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Flashcards in Earth Deck (23):
1

What is the most dense planet in our solar system?

Earth

2

How much of Earth's surface is covered in water?

70%

3

Which of the following has the strongest tidal effect on Earth?

The moon

4

What is at the center of the earth?

The heaviest elements

5

Convection in the ___ causes weather on Earth.

troposphere

6

What other planet has about a 24 degree tilt on its axis just like Earth?

Mars

7

What is the average air pressure on the surface of the Earth?

14.7 pounds per square inch

8

Choose the second-most abundant gas in Earth's atmosphere:

Oxygen

9

What two principal gases make up Earth's atmosphere?

Oxygen and Nitrogen

10

When did Earth's secondary atmosphere first appear?

4 billion years ago

11

Besides heating from sunlight, what else contributes to the Earth's average temperature being higher than one would expect?

Carbon dioxide (and other gases) in the atmosphere cause a greenhouse effect.

12

The Earth's interior is not uniform. The materials have been separated by density through a process known as _____?

Differentiation

13

What are the layers of Earth in order from the innermost layer to the outermost layer?

Inner core, outer core, mantle, crust

14

What differentiates the surfaces of the Earth and the Moon?

Earth has volcanoes and mountain ranges, whereas the Moon has craters.

15

The center of the earth is about the same temperature as:

The surface temperature of the Sun

16

Where did the heavy elements that make up the bulk of the earth originate?

In a supernova

17

What is the geological process that explains the movement of continental and oceanic plates, which cause earthquakes?

Plate Tectonics

18

How do you measure the density of Earth?

Mass/volume

19

The mass of the earth is made up mostly of which two elements?

Iron and Oxygen

20

What are earthquakes fueled by?

Energy from the Earth's core

21

How many degrees warmer is Earth with the greenhouse effect?

33 degrees

22

What is the geological process that explains the movement of continental and oceanic plates, which cause earthquakes?

Plate Tectonics

23

What causes the magnetic field found on Earth?

Electric currents created by the flow of molten iron in the outer core