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55 Cards in this Set

  • Front
  • Back
Earth is made up of four ---.
layers
The innercore is made up of
--- and ---.
iron and nickel
The --- is the thickest layer of Earth.
mantle
Which layer of the Earth is made up of hot liquid metal?
the mantle
Which layer of the Earth is at the very center of Earth?
the inner core
Which layer of the Earth is the thickest?
the mantle
The Earth is --- miles in diameter
8,000 miles
The --- is made up of many kinds of rock, such as granite, sandstone, and marble.
crust
The --- is very hot at about 9,000 degrees F.
mantle
The --- is about 1,800 miles thick.
mantle
The --- is about 20 miles thick in most places, but it can be as little as 5 miles thick.
crust
The inner core is --- rock because it is under so much pressure from above.
solid
The surface of Earth is made up of large sections called
---.
plates
--- move toward each other, away from each other, or past each other.
Plates
Many of Earth's features are formed by the motion of ---.
plates
The plates --- on the hot liquid rock of the mantle below them.
rest
Most plates move from --- to
--- a year.
1/4 inch to 4 inches
The line where two plates pass each other is called a
---.
fault
The Eurasian, the African, and the South American --- are three of the major of Earth.
plates
It takes millions of years for --- to form.
mountains
Mountains can be formed when plates that make up Earth's crust ---.
move
What kind of mountain is formed when rocks break into blocks?
fault-block mountains
What kind of mountain is formed when a plate bulges?
a dome-shaped mountain
What kind of mountain is formed when lava cools and piles up?
a volcanic mountain
What kind of mountain is formed when the crust folds to form peaks?
a fold mountain
Most mountains are formed in groups called ---.
ranges
Dome-shaped mountains are usually --- mountains.
low
Mountains in ranges usually have about the same ---.
shape
The longest mountain range in the world is the ---.
Andes
Fault-block mountians are formed when broken rock is
--- along a fault line.
pushed up
A --- is a shaking of the surface of Earth.
earthquake
A --- is the place where two plates meet.
fault
Most earthquakes are caused by the sudden movement of --- along a fault.
plates
A tsunami is a giant ---.
wave
Above one --- earthquakes happen every year.
million
Most earthquakes are too --- to notice.
small
A fault is the place where two --- meet.
plates
In a --- earthquake, the ground can shake violently and even spilt open.
strong
When the plates move, the crust near the --- is squeezed and stretched.
fault
The --- is ually less than 25 miles below the surface.
focus
The --- is directly above the focus on the crust.
epicenter
The Ring of Fire is a chain of --- zones and volcanoes that circles the Pacific Plate.
earthquake
When the plates of Earth collide, sometimes a --- is formed.
volcano
In a quiet eruption, --- flows slowly out of the volcano.
lava
A volcanic rock about the size of a golf ball is called a ---.
cinder
A cinder --- is made when a volcano erupts violently and throws cinders out the top.
cone
A --- volcano is formed when cinderes make up some layers and lava flows make up other layers.
composite
A --- is an opening in a volcano.
vent
When a vent is plugged, --- builds up inside the volcano.
pressure
IN a hot spring, hot water and --- escape from the ground.
steam
Hot springs are sources of
--- energy.
geothermal
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