Skills Worksheet- SCHUMACHER- EPE
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Name______Class______Date______Skills Worksheet- SCHUMACHER- EPE Concept Review
Section: Classifying Matter 1. Classify the following as a homogeneous, O, or a heterogeneous, E, mixture. ______a. a pail of sand and water ______d. banana split ______b. air ______e. chocolate syrup ______c. human blood ______f. seawater 2. Compare and contrast atoms and molecules. ______3. Explain the difference between a pure substance and a homogeneous mixture. ______4. Classify each of the following as E, an element, or C, a compound.
______a. benzene, C6H6 ______d. titanium, Ti
______b. aluminum, Al ______e. acetylene, C2H2
______c. aspirin, C9H8O4 ______f. zinc, Zn 5. Explain why elements and compounds are pure substances while a homogeneous mixture is not. ______6. Determine which of the following are pure substances, S, and which are mixtures, M.
______a. salt water ______d. ammonia, NH3
______b. isopropyl alcohol, C3H8O ______e. an egg yolk ______c. mercury, Hg ______f. honey 7. Explain why carbon and copper are classified as elements. ______
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