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Across
- 2. The passing of traits from parents to their children
- 6. A substance made of two or more elements bonded together
- 8. A form of energy that allows us to see
- 9. A substance that living things need for energy and growth
Down
- 1. To say what you think will happen based on evidence
- 3. A pure substance made of only one type of atom
- 4. Vibrations that travel through the air and are heard by ears
- 5. To study something carefully to understand it
- 7. A form of energy that makes things warm