CHEMISTRY / CODE: SCS21A
2014-2015 SCHOOL YEAR / INSTRUCTOR: Ms. Bui
CLASSROOM: 510 / LAB ROOM: 506

PHYSICAL BEHAVIORS OF MATTERS

Name______/ Period: ______
Date: ______/ Subject: Chemistry
READ:
  • Matter is classified as a pure substance or as a mixture of substances.
  • A pure substance (element or compound) has a constant composition and constant properties throughout a given sample, and from sample to sample
  • Elements are substances that are composed of atoms that have the same atomic number. Elements can not be broken down by chemical change.
  • Mixtures are composed of two or more different substances that can be separated by physical means. The components of a mixture can vary. When different substances are mixed together, a homogeneous (uniform) or heterogeneous (not uniform) mixture is formed.
  • The three phases of matter (solids, liquids, and gases) have different properties. Matters can change phases
  • Melting – solid to liquid
  • Freezing – liquid to solid
  • Evaporation – liquid to gas
  • Condensation – gas to liquid
  • Deposition – gas to solid
  • Sublimation – solid to gas

  1. Which substance can not be broken down by chemical means?
  2. Ammonia
  3. Antimony
  4. Methane
  5. Water
  6. Which substance can not be broken down by a chemical change?
  7. Methane
  8. Propanal
  9. Tungsten
  10. Water
  11. Which substance can NOT be broken down by a chemical change?
  12. Ammonia
  13. Ethanol
  14. Propanal
  15. Zirconium
  16. Two grams of potassium chloride are completely dissolved in a sample of water in a beaker. This solution is classified as
  17. An element
  18. A compound
  19. A homogeneous mixture
  20. A heterogeneous mixture

  1. Salt water is classified as a
  2. Compound because the proportion of its atoms is fixed
  3. Compound because the proportion of its atoms can vary
  4. Mixture because the proportion of its components is fixed
  5. Mixture because the proportion of its component can vary
  6. A substance is classified as either an element or a
  7. Compound
  8. Solution
  9. Heterogeneous mixture
  10. Homogeneous mixture
  11. Which diagram represents a mixture of two different molecular forms of the same element?
  1. A gas changes directly to a solid during
  2. Fusion
  3. Deposition
  4. Saponification
  5. Decomposition