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plate tectonics
| Question | Answer |
|---|---|
| A subducted plate melts, forming ____. | magma and volcanic mountains |
| The hypothesis that continents have slowly moved to their current locations is called | continental drift |
| Plates slide past one another at ____. | transform boundaries |
| Oceanic plates are more dense than continental plates. true or false? | true |
| In order to complete a convection current, the rising material must eventually ____ Earth. | cool and sink back into |
| Continental plates are primarily covered by a landmass. true or false? | true |
| When ocean plates collide with continental plates, the denser ocean plate ____. | sinks |
| what type of plate boundary is The Himalayan Mountains and Tibetan Plateau | convergent |
| what type of plate boundary is The central and southern coast of California | transform |
| what type of plate boundary is The Mid-Ocean Ridge | divergent |
| what type of plate boundary is The Rocky Mountains | convergent |
| what type of plate boundary is The Mariana Trench | convergent |
| At an oceanic-oceanic convergent plate boundary, the older crust is ____. | the older crust is recycled by subduction |
| Scientists believe that differences in ____ cause hot, magma in the asthenosphere to rise toward Earth's surface. | density |
| Continental drift states that continents have moved ____ to their current location. | slowly |
| Ocean floor plates are ____ than continental plates. | thinner |
| Scientists have observed that the continents move apart or come together at speeds of a few centimeters per ____. | year |
| ____ are formed when two continental plates collide. | mountain ranges |
| The driving forces of tectonic plates are related to convection currents in Earth’s ____. | mantle |
| Seafloor spreading occurs because ____. | new material is being added to the oceanic crust |
| The result of plate movement can be seen at ____. | plate boundaries |
| Features found at divergent plate boundaries include ____. | mid-ocean ridges |
| ____ currents inside Earth might drive plate motion. | convection |
| Crust is neither destroyed nor formed along which of the following boundaries? | transform |
| The crust under the continents is thinner than the crust under the ocean. true or false? | false |
| A fault is ____. | a fracture(break) in the Earth where movement has occurred |
| A ____ is created where one plate moves under another. | subduction zone |
| The Hawaiian Islands were formed when the Pacific Plate moved over ____. | a hot spot |
| Oceanic plates are primarily covered by oceans. true or false? | true |
| According to the theory of continental drift, it is believed that the continents were assembled as part of a supercontinent called | pangaea |
| Crustal plates float on the ____. | mantle |
| Plates move apart at ____ boundaries. | divergent |
| Continental plates are more dense than the oceanic plates. true or false? | false |
| What are the three sources of the Earth’s internal heat energy that drives convection in the mantle? | collisions while earth was forming, radioactive decay of elements, gravitational energy converted to heat energy |
| Convection currents cannot take place without ____. | heat |
| The youngest part of the ocean floor is found ____. | near the mid-ocean ridges |
| Earthquakes and volcanoes are concentrated near plate boundaries. true or false? | true |
| What are four pieces of evidence used to support the theory of continental drift? | ex: continent puzzle pieces, fossils, rocks, mountain ranges, etc. |
| The Himalayan mountain range of India was formed at a ____. | convergent boundary |
| Why are there so many volcanoes along the western edge of the US but none on the eastern edge of the US? | there is no plate boundary near the east coast |
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