Across
- 3. very large outer four planets in the solar system
- 4. Belt a region of the solar system beyond the orbit of neptune
- 5. metallic or silicate-rich object that orbits the sun in a belt between Mars and Jupiter
- 7. are low, warm, dark-colored clouds that sink
- 8. air polluted with hydrocarbons and nitrogen oxides
- 9. an object due to its own gravity has a sphere shape, orbits the sun, is not a satellite and has not cleared the area of orbit for small debris
- 12. an asteroid fragment or any other interplanetary material
- 13. earth crosses the trail of a comet, particles left in the trail burn up in Earth's atmosphere producing bright streaks of light
Down
- 1. the part that hits the ground
- 2. form of hydrogen that has both properties of liquid and metal
- 6. small icy bodies that have highly eccentric orbits around the sun
- 10. streak of light produced when a meteoroid passes through earth's atmosphere
- 11. are high, cool, light-colored clouds that rise