Across
- 5. Parts of trees that change color and fall off in autumn.
- 6. The process plants use to make food from sunlight.
- 8. The main signal that tells plants and animals the season.
- 9. A time when day and night are nearly equal in length.
- 10. A long, deep sleep some animals enter during winter.
- 11. A tool people use to track time, like nature uses light.
- 19. The world of living things that responds to the equinox.
- 20. Half of Earth, such as northern or southern.
Down
- 1. The divisions of the year caused by Earth’s tilt and orbit.
- 2. Plant parts that store energy during colder months.
- 3. A type of bird that flies south in fall.
- 4. Insects such as monarchs that travel thousands of miles.
- 7. Animals that gather nuts and store food for winter.
- 12. Changes in animals that help them survive winter.
- 13. The hours of light we receive from the Sun.
- 14. The green pigment in leaves that breaks down in fall.
- 15. What the equinox represents between day and night.
- 16. What increases after the fall equinox as nights grow longer.
- 17. To travel long distances, like geese and butterflies do.
- 18. The season that begins with the fall equinox.