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Plate Tectonics Test
Unit Review For Period 6/7
| Question | Answer |
|---|---|
| The crust and upper mantle make up what part of the Earth? | lithosphere |
| Where is the youngest material of the ocean floor found? | in the mid-ocean ridge |
| What do we call the layer below the lithosphere? | asthenosphere |
| What mountain range is being formed while the Indian and Asian continents collide? | Himalayas |
| The Continental Drift Theory was first proposed by? | Alfred Wegner |
| What is the name of the process where one plate goes back into the earth to be recycled? | subduction |
| What type of boundary has plates moving toward each other? | convergent |
| What type of boundary has plates moving away from each other? | divergent |
| A place where diverging boundaries are found on the Earth is at the... | mid-ocean ridge |
| What is the name of the Super Continent, proposed in 1915, that was considered to be "all land"? | PANGAEA |
| The main force behind the movement of the plates is thought to be what type of heat transfer, within the mantle? | concection |
| What geologic feature forms when two continental plates converge? | mountains |
| Continental plates are _____________ than ocean plates. | less dense |
| Oceanic plates are _______________ than continental plates. | more dense |
| Magma's cycle of heating, rising,cooling, and sinking is due to differences in what? | temperature and density of the molten material |
| Why does seafloor spreading occur? | molten material in the mantle rises to the surface |
| What are three things that occur at plate boundaries? | earthquakes, mountains, and volcanoes |
| As the distance from a mid-ocean ridge increases, the rock gets... | older |
| The volcanic mountains of Mount St. Helen's were formed at what type of boundary? | convergent |
| Additional evidence of seafloor spreading included alternating bands of _______ on either side of the mi-ocean ridge. | magnetism |
| Studies of earthquake waves have helped scientists determine what? | structure of the Earth's interior |
| The coastline of South America and Africa have matching fossils within the same series of rock layers. What does this prove? | the plates were once joined together as one landmass |
| What theory is used to explain the movement of crustal plates? | Plate Tectonics |
| What geologic events can occur at plate boundaries? | earthquakes, mountain formations, volcanoes |
| All rocks are composed of? | minerals |
| Rocks are classified as igneous, sedimentary, or metamorphic according to... | how they were formed |
| Why does ice wedging result in weathering? | water expands when it freezes, breaking rock |
| Movement along Earth's crust, along plate boundaries can causes what geologic movement? | earthquakes |
| If a large rectangular rock was thrown into a stream, what would it look like after being carried hundred of miles downstream? | smaller and rounded |
| What type of rock is formed by melting and solidification of magma? | igneous |
| What type of rock is formed by deposition, compaction, and cementation of sediments? | sedimentary |
| What type of rock is formed by heat and/or pressure of other rocks? | metamorphic |
| What feature of our continents suggests that they were once joined together? | some continents fit together like puzzle pieces |
| If you looked at several strata (layers) of rock, where would the oldest rock be found? | on the lowest/bottom layer |
| If you looked at several strata (layers) of rock, where would the youngest rock be found? | on the highest/top layer |
| Why do some parts of the world have more earthquakes? | Those places are located on a plate boundary. |
Created by:
Mr.McKeehan
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