Across
- 7. The outermost layer of Earth’s lithosphere that is found under the oceans and formed at spreading centers on oceanic ridges, which occur at divergent plate boundaries.
- 8. An underwater mountain range, formed by plate tectonics.
- 9. A longitudinal earthquake wave that travels through the interior of the earth and is usually the first conspicuous wave to be recorded by a seismograph
- 10. The uniform microwave radiation remaining from the Big Bang.
- 11. A fixed luminous point in the night sky that is a large, remote, incandescent body like the sun
- 12. Formed by the gravitational collapse of a star exploding as a supernova, whose gravitational field is so intense that no electromagnetic radiation can escape
- 13. A star in an intermediate stage of evolution, characterized by a large volume, low surface temperature
Down
- 1. A transverse earthquake wave that travels through the interior of the earth and is usually the second conspicuous wave to reach a seismograph
- 2. A theory that deduces a cataclysmic birth of the universe from the observed expansion of the universe, cosmic background radiation, abundance of the elements, and the laws of physics
- 3. Hypothetical landmass that existed when all continents were joined, from about 300 to 200 million years ago
- 4. A wave of energy that is generated by an earthquake or other earth vibration and that travels within the earth or along its surface
- 5. The lateral movement of continents resulting from the motion of crustal plates
- 6. A star that suddenly increases greatly in brightness because of a catastrophic explosion that ejects most of it's mass
- 9. Theory that Earth's outer shell is divided into several plates that glide over the mantle, the plates act like a hard and rigid shell compared to Earth's mantle.
- 14. An attracting force