Matter can change its state or form, but it's still the same stuff! Changes in matter happen when you add or remove energy, usually in the form of heat. For example, melting is when a solid turns into a liquid (like an ice cube melting into water), and boiling is when a liquid turns into a gas (like water boiling into steam). These are physical changes because the water is still water, just in a different form. Sometimes matter changes chemically, creating something completely new, like when you bake a cake!
Match the words with their definitions:
| Word | Definition |
|---|---|
| 1. Melting | A. The change from a liquid to a gas. |
| 2. Boiling | B. The change from a solid to a liquid. |
| 3. Evaporation | C. A change that produces a new substance. |
| 4. Condensation | D. The change from a gas to a liquid. |
| 5. Chemical Change | E. When a liquid slowly turns into a gas. |
Use the following words to fill in the blanks: freezing, matter, physical, heat, state.
All things are made of __________. Adding or removing __________ can change the __________ of matter. For example, __________ is when liquid water turns into solid ice. These are examples of __________ changes.
Imagine you have a glass of lemonade on a hot day. Describe all the changes in matter that you observe, and explain whether they are physical or chemical changes.
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