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Chapter 5
earth science
26
Science
3rd Grade
10/04/2012

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Term
earthquake
Definition
the sudden movement of rocks in Earth's crust
Term
volcano
Definition
a mountain that builds up around an opening in Earth's crust
Term
lava
Definition
melted rock that flows out of a volcano
Term
magma
Definition
melted rock inside Earth's mantle and crust
Term
crust
Definition
the Earth's outer layer
Term
mantle
Definition
the layer below the Earth's crust
Term
core
Definition
the deepest and hottest layer of Earth, in the center
Term
erosion
Definition
the movement of weathered rock sometimes caused by moving water, glaciers, or wind
Term
weathering
Definition
the slow process of breaking down rocks into smaller pieces
Term
landform
Definition
a natural feature of land
Term
continents
Definition
seven great areas of land on earth
Term
landslide
Definition
a rapid movement of rocks and soil down a hilll
Term
canyon
Definition
is a deep narrow, valley with steep sides. They often have rivers flowing through them
Term
ocean
Definition
a large body of salt water
Term
3/4 of the Earth's surface is covered with
Definition
water
Term
The three layers of the Earth
Definition
crust, mantle, and core
Term
floods
Definition
large amounts of water cover normally dry land.
Term
rapid changes to the land
Definition
earthquakes, volcanoes, and floods
Term
slow changes to the land
Definition
weathering, erosion, and glaciers
Term
creep
Definition
the slow movement of soil down steep hills
Term
mountain
Definition
a place that is much higher than the land around it.
Term
Barrier Island
Definition
a thin band of land near the coast
Term
canyon
Definition
has very steep sides
Term
plain
Definition
a flat area of land
Term
plateau
Definition
a flat mountain
Term
valley
Definition
a low area with high sides
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