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Questions and Answers
What happens to the molecules of water when it freezes into ice?
What happens to the molecules of water when it freezes into ice?
- They become more closely packed together. (correct)
- They expand and move farther apart.
- They dissolve into smaller particles.
- They stay in a fixed position without movement.
Which process describes the change of water from a gas to a liquid?
Which process describes the change of water from a gas to a liquid?
- Boiling
- Condensation (correct)
- Evaporation
- Melting
Which of the following is an example of a physical change?
Which of the following is an example of a physical change?
- Sugar dissolving in water
- Wood burning
- A paper being crumpled (correct)
- Iron rusting
When a solid ice cube melts, what form of matter does it become?
When a solid ice cube melts, what form of matter does it become?
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How can matter undergo a change in size?
How can matter undergo a change in size?
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Study Notes
Changes in Matter
- Matter changes due to variations in molecular behavior; molecules can be close together or move apart freely.
- Water is a prime example of matter transitioning between different states: solid (ice), liquid (water), and gas (water vapor).
Physical Changes in Matter
- Matter can undergo physical changes affecting its size and shape or altering its form.
- Size or Shape Change: Crumpling a piece of paper results in a new size and shape compared to its original form.
- Form Change: Liquid water can freeze to become ice cubes, showcasing a transformation in physical state.
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