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OUR SOLAR SYSTEM

Total questions: 15

Worksheet time: 8mins

Name
Class
Date
1.

The sun consists of __________ % of the mass in our solar system.

a)

99%

b)

75%

c)

50%

d)

10%

2.

Earth is found in a region of space called the __________________________________________ zone.

a)

habitable

b)

frozen

c)

volcanic

d)

asteroid

3.

Planets that are mostly made of gas are called:

a)

Gas giants

b)

Terrestrial planets

c)

Dwarf planets

d)

Ice planets

4.

The Asteroid Belt contains which of the following?

a)

Asteroids

b)

Comets

c)

Planets

d)

Stars

5.

The Kuiper Belt contains which of the following?

a)

Comets and icy bodies

b)

Gas giants

c)

Rocky planets

d)

Stars

6.

Pluto was reclassified as a dwarf planet because:

a)

it did not clear its orbit of other debris.

b)

it is the smallest planet in the solar system.

c)

it is farther from the Sun than Neptune.

d)

it has no moons.

7.

The models of solar systems that you can purchase in stores are not to scale because:

a)

the actual distances and sizes are too large to represent accurately in a small model

b)

it is easier to understand the solar system if the models are not to scale

c)

the planets would not fit on a table if they were to scale

d)

the colors of the planets are hard to reproduce at scale

8.

The planets stay in their orbit around the Sun because of:

a)

the Sun's gravity

b)

the planets' own light

c)

the Sun's heat

d)

the planets' speed alone

9.

A solar system is constituted by:

a)

a star and all the objects that orbit it

b)

only planets

c)

only stars

d)

asteroids and comets only

10.

Scientists are studying Mars because:

a)

they want to learn more about its environment and possibility of life.

b)

it is the closest planet to the Sun.

c)

it has the same atmosphere as Earth.

d)

it is the largest planet in the solar system.

11.

what is the planet ?

a)

Uranus

b)

Venus

c)

Saturn

12.

What planets are these?

a)

Inner(Rocky) Planets

b)

Outer(Gas Giants) Planets

13.

What is the third planet from the sun?

4 lines
14.

How many planets are there?

a)

8

b)

6

c)

12

d)

50000000 billion.

15.

What is at the center of the Solar System?

a)

The Sun is at the center of our solar system.

b)

The Earth is at the center of our solar system.

c)

The planet Mars is at the center of the solar system.

d)

The moon is at the center of the solar system.