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100
What can you infer about these two planets?
One lies on its side, the other does not
100
What type of galaxy is our Solar System?
Barred Spiral
100
List the planets that are larger than Earth.
Jupiter, Saturn, Uranus, Neptune
100
Scientists hypothesize that stars begin their lives as ________.
Huge clouds of gas and dust
100
Which are known as the outer planets?
Jupiter, Saturn, Uranus, Neptune, Pluto
200
What does the word 'ecliptic' mean?
Circular
200
What types of galaxies do these pictures represent?
Spiral, Elliptical, Irregular
200
Saturn is the _______ planet from the Sun.
Sixth
200
Pieces of rock made of minerals similar to those that formed rocky planets and moons are known as ______.
Asteroids
200
Earth's tilt and its revolution around the Sun causes ________.
Seasons
300
How many AU's away from the Sun is Mars?
1.52
300
Which planet spins backwards?
Venus
300
Uranus rotates in which direction?
East to West
300
As the Earth is spinning around the Sun, it is also spinning on its axis. This is also called the _____ of the Earth.
Rotation
300
Which are known as the inner planets?
Mercury, Earth, Mars, and Venus
400
Asteroids orbit the Sun between ______ and ______
Mars, Jupiter
400
If it takes the inner planets _____ time to revolve around the Sun; it can be inferred that planets that are farther away from the Sun take ______ to revolve around it.
Less, Longer
400
The outer planets are classified as _______ planets.
Gas Giant
400
What is true about Venus?
Its surface is surrounded by thick clouds
400
Mars is often called the Red Planet. What causes its surface to appear red?
Iron oxide, known as rust, is found in the rocks
500
Why can't a person see the entire Milky Way from Earth?
Earth is inside this galaxy
500
It takes Venus approximately ______ Earth ______ to orbit the Sun.
225, Days
500
What is not a description of a comet?
Began as huge clouds of gas and dust
500
True or False? More than 100 spacecrafts have been launched to explore the Moon.
True
500
The distance between the Earth and the Sun is measured in a(n)
Astronomical Unit
600
A group of stars that form a pattern in the sky are known as a
Constellation
600
Jupiter has the ______ day.
Shortest
600
True or False? There is more than one planet in our Solar System that has rings.
True
600
What is a characteristic the inner planets have in common?
They are all terrestrial
600
What is not true about Mercury?
It is Earth's closest neighbor