Earth in General
Catastrophic Events
Inside Earth
Potpourri
100
How much land is on Earth?
30%.
100
VOLCANO What is magma called when it pours out of a volcano onto Earth's surface?
Lava.
100
What is the middle of the Earth called?
The inner core.
100
How long does it take for Earth to circle around the Sun?
About 365 days.
200
What are lines of weakness in the Earth's crust are?
Fault lines.
200
TSUNAMI How are tsunamis formed?
They are caused by an underwater earthquake, landslide, or volcanic eruption.
200
On top of Earth (what we live on) is called...
The crust.
200
Where is the coldest place on Earth?
Antarctica. The continent is almost covered with ice.
300
How much of earth's surface is made out of mountains?
One fifth = 1/5
300
EARTHQUAKE How many earthquakes occur in the United States each year?
A little over 58,000 earthquakes.
300
How may layers are in Earth?
One liquid and three solid layers.
300
How long does it take to decompose plastic on Earth?
About 500 years.
400
How are mountains formed?
1. By upward movement of Earth's plates. 2. Magma forcing its way up to the surface.
400
TORNADO How many tornadoes (on average) touch down on the United States?
An average of 800 tornadoes every year.
400
What is the inner core made of?
Iron and nickle.
400
How much does Earth weigh?
It is estimated to weigh 6,585,600,000,000,000,000,000 tons.
500
How old is Earth?
About 4.54 billion years old.
500
HURRICANE What is the Taino Native American word for hurricane?
Hurucane. It means "evil spirit of the wind".
500
List the layers of Earth, from top to bottom.
1. Crust 2. Upper Mantle 3. Mantle 4. Outer Core 5. Inner Core
500
What is the biggest river in the world?
The Nile River; its about 3,903 miles long!
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