| A | B |
|---|
| fluid | This is either a gas or a liquid |
| convection currents | The mantle and outer core of the Earth both have these. |
| continental crust | This layer is mostly made of granite. |
| oceanic crust | This layer is mostly made of basalt. |
| pressure | This is the reason why the inner core is solid even though it is extremely hot. |
| magnetic field | The currents in the outer core create this. |
| lithosphere | This layer is made of the crust and the upper mantle. |
| asthenosphere | This layer is soft like taffy. |
| outer core | This layer is made of liquid metal |
| inner core | This layer is made of solid metal. |
| seismic waves | The speeds and paths of these have taught scientists about Earth's interior. |
| rock samples | Direct evidence used by scientists to study Earth's interior. |
| heat transfer | The movement of energy from a hotter to cooler object. |
| radiation | Heat transfer from the sun is considered this type of heat transfer. |
| conduction | A pot on a stove is an example of this type of heat transfer. |
| convection | This type of heat transfer only occurs in fluids. |
| temperature | This increases the deeper you go into Earth |
| density | This is what causes hot fluids to rise and cold fluids to sink. |
