The process where a liquid turns into a gas without boiling is known as:

• A) Condensation
• B) Boiling
• C) Evaporation
• D) Sublimation
• Answer: C) Evaporation

What happens to the temperature of a substance during a phase change?

• A) It increases
• B) It decreases
• C) It remains constant
• D) It fluctuates
• Answer: C) It remains constant

What is the process called when a gas changes into a solid?

• A) Freezing
• B) Deposition
• C) Melting
• D) Sublimation
• Answer: B) Deposition

Which state of matter has a definite shape but no definite volume?

• A) Solid
• B) Liquid
• C) Gas
• D) None of the above
• Answer: D) None of the above

In which state of matter do particles move slowly and vibrate in fixed positions?

• A) Solid
• B) Liquid
• C) Gas
• D) Plasma
• Answer: A) Solid

Which of the following states of matter can be compressed the most?

• A) Solid
• B) Liquid
• C) Gas
• D) Plasma
• Answer: C) Gas

Which of the following properties is characteristic of liquids?

• A) Definite shape
• B) Definite volume
• C) High compressibility
• D) High density
• Answer: B) Definite volume

The transition from liquid to gas that occurs at a specific temperature is called:

• A) Condensation
• B) Freezing
• C) Boiling
• D) Sublimation
• Answer: C) Boiling

Which of the following is true about gases?

• A) They have a definite shape and volume.
• B) They can expand to fill the shape and volume of their container.
• C) They have strong intermolecular forces.
• D) Their particles are closely packed.
• Answer: B) They can expand to fill the shape and volume of their container.

The process in which a solid turns directly into a gas is called:

• A) Condensation
• B) Melting
• C) Sublimation
• D) Freezing
• Answer: C) Sublimation