Astronomy Chapter 3 Section 3

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Why is Mars called the red planet?

Because its surface is reddish in color

Why is Mars red?

Chemical reactions between surface rock and atmospheric oxygen literally rusted the surface.

Why is Venus called Earth's twin?

Earth and Venus are similar in size, and core build up

Why does mercury have extreme temperatures?

It has no atmosphere, so it is hot in day when facing the sun, and as cold as -1113 degrees in the night

How large is Mars?

It is about 6000 kilometers in diameter

What is Venus's atmosphere composed of?

It is made of mostly sulfuric acid

Why is Venus called the "Evening Star"?

It is seen in the night sky, and looks like a star

Why are some of Mars' areas darker than others?

Mars is covered in dust, and it blows away at parts, exposing the terrain, which is darker than the dust.

What are the four inner planets?

Mercury, Venus, Earth, Mars

What are Mars' moons?

Phobos and Deimos

What is the closest planet to the sun?

The closest planet to the Sun is Mercury.

Is there water on Mars?

Yes. There are glacier ice caps in the north and south poles

What would happen if you were on Venus?

You would be crushed by the pressure :)

What is Mars atmosphere composed of mostly?

carbon dioxide

What are Earth's layers?

crust, mantle, core

What is the largest inner planet?

earth

What is the greenhouse effect?

the trapping of the sun's warmth in a planet's lower atmosphere


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