Star Characteristics
Star Groups
Lifespan of a Star
Earth
Moon
100
What color of star is the coolest?
red
100
What is a huge system of stars, dust, and gas held together by gravity?
Galaxy
100
What is a cloud of gas and dust where stars are formed?
Nebula
100
How long does it take for the Earth to make one complete revolution?
24 hours
100
Why is the Moon illuminated?
It reflects the light from the Sun.
200
What size of star is our Sun?
Medium
200
What type of galaxy is the Milky Way?
Spiral Galaxy
200
What is a gigantic explosion that hurls matter and energy far out into space?
Supernova
200
In a 365 day period, the Earth completes one ______.
revolution
200
The moon completes on complete orbit around the Earth in about _____.
27 days
300
What color of star is the hottest?
Blue
300
What shape is an elliptical galaxy?
Football
300
What is a bottomless pit from which nothing escapes?
Black hole
300
What causes the Earth to have seasons?
The tilt of Earth's axis
300
Why do craters last for millions of years on the surface of the Moon?
The Moon has no water or wind to erode the craters.
400
What are the biggest stars in the universe?
Supergiant
400
What type of galaxy is shaped like a pinwheel?
Spiral galaxy
400
What type does a star become right before exploding into a supernova?
supergiant
400
Why does the Earth have such a comfortable temperature?
The Earth rotates quickly on its axis causing day and night to quickly follow each other in a short period of time.
400
During which phase of the Moon is the Moon passing between Earth and the Sun?
New Moon
500
How far away is the Sun from Earth?
1 AU (93 million miles)
500
What is a group of stars forming a recognizable pattern?
constellation
500
What happens to star after it explodes?
Becomes a neutron star or a black hole
500
What is the shape of Earth's orbit?
Elliptical
500
The Moon completes on complete rotation in about _____.
27 days
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