Name_______________________________________________Period________Date________________ Unit 1 Matter - Study Guide 1. What is an element? 2. What is a compound? 3. What is a homogeneous mixture? 4. What is a heterogeneous mixture? Item E/C/Hom/Het Item Hydrogen sulfide Silver Tap Water Coffee Aluminum Rocky Road Ice Cream Chex Mix Helium Oreos Pure water (H2O) Gold Lemonade (no pulp) Sodium Chloride Iron oxide (Fe2O3) Air Taco E/C/Hom/Het 5. What is a physical change? 6. What is a chemical change? 7. What are the five signs of a chemical change? Event Physical or Chemical Event Water condensing Bread baking Wood burning Leaf decaying Iron rusting Steel melting Filing a nail Sawing wood in half Animal decomposing Food digesting Reshaping clay Pencil breaking Alcohol evaporating Striking a match Food rotting Water freezing Physical or Chemical Name_______________________________________________Period________Date________________ 8. What is a physical property? 9. What is a chemical property? Property Physical or Chemical Property Color Luster Flammability Toxicity Density Hardness Length Elasticity Ability to rust Melting point Boiling point Reactivity Malleability Mass Brittleness Freezing point Physical or Chemical 10. What is a solid? 11. What is a liquid? 12. What is a gas? 13. Describe the movements of solids, liquids, and gases from fastest to slowest. Solid Liquid Definite Shape? Definite Volume? Movement Description Drawing 14. What is the Law of Conservation of Matter? 15. What units do we use to measure volume? 16. What units do we use to measure mass? 17. What is the formula for density? 18. What is the density of a liquid that has a mass of 2.55 g and a volume of 5.78 mL? Gas Name_______________________________________________Period________Date________________ 19. What is the density of a piece of metal that has a volume of 2.68 mL and a mass of 16.5 g? 20. You measure the density of the Ohio River three times with readings of 1.08 g/mL, 1.11 g/mL, and 1.21 g/mL. What is the average density? 21. You have a rubber eraser with a density of 1.522 g/cm3. What is the mass of your eraser if it is 0.75 cm x 2.50 cm x 6.20 cm? 22. How many centimeters are in 612 inches? 23. How many feet are in 283 centimeters? 24. How many seconds are in 2.67 minutes? 25. How many hours are in 1.175 years? 26. How many significant figures are in the following numbers? Number Sig Figs Number 2.5 7.001 1000 0.0080 3.90 300. 0.10 1000000 56.0 0.0408 200 2.0 101 4010 0.005 4010. Sig Figs
