Landslide
the force that pulls objects toward Earth’s
center.
Gravity
Hot ash and lava released during an eruption
may quickly bury or destroy nearby_____
forests, fields, and towns.
Powerful earthquakes can damage...
buildings and other structures.
Roads buckle, railroad tracks twist, and
bridges collapse.
Water pipes and electric power lines break.
In places where the ocean is deep, tsunami waves may be only a few ____ high.
centimeters
moving to safer areas is also called____
evacuation
Rock on a ledge or steep hill may suddenly break loose and..
fall
Sometimes the lava flows down the side of the volcano and hardens into____.
rock
If the slabs break free, energy is released and moves through the rocks. This makes the ground
shake or move!
As the waves approach shore, they increase in...
height.
Scientists use a system of floating devices called _____ to measure changes in the depth of ocean water.
buoys
Heavy rains, Volcanoes and earthquakes can...
cause landslides
Magma that erupts onto Earth’s surface is called
lava.
How many earthquakes occur every year?
Several Million
A tsunami is a series of fast-moving....
Seismometers measure _______ activity.
earthquake
If enough material falls, the shape of the hill or
mountain may
change
Volcanoes form when ______, or melted
rock inside Earth, rises to the surface.
magma
An earthquake is a natural process caused by the movement of parts of
Earth’s surface.
Tsunamis can be caused by...
an earthquake, or an underwater volcanic eruption, or a landslide.
Engineers can design buildings and bridges to withstand the violent shaking of____
earthquakes.
a rapid movement of rock, soil, and other material down a hill or mountain.
A landslide
Volcanoes may also release poisonous_____.
gases
a break in Earth’s surface where huge slabs of rock slip past, move away from, or push against each other is a...
fault
When a large tsunami smashes into land, its turbulent water can destroy...
houses, roads, and other structures
Natural hazards cannot be _________, but people can take steps to reduce their impact. ]
eliminated