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Astronomy Units 5 and 6

Total questions: 20

Worksheet time: 10mins

Name
Class
Date
1.

Earth is the ___ Largest Planet

a)

3rd

b)

5th

c)

7th

d)

1st

2.

What Percent of Water Covers Earth?

a)

70%

b)

47%

c)

99%

d)

83%

3.

How Much of the Atmosphere is Oxygen?

a)

39%

b)

100%

c)

21%

d)

79%

4.

Which Two Planets Are Closest to Earth?

a)

Mars, Mercury

b)

Mars, Venus

c)

Neptune, Mercury

d)

Jupiter, Saturn

5.

About How Many Planets May Be in Habitable Zones Near Other Stars?

a)

100 million

b)

547 thousand

c)

30 trillion

d)

40 billion

6.

About How Many Days is One Earth Year?

a)

365.26

b)

366.93

c)

364.85

d)

365.92

7.

A _____ is an Object’s Orbit Around a Much Larger Object in Space

a)

Rotation

b)

Spin

c)

Revolution

d)

Circle

8.

A _____ is an Object's Spinning Motion

a)

Rotation

b)

Spin

c)

Revolution

d)

Circle

9.

How Many Hours is One Earth Day?

a)

24 hours

b)

23 hours and 56 minutes

c)

24 hours and 4 minutes

d)

23 hours and 59 minutes

10.

Planetesimal : a Gathering of Dust That Forms a Tiny Planet Around a Star Through ________

a)

Accretion

b)

Impact

c)

Orbit

d)

Revolution

11.

Which Planet is Closest to the Sun?

a)

Venus

b)

Jupiter

c)

Mercury

d)

Mars

12.

What is the Closest Average Approach to Earth From Venus?

a)

27 million miles

b)

25 million miles

c)

64 million miles

d)

45 million km

13.

How Long is One Venusian Year?

a)

56 Earth Days

b)

497 Earth Days

c)

365 Earth Days

d)

224 Earth Days

14.

What is Weird About Venus's Rotation?

a)

It's counterclockwise

b)

It's clockwise

c)

It's too slow

d)

It's too fast

15.

What is Mercury's Radius?

a)

4643 miles

b)

1515 miles

c)

2573 miles

d)

1563 miles

16.

How Long Does it Take for Mercury to Rotate Fully?

a)

58.65 Earth days

b)

36.73 Earth days

c)

374 Earth days

d)

12.3 Earth days

17.

Why is Mercury's Day so Strange?

a)

It rotates clockwise

b)

It rotates counterclockwise

c)

Elliptical orbit

d)

Too close to Sun

18.

Which Planet is Hotter?

a)

Mercury

b)

Venus

c)

Earth

d)

Neptune

19.

What Makes Mercury Not the Hottest if it's Next to the Sun?

a)

Reflects heat

b)

Spins too fast

c)

Too much ice

d)

Venus's clouds

20.

What Year Did Venera 7 Land on Venus?

a)

1987

b)

1970

c)

1984

d)

2000