Across
- 4. Imaginary line dividing Earth in half
- 5. Invisible layer of air surrounding the Earth
- 9. Deep winter sleep some animals take
- 11. How plants turn sunlight into food
- 12. Animal that sleeps during the day and hunts at night
Down
- 1. Hunter of the animal kingdom
- 2. How animals hide by blending into surroundings
- 3. When birds fly south for the winter
- 6. Animal that only eats meat
- 7. Massive space rock crashing into earth
- 8. When wind and water slowly wear away rock
- 10. Study of the living things