Chapter 16

Question 1

Planet

Answer 1

a large, ball-shaped body of matter that revolves or travels around any star.

Question 2

Solar System

Answer 2

the sun, eight planets and their moons, dwarf planets and other objects that revolve around the sun.

Question 3

Orbit

Answer 3

the path of any object in space that revolves around another object in space

Question 4

Asteroid

Answer 4

a small chunk of rock that orbits around the Sun

Question 5

What are meteoroids?

Answer 5

Meteoroids are bits of rock and metal passing through our solar system

Question 6

What are comets?

Answer 6

Chunks of ROCK, DUST and ICE

Question 7

What is the streak of light called that meteoroids make in the sky?

Answer 7

a METEOR

Question 8

What are the names of the eight planets?

Answer 8

Saturn
Uranus
Neptune
Jupiter
Earth
Mars
Mercury
Venus

Question 9

What keeps the solar system stay together?

Answer 9

The Suns’ GRAVITY keeps the solar system together

Question 10

Name 2 objects int he solar system

Answer 10

Comets and Meteoroids

Question 11

Why is Mercury so hot and Neptune is almost frozen?

Answer 11

Mercury is so hot because it is so close to the sun.

Neptune is cold because it is so far away from the sun.

Question 12

What planet is the smallest planet?

Answer 12

Mercury

Question 13

How many Earth days Does it take for Mercury to orbit the sun?

Answer 13

88 Earth days

Question 14

What is Venus covered with ?

Answer 14

Venues is covered with huge volcanos that spew poisonous gases

Question 15

Why can people and animals survive on Earth?

Answer 15

Because Earth is not too hot or too cold, has a lot of liquid water and has atmosphere (oxygen and carbon dioxide) that living things need.

Question 16

How do scientists think Earth’s moon may have been created?

Answer 16

It was created by chunks of rocks broken off and pulled together to form the moon.

Question 17

What are 3 things scientists thought the surface of Mars had on it at one time?

Answer 17

Rivers
Lakes
Oceans

Question 18

What does the surface of Mars look like now?

Answer 18

a dry desert

Question 19

What are the names of the 4 outer planets?

Answer 19

Jupiter
Uranus
Neptune
Saturn

Question 20

What is the Great Red Spot in Jupiter?

Answer 20

a large storm

Question 21

Uranus doesn’t rotate like other planets, what does it do?

Answer 21

it spins on its side.

Question 22

What new category was Pluto put in?

PLUTO

Answer 22

Dwarf planet category.
Pluto is a small, ball-shaped object that orbits the Sun.
Pluto is the only outer planet that is not made of gas.

Question 23

What 2 things have helped us explore the Solar System?

Answer 23

Telescopes and Spacecrafts

Question 24

What do telescopes have and what do they do?

Answer 24

they have glass lenses and mirrors

Question 25

What planet is the only planet that has animals on it?

Answer 25

EARTH

Question 26

What are robots doing on Mars?

Answer 26

They are testing soil to look for evidence of past life.

Question 27

Why is the sun so bright and hot?

Answer 27

The sun is made of hot burning gases. Energy is released from the Sun by gas particles that have positive charge collide and join. This energy moves in all directions and hits Earth as SUNLIGHT

Question 28

What are the 4 inner planets?

Answer 28

Mercury Venus Earth Mars

Question 29

In what ways are Jupiter and Saturn alike?

Answer 29

``` They are both outer planets. Made of mostly gas. GAS GIANTS They have RINGS Surfaces are not solid. They have deep atmospheres with think layers of clouds and strong winds. ```

Question 30

Why is Mars called the "red planet"?

Answer 30

It has a reddish-orange surface.