Which layer of Earth do we live on?
Mantle
Crust
Core
Troposphere
How many main layers does Earth have from surface to center?
3
4
5
6
How thick is Earth's crust under the oceans?
3-5 miles
5-7 miles
10-12 miles
15-20 miles
What temperature is Earth's inner core?
4,000°F
7,000°F
9,000°F
11,000°F
Which layer of Earth is liquid?
Inner Core
Outer Core
Lower Mantle
Upper Mantle
What percentage of Earth's volume is the mantle?
0.54
0.84
0.32
0.67
What is the thinnest layer of Earth?
Crust
Mantle
Outer Core
Inner Core
What is the main substance that makes up Earth's inner core?
Gold
Iron
Diamond
Platinum
How deep is Earth's mantle?
1,800 miles
2,900 miles
1,200 miles
3,200 miles
Which layer of Earth contains tectonic plates?
Inner Core
Outer Core
Mantle
Crust
What is the pressure at Earth's center?
1 million psi
3 million psi
4 million psi
2 million psi
What state of matter is Earth's mantle?
Liquid
Solid
Gas
Plasma
How old is Earth's inner core?
1 billion years
2 billion years
3 billion years
4 billion years
What causes Earth's magnetic field?
Inner Core
Outer Core
Mantle
Crust
Which layer of Earth is the hottest?
Mantle
Outer Core
Inner Core
Crust
What percentage of Earth is the core (inner and outer combined)?
0.15
0.25
0.35
0.45
What is the approximate thickness of continental crust?
15-20 miles
20-30 miles
30-40 miles
40-50 miles
What is the main mineral in Earth's mantle?
Quartz
Olivine
Feldspar
Granite
How fast does the outer core move?
5 mph
10 mph
15 mph
20 mph
What percentage of Earth's mass is in the core?
0.23
0.33
0.43
0.53
