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WorksheetsEarth structure
Total questions: 10
Worksheet time: 3mins
What is the thickness range of the Earth's crust?
8 to 65 km
100 to 200 km
1 to 5 km
200 to 300 km
What is the main composition of the Earth's mantle?
Silicate rocks rich in iron and magnesium
Pure iron
Nickel and copper
Carbon and hydrogen
At what temperature can the bottom of the Earth's crust reach?
1200°C
5000°C
100°C
2000°C
What is the primary composition of the Earth's core?
Iron with a little nickel
Silicon and oxygen
Carbon and nitrogen
Aluminum and copper
How thick is the oceanic crust?
2-10 km
10-100 km
50-150 km
1-5 km
What is the density of the continental crust?
2.7 grams per cubic cm
3.0 grams per cubic cm
1.5 grams per cubic cm
4.0 grams per cubic cm
How old is the continental crust?
As old as 4.3 billion years
200 million years
1 billion years
500 million years
What type of rock is the oceanic crust primarily made of?
Basalt
Granite
Sandstone
Limestone
What percentage of the Earth's land surface is covered by continental crust?
40%
60%
20%
80%
What geological features are found at plate boundaries?
Earthquakes, volcanoes, and mountain building
Deserts and plains
Rivers and lakes
Forests and jungles
