2019
When melted rock reaches the earth's surface it is called
Lava
rocks formed from melted rock is called
igneous rocks
Tsunamis occur when
earthquakes occur in the water
Gems are
minerals that can be cut and polished
Light colored rocks are
Granatic rocks
They determine the strenght of an earthquake
seismologists
Define Fault
A break in the Earth's crust
Landslides can also cause...
Tsunamis
Tsunamis travel at speeds of....
700 to 800 km a hour
how do extrusive igneous rocks form?
when melted rock material cools on the Earth's surface.
A mountain of magma?
volcano
The point were rocks break and move?
Focus
rocks that go trough stress cause
series of ground movement
what are rocks?
solid substance made from two or more minerals.
Magnitude is...
the measure of the enrgy releases by an earthquake
Volcanoes made of mostly cinders and other rock particles that have been blown into the air are called...
cinder cone volcanoes
Tsunamis can reach heights of
20 meters
what are dark colored rocks
Basaltic rocks
what brings diamonds to the earths crust?
Volcanic eruption
How much over sea level is the Mauna Lao?
4km over sea level
what can cause breathing problems in local economies
Volcanic ash,dust, and gases
what is a rock cycle?
A model to show how different kinds of rock relate to one another
composite volcanoes are built up of...
layers
sedimentary rocks are
rocks that come in layers
Gems are hard to find?
Because they form in special conditions