Unit 2- The Lunar Disc

Question 1

Give: how mountains were formed and an example of a mountain range on the Moon

Answer 1

1.) Formed by meteor impact and the movement of tectonic plates
2.) Apennine mountains

Question 2

Give: Another name for valleys and how they were formed

Answer 2

1.) They were formed by lava flow
2.) Also known as rille

Question 3

Give: Another name for highlands and what they are

Answer 3

1.) Also known as terra/ terrae
2.) They’re the light grey rocks and are heavily cratered

Question 4

Give: another name for seas, and how they’re made

Answer 4

1.) Made from basalt from volcanic eruptions
2.) Also known as mare or maria

Question 5

What are rays of ejecta?

Answer 5

Splattered material from collisions

Question 6

How are craters formed?

Answer 6

Formed by meteor impacts

Question 7

What does it mean for the moon and the earth to be “tidally locked”?

Answer 7

The moon rotates in the same time it takes to orbit the earth

Question 8

How long does it take for the moon to orbit on its axis?

Answer 8

27.3 days

Question 9

What percentage of the moon can you see due to libration?

Answer 9

59 percent

Question 10

What is the effect and cause of SEEING CONDITIONS?

Answer 10

Effect: The stars “twinkle”
Cause: Convection currents in the atmosphere

Question 11

What is the cause and effect of LOCAL GLARE

Answer 11

Effect: Can’t see faint stars because the retina is not allowed to increase sensitivity
Cause: Glare from stadium lights

Question 12

What is the effect and cause of SKYGLOW?

Answer 12

Effect: Can’t see faint stars
Cause: There is reduced contrast between the sky and the stars

Question 13

What is the effect and cause of SKY COLOUR?

Answer 13

Effect: Can’t see faint stars
Cause: Blue light is scattered so there is smaller contrast between the sky and the stars