Science Terms

5. Two plates that move together is called __________ boundaries
7. These cause grooves in the Earth’s bedrock as they move outward
8. Two plates that slide past each other is called _________ boundaries
10. Scientists who rejected Wegener and didn't believe his theory were thought of as
11. Who mapped the seafloor with sonar
14. How many types of sonar are there
16. Two plates that move apart is called _________ boundaries
17. Listening for vessel sounds is called _______ sonar
19. When an oceanic plate goes underneath a continental plate it is called
20. Provides heat in the Earth and is the innermost layer

1. Name of the Earth's most recent supercontinent
2. Who proposed the continental drift theory
3. Near the ends of continental plates were
4. At the middle of the Atlantic was a ________ range
6. Massive shaped slabs of solid rock in the lithosphere
9. It is the liquidy part of the Earth and it rises at mid ocean ridges
12. The closer to the ridge the _____ the rock
13. Sending out pulses and measuring return speed is called ______ sonar
15. Outermost level of the Earth that gets pushed apart as less dense materials rise
18. The acronym for this is Sound Navigation And Ranging