Instructions
Read the information below about heat and changes of state carefully. Then, answer the questions that follow each section.
Understanding Changes of State
When you add heat to a substance, it can change from one state to another. For example, ice (solid) turns into water (liquid) when heat is added. This process is called melting. Similarly, when you remove heat from a substance, it can also change state. Water (liquid) turns back to ice (solid) when heat is removed. This is called freezing.
Adding Heat
Adding heat typically causes a substance to change from a solid to a liquid (melting) or from a liquid to a gas (evaporation). For instance:
- Ice melts into water when heated.
- Water boils and turns into steam when heated.
Now, answer the questions below:
- What happens to ice when heat is added?
- What is the process called when water turns into steam?
Removing Heat
Removing heat causes a substance to change from a gas to a liquid (condensation) or from a liquid to a solid (freezing). For example:
- Steam cools and becomes water when heat is removed.
- Water freezes into ice when it loses heat.
Please answer the questions below:
- What happens to steam when heat is removed?
- What is the process called when water turns into ice?
Explore More!
Choose one example of a change of state, and draw a simple illustration of it. Below, draw your picture: