Ohio 4th Grade Harcourt Science Vocabulary--Changes to Earth's Surface

Ohio 4th Grade Harcourt Science Vocabulary--Changes to Earth's Surface
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landform
a natural feature on Earth's surface
mountain
an area that is higher than the land around it
topography
the shape of landforms in an area
hill
looks like mountains, but are smaller
valley
lower area with higher land around it
canyon
a valley with steep walls
plain
large, flat landform
plateau
a flat area that is higher than the land around it
delta
form at the end of rivers where bits of soil and rock are deposited
dune
form in dry areas or sandy coasts where wind carries sand
island
a body of land completely surrounded by water
volcano
a mountain that forms as lava flows through a crack onto Earth's surface
earthquake
the shaking of Earth's surface caused by movement of rock in the crust
deposition
the dropping of bits of rock and soil by a river as it slows
glacier
a large, moving block of ice
fossil record
the information about Earth's history that is contained in fossils
river
running water that follows a definite path due to the banks
wind
slams sand against rocks and causes erosion
waves
crash into rocks, soil, sand and carries particles away
crust
Earth's thin outer layer
mantle
rock layer below the crust
core
Earth's center
plates
large slabs of rock that float on a layer of mantle that can flow like taffy
magma
melted rock found inside the Earth
lava
molten rock that reaches the surface and comes out onto the Earth's crust
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