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Chapter 7, Lesson 1Earth’s Changing Crust
faultgeologistmagma
lavaweathering
erosiondepositionsurveyorelevation
seismographtension
compressionshear
fault – a crack in the Earth’s crust
geologist – scientists who study Earth
magma – hot, molten rock beneath the earth’s surface
lava – magma that reaches the earth’s surface
weathering – the breaking down of the materials of the
earth’s crust
Click on this picture to explore different types of weathering.
erosion – is the picking up and carrying away of weathered
pieces of earth
deposition – the dropping of bits of rock
surveyor – people who measure the earth
elevation – the height of land above sea level
seismograph – a device used to measure vibrations of the Earth’s
crust
tension – stretches or pulls the Earth’s crust apart
compression – squeezes or pushed the Earth’s crust together
shear – twists, tears, or pushes one part of the crust past another