18 terms

Unit 2 Chapter 1 science vocabulary

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Crust
the outermost layer of Earth that floats on the mantle.
Mantle
the layer of Earth between the crust and the core.
isostasy
the balance between the downward force of the crust and the upward force of the mantle.
convection currents
movement created due to warm material rising and cool material sinking.
stress
the forces that push and pull on Earth's crust, causing deformation.
deformation
the breaking, tilting, and folding of rocks.
compression
pushes the rocks of the crust together.
tension
pulls the rocks of the crust apart.
shearing
pushes rocks of the crust in opposite, horizontal directions.
fault
a break along which rocks move.
normal fault
tension causes the hanging wall to move down relative to the foot wall.
reverse fault
compression causes the hanging wall to move up relative to the foot wall.
thrust fault
compression causes the hanging wall to move up and over the foot wall.
lateral fault
shearing causes the blocks of rock to move horizontally past each other.
fold
a bend in a rock.
anticline
an upward fold in a rock.
syncline
a downward fold in a rock.
dome
an uplifted area caused by rising magma.