Earth
This causes the Earth's seasons.
What is the tilt of the Earth?
The layer of the sun where the power is produced.
What is the core?
It takes this long for the moon to go through all its phases.
What is 29.5 days or about a month?
This keeps the Earth and moon in their orbits.
What is "gravity"?
This word describes the Earth spinning continuously.
What is "rotating"?
The shape of the Earth's orbit.
What is elliptical?
The sun is a big fiery ball made up mainly of these two types of gases.
What are hydrogen and helium?
Solar refers to the sun. This term refers to the moon.
What is "lunar"?
The space program that lead to the first "space walk".
What is Gemini?
This imaginary line goes from the North Pole to the South Pole of the Earth through the center.
What is the "axis"?
The Earth takes this long to revolve around the sun.
What is 365 1/4 days?
This is the process that powers our sun?
What is nuclear fusion?
During this phase of the moon, we can see no light from the moon.
What is a "new moon"?
The first man to orbit the Earth.
Who was John Glenn?
Dark areas on the moon created by lava flow thought at one time to be "seas" on the moon.
What are maria?
When it is winter in North America, it is this in Australia.
What is "summer"?
This occurs when the moon moves between the sun and the Earth, blocking some the the sun's light.
What is a "solar eclipse"?
During this process, the moon receives a shadow from the Earth.
What is a "lunar eclipse"?
The sun and Earth are farthest apart during this time in the Northern Hemisphere.
What is "summer solstice"?
As we see less and less of the lit part of the moon, we say that it is doing this.
What is "waning"?
These occur twice a year, once in September and once in March.
What are the equinoxes?
What percent of the mass of our soar system comes from the the sun?
What is 99%?
The moon has no atmosphere. Name two things that we discussed that happen on the moon because of this?
What is drastic changes in temperature from day to night and constant bombardment from space debris?
Which Apollo mission landed us on the moon?
What is Apollo 11?
The "halo", outer layer of sun seen during a solar eclipse.
What is the "corona"?