metals and nonmetals. II. MATCHING TYPE 1. Beaker 2. Reagent bottle 3. Bunsen burner 4. Buret 5. Crucible 6. Erlenmeyer Flask 7. Evaporating dish 8. Florence flask 9. Funnel 10. Microspatula 11. Mortar and pestle 12. Pipette 13. Ring stands 14. Stirring rods 15. Corks 16. Test tube holder 17. Thermometer 18. Tongs 19. Clay triangle 20. Volumetric flask a. Used to make up solutions of fixed volume b. Used in the process of heating substance c. Allows the heat to distribute through the liquid more evenly d. Used to transfer liquids into another container so they will not spill e. A simple container used for mixing, stirring and heating liquid f. Used to heat and evaporate liquids g. Used for storage, mixing and display h. A small laboratory burner consisting of a vertical metal tube connected to a gas source i. The bottom is wider than the top so it will heat up quicker j. Used for accurate fluid dispensing and measurement k. A vessel made of substances porcelain used for melting materials at a high temperature. l. Used to support items being heated m. Used for moving small amounts of liquid from one container to another n. Used for transferring small amounts of solid from one container to another o. Used to grind solids into powders for experiments. p. Used to stir solutions to dissolve substances q. Used to seal tubes and flasks r. Used to hold test tubes while being heated s. Used to take temperature of solids, liquids and gases t. Used to hold different objects such as flasks. III. IDENTIFYING THE SYMBOLS 1. Tin 2. Lead 3. Tungsten 4. Potassium 5. Cesium 6. Rubidium 7. Xenon 8. Uranium 9. Calcium 10. Iron 11. Barium 12. Sodium 13. Lithium 14. Tellurium 15. Cobalt IV. MULTIPLE CHOICE 1. Which of the following methods separate mixtures with the use of magnet? a. Decantation b. Evaporation c. Filtration d. Magnetic separation 2. Which of the following methods where you put an open container under the sun? a. Decantation b. Evaporation c. Filtration d. Magnetic separation 3. Which of the following components that is hard to identify as they are chemically combined? a. Solute b. Substance c. Solvent d. Solution 4. Which of the following is a process that scientists used to separate many liquid mixtures? a. Distillation b. Chromatography c. Evaporation d. Filtration 5. Which of the following is a bleaching agent in the manufacture of textile and paper? a. Chlorine b. Silicon c. Oxygen d. Sulfur 6. Which value corresponds to the pH of pure water? a. 14 b. 7 c. 3 d. 1 7. Which type of substance is sodium chloride (NaCl)? a. Acid b. Base c. Salt d. Sugar 8. Which does not belong to the group? a. Sodium b. Tungsten c. Aluminum d. Tin 9. Sulfur and iron filings are put together. The components can be separated through which process?