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Across
- 1. Two or more substances mixed together but not chemically joined
- 4. A chemical change when substances interact
- 5. A sudden shaking of the ground caused by movements deep inside Earth
- 7. A thread-like structure in cells that carries genetic information
Down
- 2. The slow process of living things changing over many years
- 3. A glass container used in science experiments
- 6. A unit of information that passes traits from parents to children