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Earth's Structure
Question | Answer |
---|---|
What are the four layers of the earth called? | The crust, mantle, outer core and inner core. |
What are the two types of crust? | Ocean crust and continental crust. |
What is the crust divided into? | It is divided into plates. |
What is in the mantle? | Molten(melted) magma. |
how hot is the core? | Between 3,000 degrees Celsius and 5,000 degrees Celsius. |
What are boundaries? | Boundaries are the line or edge where the plates meet. |
What causes the plates to move? | Convection Currents in the mantle cause them to move. |
What are convection currents? | Convection currents are the movement of magma in the mantle. |
What happens when plates collide? | Earthquakes, fold mountains and volcanoes. |
What happens when plates separate? | Mid- ocean ridges, volcanoes and earthquakes. |
What happens when plates slide past each other? | Earthquakes. |
What is the continental drift theory? | It is the theory that all the continents were once joined together to form a super continent. |
What was this super continent called? | Pangaea. |
Who created the continental drift theory? | Alfred Wegener. |