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earth science
earth science flashcards
| Question | Answer |
|---|---|
| What is the soft layer of the upper mantle? | The Asthenosphere |
| What does the crust and upper mantle make up? | The Lithosphere |
| What are the three types of heat transfer? | Radiation, convection, and conduction. |
| Where does subduction take place? | The deep ocean Trench |
| What are the four main layers of the Earth? | Crust, Mantle, Outer and Inner core |
| What are the three types of plate boundaries? | Divergent, Convergent, and transforming Boundaries |
| What evidence did geologists use to study the structure of Earth? | Rock Samples |
| Why are there convection currents in the mantle? | Heat from the core and mantle make the magma sink and rise or melt and harden going in a cycle. |
| What happens when an oceanic and continental plate collide? | The denser plate sub-ducts |
| What happens when two plates of oceanic crust collide? | It causes underwater volcanoes |
| What happens when two plates of continental crust collide? | It forms mountains |
| What force do geologists think caused plate tectonics? | Convection currents in the mantle was the cause |
| What evidence did Wegner use to support his theory of Continental Drift? | The shape of the continents, the fossils found on different continents, and the change in weather. |
| What is a sonar? | Its a device used to map the ocean floor. |
| What is Sea floor Spreading? | A process that continually adds new material to the ocean floor. |
| What's the mid ocean ridge? | It's a chain of underwater mountains. |
| What's subduction? | Its the ocean floor sinking beneath the deep ocean trench and back into the mantle. |
| What is a Plate? | A section of the lithosphere that slowly moves over the asthenosphere carrying pieces of continental and oceanic crust |
| What is a scientific theory? | A well tested concept that explains a wide range of observations. |
| What is a Fault? | A break in the Earth's crust where masses of rock slip past each other. |
| How does the process of sea floor spreading work? | 1,Magma erupts.2,Magma cools, and pushes old rock aside. |
| What is a rift valley? | Its a deep valley which forms when two plates move apart. |