Earth
Sun
Moon
This and That
Vocabulary
100
This causes the Earth's seasons.
What is the axial tilt of the Earth?
100
This is what causes objects to orbit the Sun.
What is the sun's gravity?
100
It takes this long for the moon to revolve completely around the Earth.
What is about a month?
100
This is the name of the first artificial satellite that the Soviet Union launched.
What is Sputnik 1?
100
This word describes the Earth spinning continuously.
What is "rotating"?
200
These are the scientists that believed Earth was the center of the universe.
What are Aristotle and Ptolemy?
200
The sun is an average star made of this.
What is a hydrogen?
200
The moon revolves around this:
What is the Earth?
200
It takes this long for the Earth to complete on full rotation.
What is 24 hours?
200
This imaginary line goes from the North Pole to the South Pole of the Earth.
What is the "axis"?
300
The Earth takes this long to revolve around the sun.
What is 365 1/4 days or one year?
300
The sun rises in this direction.
What is the "east"?
300
During this phase of the moon, we can see no light from the moon.
What is a "new moon"?
300
This is the person who first used a telescope to study the planets.
Who is Galileo?
300
This term is used to describe the phase of the moon when we see all of the lit side.
What is "full moon"?
400
This is why Earth can support life.
What are 1) large amounts of water, 2) an atmosphere that protects the surface from the Sun's UV rays, 3) oxygen in the atmosphere?
400
These are the two scientists that believed the Sun was in the center of the solar system.
Who are Copernicus and Galileo?
400
This is the name of the space program that sent astronauts into space to study the moon.
What is a Apollo Missions?
400
The moon appears bright at night because of this.
What is the reflection of the Sun's light?
400
As we see less and less of the lit part of the moon, we say that it is doing this.
What is "waning"?
500
This is what Earth has that the moon does not have.
What is life, air, water, gas, and soil?
500
This is how the sun's rays strike the Earth in the summer.
What is "directly"?
500
The surface of the moon is made up of these landforms.
What is the craters, highlands and flat areas?
500
This is the phase of the moon that is more than a half moon, but less than a full moon.
What is a gibbous moon?
500
This is a small, rocky satellite with harsh temperatures and no life.
What is the moon?
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