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Across
- 3. A material that does not let electricity or heat pass through easily
- 8. To say what you think will happen based on evidence
- 9. A curved piece of glass that bends light
Down
- 1. To study something carefully to understand it
- 2. A state of matter that spreads to fill any space
- 4. Any living thing such as a plant or animal
- 5. A substance made of two or more elements bonded together
- 6. A form of energy that makes things warm
- 7. The tiny building block that makes up all living things