Exploring Matter
A Grade 7 science worksheet covering the states of matter, physical and chemical changes, and properties of matter.
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Exploring Matter: Grade 7 Science
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Read each question carefully and answer to the best of your ability. Show all your work for calculations.
1. Which state of matter has a definite shape and a definite volume?
Liquid
Gas
Solid
Plasma
2. What happens to the particles of a substance when it changes from a liquid to a gas?
They move closer together.
They lose energy.
They spread far apart and move rapidly.
Their chemical composition changes.
3. The process of a solid turning directly into a gas without passing through the liquid state is called .
4. A change in which a substance changes its physical form but not its chemical composition is known as a change.
5. The amount of matter in an object is called its .
6. Describe the main difference between a physical change and a chemical change. Provide one example for each.
7. Cutting a piece of paper is an example of a chemical change.
True
False
8. The volume of a gas is always constant.
True
False
9. Observe the diagram below showing the particle arrangement in different states of matter. Label each box with the correct state of matter (Solid, Liquid, or Gas).
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