One astronomical unit (AU) is roughly equal to what?

The distance between the earth and the sun.

What does it mean for a planet to have an elliptical orbit?

The planet’s path around the sun is shaped like an oval.

What makes day and night?

The earth's rotation on its axis.

Which list shows the planets from smallest to largest?

Mercury, Mars, Venus, Earth, Neptune, Uranus, Saturn, Jupiter

Why does a comet have a bright tail?

The sun's heat vaporizes gasses, ice, and dust, leaving behind a tail.

What is a terrestrial planet?

A planet composed of rocks, minerals, and metals.

Why does the sun appear to be much bigger than the other stars in the Solar System?

The sun is the closest star to the earth

When the earth completes one revolution around the sun.

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Solar System Unit Review

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Fifth Grade Science Solar System Unit Review

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Questions 16

Answers

1
A meteor that makes it to the surface of Earth without completely burning up is called a
dwarf planet
meteorite
asteriod
comet
2
One astronomical unit (AU) is roughly equal to what?
the diameter of the sun.
The distance between the earth and the sun.
The width of the earth.
The distance between the sun and Pluto.
3
What does it mean for a planet to have an elliptical orbit?
The planet’s path around the sun is shaped like a perfect circle.
The planet’s axis is tilted.
The planet’s axis is not tilted and is oriented vertically.
The planet’s path around the sun is shaped like an oval.
4
What makes day and night?
The earth's rotation on its axis.
The earth's orbit around the moon.
The moon's orbit around the earth.
How the sun rotates around the earth.
5
Which two planets are classified as gas giants?
Jupiter and Saturn
Earth and Mars
Neptune and Uranus
Jupiter and Earth
6
Which list shows the planets from smallest to largest?
Mars, Mercury, Earth, Venus, Neptune, Saturn, Uranus, Jupiter
Venus, Mercury, Earth, Mars, Neptune, Uranus, Saturn, Jupiter
Mercury, Mars, Venus, Earth, Neptune, Uranus, Saturn, Jupiter
Mercury, Mars, Venus, Earth, Uranus, Neptune, Saturn, Jupiter
7
Why does a comet have a bright tail?
A comet is made of burning rock that lights up as it moves.
An optical illusion happens when the comet travels through the atmosphere.
The mineral composition of the comet gives off light.
The sun's heat vaporizes gasses, ice, and dust, leaving behind a tail.
8
Uranus is a unique planet because it rotates sideways due to the extreme tilt of its axis.
True
False
9
What is a terrestrial planet?
A planet that is composed mostly of gases.
A planet that revolves around another planet.
A planet composed of rocks, minerals, and metals.
A planet that orbits a star other than the sun.
10
The farther away an object is from the sun, the greater its orbital period.
False
True
11
Why does the sun appear to be much bigger than the other stars in the Solar System?
The sun is hotter than the other stars.
The sun is yellow and is much brighter than the other stars
The sun is the closest star to the earth
The sun is a circle and it it easy to see.
12
Adding the diameters of every planet in our solar system would create a sum greater or smaller than the sun's diameter?
Smaller
Greater
13
What are comets made of?
metal and ice
ice and gas
ice and rock
rock and gas
14
What makes a year?
When the earth completes one complete rotation.
When the moon completes one revolution around the earth.
How long it takes for the earth to tilt on its axis.
When the earth completes one revolution around the sun.
15
What are asteroids made of?
rock and metals
metals and gas
ice and rock
ice and gas
16
Which planet is the earth from our sun?
third
fourth
first
second

Solar System Unit Review Flashcards | StudBud