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| Question | Answer |
| How do earthquakes, volcanoes and continental drift all occur? | They occur because of energy flows within our planet. |
| What is tectonic drift? | Tectonic drift is the process by which enormous tectonic plates on the surface of the earth move and collide with each other. |
| What are tectonic plates? | Enormous plates of rock, the size of continents, that make up the Earth's crust and are very slowly moving. |
| What would happen if the whole planet was solid? | If the whole planet was solid, it would be even more difficult to move the plates, and require even more extreme forces. |
| What is the state of the inner layers of the Earth? | The inner layers of the Earth are liquid. |
| What sort of liquid is the inner layer made up of? | The inner layer is made up of molten rock. |
| What is the crust? | The crust is the uppermost thin layer of the Earth. |
| How thick is the crust? | The crust is between 5 and 70km deep over the whole surface of the earth. |
| What is the mantle? | A mantle is the layer of rock between the crust and the outer core of the earth. |
| What is the state of the mantle? | The mantle is almost solid, but is soft enough to allow the slow movement of the plates. |
| What is the outer core? | The outer core is the layer of rock between the mantle and the inner core of the Earth. |
| What is the state of the outer core? | The state of the outer core is liquid. |
| What is the inner core? | The inner core is the innermost layer of the Earth. |
| What is the state of the inner core? | The state of the inner core is solid. |
| What would need to happen in order to melt this huge volume of rock? | It would take enormous amounts of energy to melt this huge volume of rock. |
| What are the two sources energy comes from? | The true sources energy comes from include: -ongoing decay of radioactive substances within the earth -leftover heat from the time when the earth formed. |
| What is the inner core believed to contain? | The inner core of the earth is believed to contain a high proportion of iron as well s possibly large amounts of gold and other precious metals. |
| What is the temperature of the inner core? | The temperature of the inner core is about 5700 degrees. |
| What is the outer core believed to do? | The outer core is believed to rotate at a slightly different rate to the mantle above it, placing forces on the mantle. |
| What else is believed to be within the outer core? | There are also believed to be 'currents' of molten rock moving within the outer core. |
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