Key Points:
- Heat is a form of energy that can cause substances to change.
- When heat is added to a substance, its particles gain energy and move faster.
- The addition of heat can cause changes in the state of matter, such as solid to liquid or liquid to gas.
- In the given options, only option C states that ice changes to liquid water with the addition of heat.

Explanation:
Introduction:
Heat is a form of energy that can cause substances to change. When heat is added to a substance, its particles gain energy and move faster. This increase in energy and movement can lead to changes in the substance, including changes in its state of matter.

Changes in States of Matter:
When a substance changes its state of matter, it means that its particles are arranged differently. There are three main states of matter: solid, liquid, and gas.

- Solid to Liquid: When heat is added to a solid, its particles gain energy and start to move more. The increase in energy causes the particles to overcome the forces holding them in a fixed position, and they start to slide past each other. This results in a change from a solid to a liquid state. This process is called melting. For example, when ice (solid water) is heated, it melts into liquid water.

- Liquid to Gas: When heat is added to a liquid, its particles gain more energy and move even faster. The increased energy causes the particles to break free from each other and escape into the air as gas. This process is called evaporation. For example, when liquid water is heated, it evaporates into water vapor (gas).

- Solid to Gas: When heat is added directly to a solid, its particles gain enough energy to break free and escape into the air as gas. This process is called sublimation. For example, when dry ice (solid carbon dioxide) is heated, it directly changes into carbon dioxide gas without melting into a liquid state.

Explanation of the Correct Answer:
In the given options, only option C states that ice changes to liquid water with the addition of heat. This is a correct statement because when heat is added to ice, its particles gain energy and start to move more. The increase in energy causes the particles to overcome the forces holding them in a fixed position, and they start to slide past each other. This results in a change from solid ice to liquid water. Therefore, option C is the correct answer.