rotation/revolution
The amount of time it takes for the earth to make a complete rotation.
24 hours/ 1 day
This object is a rocky surface, much like the Earth.
The Moon.
The name of the different amounts of light that is reflected off of the moon.
Phases
The sun produces _________ and _________ to provide our planet with energy.
heat and light
The name of the space program that sent astronauts into space to land on and study the moon.
Apollo Missions
The amount of time it takes the earth to make a complete revolution around the sun.
365 1/4 days or 1 year
The amount of Earths that can fit across the diameter of the sun.
110
This is the reason the moon can be seen at night.
Sunlight reflects off of its surface.
The approximate amount of time the sun has been shining for.
5 billion years (4.6 billion)
The name of the solar system model that we use today.
Sun-centered
This object takes about a month to revolve around the earth.
Moon
These factors are the cause for seasons.
The tilt of Earth's axis as it revolves around the sun.
The moon is Earth's natural _____________.
satellite
Our sun is 400x larger than this object.
Moon
These two astronomers believed in an earth-centered universe.
Aristotle and Ptolemy.
This is the reason we can see the sun during the daytime, but we cannot see it at nighttime.
Earth' rotation
The earth is the _____ planet from the sun.
Third
This phase would occur after a first quarter.
Waxing gibbous.
This is what the sun is made of.
Hydrogen and Helium
These two astronomers believed in a sun-centered universe.
Copernicus and Galileo.
This object completes a rotation and a revolution in the same amount of time.
The moon.
The approximate age of the Earth.
About 4.5 billion years old.
This phase would occur after waning gibbous.
last/third quarter
93 million miles/150 million kilometers.
The phrase Neil Armstrong stated when he first stepped on the moon.
"That's one small step for man, one giant leap for mankind."