Across
- 3. shortest, most energetic radiation
- 5. the shape of the planet's orbit
- 7. rocks formed when solids settle out of air or water
- 10. the hotter zone beneath the lithosphere
- 13. the major rock types are metamorphic, sedimentary, and ____________
- 17. where most volcanoes occur
- 19. proposed heliocentrism, the theory that the sun is at the center of the solar system
- 21. a well tested explanation of observable phenomena
- 22. small, rocky objects that orbit the sun in a belt between Mars and Jupiter
- 24. physical, chemical, and biological laws that operate today also operated in the past
- 25. caused layers to form as Earth cooled
Down
- 1. metamorphic rocks that contain only one mineral and do not have a banded texture
- 2. the supercontinent that existed before the current continents
- 4. result from composition and crystal structure
- 6. continuous process that causes rocks to change
- 8. the remains or traces of prehistoric life
- 9. when a mineral breaks in random patterns
- 11. theory that the solar system developed from a cloud of dust
- 12. the Earth is about 4.5 _______ years old
- 14. one tectonic plate is pushed underneath another plate
- 15. hypothesis proposed that the continents were once part of one large land mass
- 16. a meteoroid that survives the trip through Earth's atmosphere to hit the ground
- 18. the source of the Sun's energy
- 20. the color of a mineral in powdered form
- 23. some minerals can be more than one ______________