Himalayas - a mountain range in Asia, Appalachians - a mountain range in the eastern part of the United States, Alps - a mountain range in Europe, Andes - a mountain range in South America, farenheit - a measurement of temperature, mainly used in the United States, plates - large section of the Earth's crust, strata - layers of rock, crust - the top layer on the surface of the Earth, magma - molten rock, called lava when it reaches Earth's surfaces, vents - cracks in the Earth's crust where lava comes out,

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