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7.1 Classification of Matter by Composition
Pearson Education
www.sciencesource.ca
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Across
1. _____ oil is a mixture of pure substances that sticks to everything it contacts, creating a mess that is difficult to clean up.
4. Matter can be _____ as a solid, a liquid or a gas.
6. By studying the _____ of substances, environmental experts can find new methods to treat environmental contamination.
9. A mechanical mixture can also be called a _____ mixture because it is made up of many different substances, each with different appearances and characteristics.
11. Mixtures can be classified as either solutions or _____ mixtures.
12. A _____ is made up of two or more different types of matter.
14. Pure substances appear uniform, or _____, throughout.
15. _____ have the same appearance throughout but are made up of two or more substances. These are all homogeneous mixtures.
16. Rainwater, orange juice, mouthwash and gasoline are all made up of _____ matter.
Down
2. The prefix “hetero“ comes from the Greek word “heteros” which means “_____.”
3. An “educated guess” is based on prior knowledge. In science it is called an _____.
5. Air is made up of different types of _____, such as oxygen and nitrogen.
7. Matter can be classified by its _____ state: solid, liquid or gas.
8. A _____ substance is made up of only one type of matter.
10. _____ is anything that has mass and takes up space.
13. Textbooks, trees, cars and running shoes are all made up of _____ matter.
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