Unit 5: Physical States of Matter
What happens to the pressure of a gas if its volume decreases and the temperature remains constant?
- A) Pressure decreases
- B) Pressure increases
- C) Pressure remains the same
- D) Pressure fluctuates
- Answer: B) Pressure increases
Which of the following states of matter is most easily compressible?
- A) Solid
- B) Liquid
- C) Gas
- D) Plasma
- Answer: C) Gas
The change from liquid to solid is called:
- A) Freezing
- B) Melting
- C) Condensation
- D) Boiling
- Answer: A) Freezing
In which state of matter do particles have the greatest freedom of movement?
- A) Solid
- B) Liquid
- C) Gas
- D) Plasma
- Answer: C) Gas
Which process involves a liquid turning into a gas below its boiling point?
- A) Condensation
- B) Evaporation
- C) Freezing
- D) Melting
- Answer: B) Evaporation
Which of the following describes the shape of a liquid?
- A) Fixed shape and volume
- B) Fixed shape but variable volume
- C) Variable shape and fixed volume
- D) Variable shape and volume
- Answer: C) Variable shape and fixed volume
The energy required to change a liquid into a gas is known as:
- A) Heat of fusion
- B) Heat of combustion
- C) Latent heat of vaporization
- D) Specific heat capacity
- Answer: C) Latent heat of vaporization
The temperature at which a substance changes from a solid to a liquid is called:
- A) Melting point
- B) Freezing point
- C) Boiling point
- D) Condensation point
- Answer: A) Melting point
Which of the following is an example of a physical change?
- A) Combustion
- B) Rusting
- C) Melting
- D) Digestion
- Answer: C) Melting