1. Part 1: Unit Conversions Complete each of the following conversions to the proper number of significant figures : clearly show your set up with units in the set up and the answer. 1) 0.30 m = mm 2) 5.00 mm = cm 3) 10.0 cm = in 4) 2.00 km = m 5) 33.4 L = ml 6) 15.0 lb = kg (use 2.20 lb = 1 kg) 7) 0.400 L = ml 8) 5.00 g = kg 9) 1.00 yd = cm (3 ft = 1 yard, exactly)
10) 6.35 g = kg 11) 8.245 L = ml 12) 16.9 fl. oz= L (0.0338 fl oz.= 1 ml) 13) 1.00 cm = m 14) 345 g = kg Part 2: Phase Change Descriptions Please fill in the blanks then underneath state whether the change is endothermic or exothermic. First, define endothermic and exothermic: Endothermic: Exothermic: Melting The change from to. Endo or exo? Freezing The change from to. Endo or exo? Evaporation The change from to. Endo or exo?
Condensation The change from to. Endo or exo? Sublimation The change from to. Endo or exo? Deposition The change from to. Endo or exo? Part 3: Physical and Chemical Change Multiple Choice For # 1 and 2, write a P for physical change, and a C for chemical change. 1. A ( Physical or Chemical ) change is a change of matter from one form to another without a change in chemical properties. 2. A ( Physical or Chemical ) change is a change that occurs when a substance changes composition by forming one or more new substances. For # 3-8, write a T for true and an F for false. 3. Color change is evidence that a chemical change may have occurred. 4. Fizzing or foaming is evidence that a chemical change may have occurred. 5. Production of sound is evidence that a chemical change may have occurred. 6. Production of heat or light is evidence that a chemical change may have occurred. 7. Production of an odor is evidence that a chemical change may have occurred. 8. Chemical changes cannot be reversed by physical changes.
For # 9-22, write a C for chemical change, and a P for physical change. 9. You cut your hair 10. Mixing sugar and water 11. Making a peanut, pretzel and cereal mixture 12. Baking soda reacts with vinegar and forms a gas 13. A piece of metal is bent in half. 14. Methanol is burned and leaves a residue 15. An aspirin is crushed into fine powder 16. Copper turns green when exposed to the environment 17. Two clear liquids are mixed and a yellow color forms 18. Baking cookies 19. Diamonds are used to scratch glass 20. A tree burns to form ashes 21. A piece of paper is crumpled up
22. Water freezes to form ice Part 4: Classification of Matter Choose words from the list to fill in the blanks in the paragraphs. chemical property intensive property compound mixture element physical property extensive property property heterogeneous matter substance homogenous matter
Matter has uniform characteristics throughout is called (1). Matter that has parts with different characteristics is called (2). A characteristic by which a variety of matter is recognized is called a(n) (3). A characteristic that depends upon the amount of matter in the sample is called a(n) (4). A characteristic that does not depend upon the amount of matter is called a(n) (5). A characteristic that can be observed without producing new kinds of matter is called a(n) (6). A characteristic that depends on how a kind of matter changes suring interactions with other kinds of matter is called (7). Matter can also be classified according to the basic types of matter it contains. A simple substance that cannot be broken down into other substances by chemical means is called (8). A chemical combination of simple substances is called (9). A physical combination of different substances that retain their individual properties is called a(n) (10). Either an element or a compound may be referred to as a(n) (11). 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11.
MIXTURES Classify each of the following as an element, compound, heterogeneous mixture, or homogenous mixture. 12. Water 13. Carbon 14. Air 15. Table salt, NaCl 16. Sugar dissolved in water 17. Granite 18. Homogenized milk 19. Oxygen 20. Sand in water Chemical and Physical Properties Classify each of properties listed below as extensive physical, intensive physical, or chemical. 1. Color 10. reactivity 2. Combustibility 11. Unreactive 3. Hardness 12. Odor 4. Density 13. stability 5. Mass 14. Malleability 6. Melting point 15. Tendency to corrode 7. Ductility 16. reacts with water 8. Volume 17. Weight 9. rusting 18. solubility