Science Unit Crossword Puzzle

2. core ____________ is a layer of liquid metals.
3. spots They are heated rocks that rise into plumes, or thin columns, from the mantle.
5. current A motion that transfers heat energy in a material.
6. A thin layer of cool rock, that surrounds Earth.
10. plates The lithosphere is broken into many large and small slabs of rock called ________.
11. The Earth's thickest layer.
12. Earth's crust and the very top of the mantle together form the ___________.
15. When earthquakes occur, soil _________ is likely to happen; causing the soil to act like liquid.
17. waves It is a vibration caused by an earthquake.
18. boundary ____________ occurs where plates scrape past each other.

1. ridges Huge underwater mountain ranges.
4. A water wave that changes as waves come in is called a ________.
5. drift In 1912, Wegener proposed a hypothesis known as _______________.
7. A sudden and violent shaking of the ground, sometimes causing great destruction, as a result of movements.
8. It is a smaller earthquake that follows a more powerful earthquake in the same area.
9. boundary ____________ occurs where plates push together.
13. ___________ is a process in which one plate is led under another.
14. boundary ____________ occurs where plates move apart.
16. core ____________ is a ball of hot, solid metals.