Across
- 2. A force between elements where electrons are shared or transferred.
- 4. Energy of motion.
- 9. Eclipses happening when the Earth is between the Moon and the Sun.
- 11. Non-living factors in the environment.
- 12. Seasons are caused by Earth's revolution and ________.
- 14. The cause of day and night on Earth.
- 15. SI (System International)unit used to measure length.
- 16. A question that can be tested in an experiment.
- 18. A stream that runs into another stream or river.
- 20. The ability to do work.
- 21. Horizontal columns on the Periodic Table.
Down
- 1. Gas changes to a liquid.
- 3. The variable chosen by the experimenter.
- 5. A _________ front is likely to bring thunderstorms.
- 6. Layer of the atmosphere that contains Ozone.
- 7. Tool used to measure wind speed.
- 8. Area of land drained by a river system.
- 10. When the moonlight appears to be getting smaller.
- 13. The river that drains Virginia's largest watershed.
- 17. Caused by the gravitational pull of the moon.
- 19. Name for planets similar to Earth.