Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
science exam
things i need to know for the science test
| Question | Answer |
|---|---|
| what is sea floor spreading | the process by which molten material adds new oceanic crust to the ocean floor. |
| what is a deep ocean trench? | A deep valley along the ocean floor where oceanic crust is slowly sinking under the mantle |
| What is tension? | stress that stretches rock so that it becomes thinner in the middle |
| what is a transform boundary? | A plate boundary where two plates slide past each other |
| What is a convergent boundary? | A plate boundary where two plates move towards each other. |
| What is the only LIQUID layer of the Earth? | the outer core. |
| Explain Wegener's theory of continental drift. | the continents were once all connected in a supercontinent called Pangea, but broke apart forming the continents we know today, 200 million years ago. |
| what were the three pieces of evidence Wegener Used to support his theory? | Fossils, land features, and climate. |
| what is the lithosphere | A rigid layer made up by the uppermost part of the mantle and the crust. |
| Where do most of volcanoes and earthquakes form? | Along the ring of Fire. |
| What is the difference between quiet and pyroclastic eruptions | Quiet tends to be thicker magma that just seeps out and pyroclastic tends to be thinner magma and a more explosive eruption. |
| What is the difference between P waves and S waves | P Waves compress and expand, s waves move from side top side |
| what state of matter is the Asthenosphere? | Semi liquid |
| What is a divergent boundary | A plate boundary where two plates move away from each other |
| How does Silica influence the type of eruption in the volcano? | If it is thick magma, it will most likely be a quiet eruption, if it is thin, it will most likely be a pyroclastic eruption. |
| what are the main layers of the Earth? | Crust, mantle, outer core, inner core |
| Explain the force that causes plates to move. | Convection currents in the mantle. |
| describe a dike | A slab of volcanic rock formed when magma forces itself past rock layers |
| What is shearing | A stress that pushes masses of rock in opposite directions |
| What is pangea | the supercontinent that broke apart 200 million years ago |
| What causes volcanic ranges to form at a subduction zone? | The sea floor spreads and magma steeps through the crack in the earths surface. |
| What is a mid ocean ridge? | A undersea mountain chain where new ocean floor is produced |
| What is a hot spot? | An area where magma from deep within the mantle melts through the crust above it. |
Created by:
yeahh
Popular Earth Science sets