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Across
- 1. To find the size, amount, or degree of something
- 7. Carefully watching and noting what happens
- 8. A material that electricity or heat can pass through easily
Down
- 2. A test done to discover something new
- 3. The remains of a plant or animal from long ago preserved in rock
- 4. Vibrations that travel through the air and are heard by ears
- 5. The process of getting bigger or more developed
- 6. A push or pull that can change how something moves