Module 2

3 What happens to water when it changes from liquid to gas?

• Freezing
• Evaporation
• Condensation

2 Which state of matter has a definite shape and volume?

• Gas
• Liquid
• Solid

4 A molecule is formed by the combination of:

• Protons
• Atoms
• Electrons

5 Which of the following is a chemical compound?

• Oxygen (O₂)
• Water (H₂O)
• Nitrogen (N₂)

6 The process of a solid turning directly into a gas is called:

• Sublimation
• Melting
• Condensation

7 Which state of matter has particles that are far apart and move freely?

• Solid
• Liquid
• Gas

8 What is the primary source of energy for Earth’s climate system?

• The Moon
• The Sun
• The Earth’s core

9 The atomic number of an element is determined by:

• Number of neutrons
• Number of protons
• Number of electrons

10 Which of the following is NOT a state of matter?

• Plasma
• Liquid
• Energy

11 A force is best described as:

• A push or pull
• A type of energy
• A form of heat