Mountains 2
Terms
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- 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
- Q
- A