Earth, Moon, & Sun
Solar System
"Space Junk"
Stars
Galaxies
100
What is the acceleration of gravity on Earth?
9.8 m/s/s
100
How many planets are in our solar system?
8
100
Where is the Asteroid Belt located?
Between Mars and Jupiter
100
What keeps a star burning?
nuclear reactions
100
How many different types of galaxies are there? Name them!
3: - Spiral - Elliptical - Irregular
200
What is the Earth's core made of?
Molten Iron
200
Name the terrestrial planets IN ORDER FROM THE SUN
Mercury, Venus, Earth, Mars
200
What are the differences between meteors, meteoroids, and meteorites, and asteroids?
Asteroids: Space rocks Meteoroids: Smaller asteroids that are moving towards Earth Meteors: Meteoroids that reach our atmosphere "shooting stars" Meteorites: Meteors that reach the Earth's surface
200
What is formed when a supernova explodes?
A Black Hole
200
How many galaxies are there in the universe?
approximately 100 billion
300
What causes the Earth's seasons?
Earth's 23 degree tilt
300
Name the Gas Planets IN ORDER FROM THE SUN
Jupiter, Saturn, Uranus, Neptune
300
What are comets made of?
Ice and dust "Dirty snowball"
300
What is the exact speed of light (in miles or kilometers)?
300,000 km/sec or 186,000 miles/sec
300
How large is the Milky Way galaxy?
100,000 light years in diameter
400
How long does it take the moon to rotate the Earth? How long to revolve around the Earth?
27.3 days
400
Name the steps that occurred to form our solar system
1: Solar Nebula 2: Disk 3: Solar System
400
What part of a comet always points AWAY from the sun?
The tail
400
How does our star (the sun) generate energy?
Nuclear fusions between Hydrogen atoms into Helium
400
Describe an elliptical galaxy
shaped like spheres or eggs; have almost no dust or gas between stars; contain old stars
500
What type of eclipse is formed when the Sun, Earth, and moon are aligned (in that order?)
Lunar eclipse
500
Why is Pluto not a planet?
- Smaller than it's own moon - It's orbit intersects with Neptune's orbit - Weak gravitational pull
500
What do we refer to as "shooting stars"?
Meteors while they are burning in our atmosphere
500
True or False: Our constellations today are the same as 100,000 years ago
FALSE! Our constellations are dynamic
500
How long ago did the Big Bang occur?
13.7 billion years ago
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