Across
- 5. The explosion of a massive star
- 8. The shapes of continental coastlines were one of the main pieces of evidence that supported this hypothesis
- 10. The color of a mineral's powder
- 11. The planet with the most moons
- 14. The plate boundary where 2 plates slide past each other
- 15. Pluto's current classification
- 17. Slabs of continental crust are __________ plates
- 19. Mineral breakage along smooth, flat surfaces
- 21. The planet with only 1 moon
- 22. A rock with round grains that appear to be glued together
- 25. The kind of rock made from cooled magma or lava
- 26. The average distance from earth to the sun
- 27. An object with gravity so great that no light can escape
- 29. The distance light travels in a year
Down
- 1. What astronomers use to divide the night sky into regions
- 2. __________ planets have rocky surfaces
- 3. Mineral breakage along uneven edges
- 4. a supercontinent made of the present-day continents
- 6. The number of planets in our solar system
- 7. __________ planets have gaseous surfaces
- 9. The plate boundary where 2 plates move away from each other
- 12. The gas the outer planets are mostly composed of
- 13. The plate boundary where 2 plates move toward each other
- 16. Chunks of rock and ice that form a belt between Mars and Jupiter
- 18. A meteorite crashing into the moon would most likely make a ________
- 20. The orderly arrangement of atoms gives a mineral its __________ structure
- 23. The galaxy that our solar system is in
- 24. The shape of the planets' orbits
- 28. The shape of our galaxy