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4 cards from this section. Quick, good the night before a test.
What is matter?
Think of what you can touch or see around you.
Name one example of a gas.
What do we breathe?
What is matter?
Think about things you can touch.
True or False: All gases have a fixed shape.
Consider what happens when you blow air into a balloon.
You have a mixture of sand and salt water. Describe how you would separate them using their physical properties.
Think about how you usually separate solid materials from liquids.
Explain why chemical changes are usually irreversible while physical changes can be reversed, using real-world examples.
Reflect on what happens during cooking versus simple changes in state.
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