1
When plates push and pull, cracks called _____ form in the crust.
faults
a bend in the rock layers
fold
a giant wave caused by the Earth's crust lifting suddenly
tsunami
melted rock outside of a volcano
lava
When the mantle starts to flow, the Earth's plates ___.
move
high landform with a flat top
plateau
List two places that earthquakes are common.
California and Alaska
melted rock inside of a volcano
magma
when land keeps scrunching mountains called _____ form
folds
the sudden shaking of the Earth's crust
earthquake
Which part of California has a lot of earthquakes because it is located on an active fault?
San Francisco
vibrations caused by earthquakes
seismic waves
rocks on either side of the fault slide up or down
fault-block mountain
During an earthquake, energy is released and can travel for _____________ of miles.
hundreds
What detects and records earthquakes?
a seismograph
places where the Earth's crust is very thin
hot spots
Earth's plates are made of:
1.
2.
1. the crust and
2. the upper part of the Earth's mantle.
What causes an earthquake?
the sudden movement along a fault
How do volcanoes form?
two plates meet, one sinks, and the plate gets hotter
Earth's plates move apart allowing magma to rise to the surface
Name four things that a volcanic eruption can send into the air.
melted rock, gases, ash, rocks