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Flashcards in Mercury Deck (20):
1

Why is the atmosphere of Mercury so thin?

There is too little gravity to hold it down

2

How long does it take Mercury to completely orbit the sun?

88 Days

3

Mercury is the______ planet in our solar system.

Smallest

4

Mercury's orbit is...

More elliptical than Earth’s

5

What is a scarp?

Cliffs on the surface of Mercury

6

Which planet is also as geologically dominated by impact craters as the Moon?

Mercury

7

What is the closest planet to the sun in our solar system?

Mercury

8

Mercury has a large, iron-rich core.

True

9

Other than Earth, which is the only terrestrial planet with a significant magnetic field today?

Mercury

10

Mercury has __% the gravity of Earth.

38

11

How long is a day (noon to noon) on Mercury?

30 Earth days

12

Mercury is the second densest planet following:

Earth

13

What are scarps on Mercury?

Cliffs caused by the collapse of Mercury's crust

14

Mercury is a terrestrial planet. What is a terrestrial planet primarily composed of?

Rock

15

How many astronomical units (AU) is Mercury from the Sun?

0.38 AU

16

Why does Mercury have scars on its surface?

Crust material compressed in on the core below as it cooled.

17

Which statement is true?

Mercury has shorter years, longer days

18

Because of its inability to "self-heal" the surface of Mercury is covered in:

Craters

19

Mercury's surface is covered in craters. How were these craters formed?

Comets/asteroids

20

What is Mercury's highest surface temperature?

840 F