1. Which of the following is a characteristic property of a solid?
a) It has a definite shape but no definite volume.
b) It takes the shape of its container but has a definite volume.
c) It has neither a definite shape nor a definite volume.
d) It has both a definite shape and a definite volume.
Answer: d) It has both a definite shape and a definite volume.
2. What happens to the molecules in a liquid when the temperature is increased?
a) They move slower and come closer together.
b) They move faster and spread apart.
c) They do not change their speed.
d) They form solid crystals.
Answer: b) They move faster and spread apart.
3. Which of the following states of matter has a definite volume but no definite shape?
a) Solid
b) Liquid
c) Gas
d) Plasma
Answer: b) Liquid
4. What is the process called when a gas turns into a liquid?
a) Sublimation
b) Condensation
c) Evaporation
d) Freezing
Answer: b) Condensation
5. Which of the following is an example of a gas?
a) Ice
b) Water
c) Oxygen
d) Mercury
Answer: c) Oxygen
6. When water is boiled, it changes from a liquid to a gas. What is this process called?
a) Freezing
b) Melting
c) Evaporation
d) Condensation
Answer: c) Evaporation
7. What occurs during the process of sublimation?
a) A solid turns directly into a gas.
b) A liquid turns into a solid.
c) A gas turns into a liquid.
d) A liquid turns into a solid.
Answer: a) A solid turns directly into a gas.
8. Which of the following describes the molecules in a gas?
a) They are closely packed and vibrate in place.
b) They are loosely packed and flow past one another.
c) They are very far apart and move rapidly.
d) They are fixed in place and vibrate slightly.
Answer: c) They are very far apart and move rapidly.
9. What is the process called when a liquid turns into a solid?
a) Melting
b) Freezing
c) Condensation
d) Boiling
Answer: b) Freezing
10. What happens to the volume of a gas when it is compressed at constant temperature?
a) The volume increases.
b) The volume decreases.
c) The volume remains the same.
d) The volume first increases, then decreases.
Answer: b) The volume decreases.
11. What is the term for the change from a liquid to a solid?
a) Freezing
b) Melting
c) Condensation
d) Sublimation
Answer: a) Freezing
12. What occurs when a solid melts?
a) It turns into a gas.
b) It turns into a liquid.
c) It turns into a plasma.
d) It turns into another solid.
Answer: b) It turns into a liquid.
13. In which state of matter do molecules move the slowest?
a) Solid
b) Liquid
c) Gas
d) Plasma
Answer: a) Solid
14. When a substance is in a gaseous state, it will: a) Maintain a fixed shape and volume.
b) Take the shape of its container but not its volume.
c) Take both the shape and volume of its container.
d) Maintain a fixed volume but not its shape.
Answer: c) Take both the shape and volume of its container.
15. What happens to the temperature of a substance as it changes from a solid to a liquid at its melting point?
a) The temperature increases.
b) The temperature decreases.
c) The temperature remains constant.
d) The temperature fluctuates.
Answer: c) The temperature remains constant.