Across
- 1. unit of measurement for electric current
- 3. the smallest unit of matter
- 6. force that attracts objects towards the center of the Earth
- 7. name for the study of the Earth's physical structure and composition
- 9. process by which a liquid turns into a gas at a temperature below its boiling point
Down
- 2. process by which plants convert sunlight into chemical energy
- 4. branch of science that studies the Earth's atmosphere
- 5. dioxide primary gas responsible for causing global warming
- 8. study of heredity and genetic variation called