17 terms

Houghton Mifflin Science Grade 4 Chapter 8 Lesson 2

STUDY
PLAY

Terms in this set (...)

EARTHQUAKE
A sudden movement of the Earth's crust
FAULT
A crack in the Earth where earthquakes often happen
PRESSURE BUILT UP IN EARTH'S CRUST
The cause of an earthquake
LANDFORMS
This can be created from rock moving near Earth's surface during an earthquake
MOUNTAINS, VALLEYS, NEW FAULTS
These are kinds of landforms that can form after an earthquake
VOLCANO
An opening in Earth's crust
MAGMA
Molten rock beneath Earth's surface
LAVA
Molten rock that reaches Earth's surface when a volcano erupts
HIGH TEMPERATURES
What causes rocks in Earth's mantle to become magma
IGNEOUS ROCK
As magma rises to the surface, some hardens and becomes this
LANDSLIDE
A sudden movement of loose rock and soil down a steep slope
MUDSLIDE
When soil in a landslide soaked with water too
EARTHQUAKES
VOLCANIC ERUPTIONS
HEAVY RAIN
SUDDEN MELTING SNOW
WILDFIRES
What 5 things can cause landslides & mudslides?
EARTHQUAKE
LANDSLIDE
VOLCANO
Three ways Earth's surface can rapidly change
BURN ALL THE TREES. WITHOUT TREES, SOIL ISN'T HELD IN PLACE, SO IT CAN EASILY CAUSE LANDSLIDE
What effect might a wildfire have on a mountain
MAGMA IS BENEATH, LAVA REACHES THE SURFACE OF EARTH
Difference between magma & lava
MOUNTAINS PUSHED UP
VALLEYS FORM
NEW FAULTS MAY FORM
Three effects an earthquake may have on the landscape

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