Across
- 3. A streak of light in the sky produced by the burning of a meteoroid in Earth's atmosphere.
- 5. A tectonic plate boundary where two plates collide, come together, or crash into each other.
- 7. A force of attraction between objects that is due to their masses.
- 9. Rocky metallic objects that orbit the sun but are too small to be considered planets.
- 10. Large clumps of ice, dust and frozen gases that travel around the Sun in long elliptical orbits.
Down
- 1. Having the conditions necessary to support life.
- 2. The boundary between two tectonic plates that are moving away from each other.
- 4. The measure of the effect of gravity on an object.
- 6. The boundary between tectonic plates that are sliding past each other horizontally.
- 8. The measure of the amount of matter in an object.