Science

4. A scientific law that supports the oldest rock layers will always be on the bottom and the youngest will always be on the top.
6. The force that causes planets to be spherical.
8. A season when the Southern axis is tilted away from the Sun.
10. A type of fossil that leaves parts of the organism's body.
13. When the Earth is between the Sun and Moon.
15. A type of fossil, usually when a bug is preserved in tree sap.
16. When Earth materials are worn away by natural forces.

1. When the Moon is between the Earth and Sun.
2. One of the moon phases that is not visible.
3. The name of the four outer planets.
5. The name of the four inner planets.
7. When an object spins on its axis over the course of one day.
9. When an object moves in a circular motion around another object over the course of a year.
11. One of the moon phases that if fully illuminated.
12. When a celestial object follows an elliptical course around anther celestial object due to gravity.
14. A season when the Northern axis is tilted towards the Sun.