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The Earth
key terms for basic geography of the earth's structure
| Term | Definition |
|---|---|
| plate | section of the earth's crust |
| semi molten | thick fluid |
| mantle | layer beneath the earth's crust |
| crust | outside layer of the earth, made up of solid rock |
| core | centre of the earth, hottest part, made up of iron and nickle |
| continental drift | plate movement due to convection currents |
| plate tectonics | the study of the movement of the earth's plates |
| pangaea | super continent, one landmass 225 million years ago, over time continental drift separated the plates |
| magma | semi molten liquid in the earth's mantle |
| boundary | edge of a plate |
| convection currents | hot air rises, cool air falls creating a pull |