Across
- 4. Longest day of the year
- 7. Any difference between individuals of the same species
- 10. Shortest day of the year
- 11. A force that pulls objects toward each other due to their masses
- 12. When the moon moves directly between the Sun and the Earth
- 13. One of two or more versions of a genetic sequence at a particular region on a chromosome
Down
- 1. The amount of matter in an object
- 2. A push or pull on an object
- 3. Darkest portion of the moon's shadow
- 5. An individual's physical traits
- 6. When Earth's shadow falls on the moon
- 8. The imaginary verticle line the Earth rotates on
- 9. A specific characteristic of an individual