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Science

9th - 10th Grade

Used 9+ times

The History of Planet Earth
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25 questions

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1.

MULTIPLE CHOICE QUESTION

20 sec • 1 pt

How long ago was the earth formed?

4.5 billion years

5 million years

7 billion years

3.7 million years

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What process moves the continents across the surface of the Earth?

mantle movement

earth quakes

volcanic activity

continental drift

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The interior of the Earth is still molten, reaching _____________ degrees Celsius in the core.

10,000

5700

4700

2000

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What created earth's magnetic fields?

convection currents in the mantle

convection in the molten inner core moving beneath the mantle

movement of the molten outer core surrounding the iron inner core

conduction in the lithosphere moving rare earth minerals

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Where did earth's oxygen come from?

the atmosphere

photosynthetic cyanobacteria

chemical breakdown of minerals

redox reactions

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Earth's atmosphere is ___________ % nitrogen and ___________% oxygen.

78%, 21%

82%, 17%

54%, 45%

71%, 28%

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Continental crust is recycled more often than oceanic crust.

true

false

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