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Geography Key Terms
#2 Our Planet
Question | Answer |
---|---|
orbit | path one object makes as it circles around another |
revolution | circular journey around the sun |
axis | imaginary line running through Earth between the North and South Poles |
equinox | point at which, everywhere on Earth, days and nights are nearly equal in length |
solstice | point at which days are longest in one hemisphere and shortest in another |
rotation | complete turn |
time zones | areas sharing the same time |
core | sphere of very hot metal at the center of the Earth |
mantle | thick, rocky layer around Earth's core |
crust | thin layer of rocks and minerals that surrounds Earth's mantle |
atmosphere | thick layer of gases or air |
landforms | shapes and types of land |
weathering | process that breaks rocks down into tiny pieces |
erosion | process in which water, ice, or wind remove rock and soil |
deposition | process of depositing material eroded and carried by water, ice or wind |
plains | large area of flat or gently rolling land |
plateau | large, mostly flat area that rises above the surrounding land |
valley | stretch of low land between mountains or hills |
delta | a flat plain formed on the seabed where a river deposits material over many years |
plate tectonics | theory that explains how huge blocks of Earth's crust called "plates" move |
plate | block of rock and soil that makes up Earth's crust |
magma | stream of soft, nearly molten rock |
faults | seam in Earth's crust |