- 1. True or false. Atoms in a liquid are farther apart than the atoms in a gas.
A) False
B) True
- 2. True or false. A system that changes from a solid state to a liquid state gains energy.
A) True
B) False
- 3. When a substance goes from being a solid to a liquid, it is a ____________ change.
A) chemical
B) physical
- 4. True or false. You may find plasma in a star.
A) True
B) False
- 5. Which has the least energetic molecules?
A) Gases
B) Solids
C) Liquids
D) Plasma
- 6. True or false. All solutions are mixtures, and all mixtures are solutions.
A) False
B) True
- 7. If you leave water in a glass and some molecules turn into a gas, it is called _____________.
A) condensation
B) evaporation
C) extinction
D) solidification
- 8. Which of these choices will NOT change the state of matter?
A) temperature
B) electricity
C) crushing a crystal
D) pressure
- 9. True or false. Because electrons have been stripped away from atoms in plasma, plasma has a negative charge.
A) False
B) True
- 10. As the pressure of a system changes, boiling points can change in what direction?
A) Both increase and decrease
B) Increase only
C) Decrease only
D) No change
- 11. True or false. The molecules in a gas are in constant motion.
A) True
B) False
- 12. True or false. Mixtures are combinations of one or more compounds that can be separated with chemical processes?
A) False
B) True
- 13. True or false. Crystals can be made of mixtures.
A) True
B) False
- 14. True or false. When a liquid is cooled very quickly, it always forms a crystal.
A) False
B) True
- 15. True or false. It is just as easy to compress a liquid as it is to compress a gas.
- 16. What state of matter would you expect to find the compound H2O at when it is at room temperature?
A) Solid
B) Liquid
C) Plasma
D) Gas
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