Which of the following is true? Read carefully!

Comets revolve around the sun in large orbits.

You see a streak of light flash across the night sky. Which of these might explain the streak?

A meteor burning up in the Earth's atmosphere

Choose the correct statement.

The moon orbits Earth & the Earth orbits the Sun.

Our solar system is made up of:

The sun, planets, and smaller bodies

The "star" in the picture is actually the planet, Venus. Why do we see it shining like a star?

It is the closest planet to Earth, and it reflects sunlight.

Inner planets are called _____________ and outer planets are called _______________.

terrestrial planets & gas giants

Why does a comet's tail point away from the sun?

Solar winds blow the tail away from the sun.

An Astronomical Unit describes what?

the average distance between Earth and the Sun

Which of these planets are found in the outer solar system?

Jupiter, Saturn, Uranus, Neptune

Mostly metallic space rocks that have landed on Earth.

A period of revolution is:

the time it takes an object to revolve around the sun, the time it takes to make a complete orbit around the sun

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Our Solar System

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This is a summary of Unit 9.

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Questions 25

Answers

1
The unit that measures the average distance between Earth and the sun is:
Anatomical Unit (AU)
Amazing Unit (AU)
Astronomical Unit (AU)
Awesome Unit (AU)
2
1 AU is equal to how many light-minutes?
1 light-minute
23.5 light-minutes
8.3 light-minutes
3.8 light-minutes
3
What is the name of the region beyond Neptune's orbit where comets have been found?
Kuiper belt
Asteroid belt
Comet cloud
Oort cloud
4
Which four planets are found in the inner solar system?
Jupiter, Saturn, Uranus, Neptune
Mars, Venus, Earth, Mercury
Jupiter, Venus, Mercury, Saturn
Earth, Saturn, Mercury, Venus
5
Which of the following is true? Read carefully!
Comets revolve around the Milky Way in large orbits.
We see comets because they each rotate on their axis.
Comets revolve around the sun in large orbits.
Comets revolve around the earth in large orbits.
6
Planets that are farther away from the sun tend to have ________ orbital speeds.
The same
Random
Slower
Faster
7
Scientists found many of these in the space between Mars and Jupiter.
Meteorites
Comets
Meteors
Asteroids
8
You see a streak of light flash across the night sky. Which of these might explain the streak?
A comet's tail burning off
A supernova from 1500 light-years away
Spontaneous combustion of an asteroid
A meteor burning up in the Earth's atmosphere
9
Choose the correct statement.
The moon orbits Earth & the Earth orbits the Sun.
The Earth orbits the moon & the Sun orbits the Earth.
The Sun orbits the Earth & the moon orbits the Sun.
The moon orbits Earth & the Sun orbits Earth.
10
Our solar system is made up of:
Gas, dust, and planets
Neutron stars and planets
The sun, planets, and smaller bodies
Asteroids, comets, and planets
11
There are ______ planets in the inner solar system.
9
6
8
4
12
When might you find a meteorite if you are very lucky?
After a comet passes through our solar system.
After a meteor shower.
After an earthquake.
After a hurricane.
13
Which value is the best fit for the question mark in the table?
3.2 AU
9.6 AU
2.0 AU
.5 AU
14
The "star" in the picture is actually the planet, Venus. Why do we see it shining like a star?
Of all the planets, it makes the most light.
The greenhouse effect on Venus causes it to glow.
It is the closest planet to Earth, and it reflects sunlight.
It is burning up in Earth's atmosphere.
15
Inner planets are called _____________ and outer planets are called _______________.
gas planets & terrestrial giants
terrestrial planets & gas giants
terrains & vaporeons
extra terrestrials & green giants
16
Why does a comet's tail point away from the sun?
Solar winds blow the tail away from the sun.
The tail is being pulled away from the sun by gravity.
The comet is rotating Northward.
The tail is scared of the sun & is trying to run away.
17
What are comets made of?
the wishes and hopes of small children
frozen gases and metals
Ice, rock, and cosmic dust
Iron, nickel, and rock
18
When a planet rotates once on its axis, we say that the time that has passed is _________.
the planet's day
the planet's week
the planet's month
the planet's year
19
An Astronomical Unit describes what?
the average distance between Earth and the Sun
the distance between Earth and the edge of our solar system
the distance that light travels in a year
the distance between the Earth and the nearest planet
20
Which of these planets are found in the outer solar system?
Jupiter, Saturn, Uranus, Neptune
Uranus, Neptune, Mars, Earth
Mercury, Venus, Earth, Mars
Jupiter, Neptune, Mars, Uranus
21
When energy is emitted from the Sun, about how long will it take to reach Earth?
~8 seconds
~8 minutes
~8 days
~8 hours
22
What is the object in the picture?
Nyan-cat!! =^-^=
Comet
Meteor
Asteroid
23
How many planets are there in the outer solar system?
8
4
6
9
24
What are meteorites?
Chunks of ice and dust hurtling through space.
Never meteor-wrongs!
Mostly metallic space rocks burning in Earth's atmosphere.
Mostly metallic space rocks that have landed on Earth.
25
A period of revolution is:
the time it took to fight the Revolutionary War
the time it takes an object to revolve around the sun
the time it takes to make a complete orbit around the sun
the time it takes an object to rotate once on its axis

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