The sun
This star is at the center of our solar system
what is sun?
Earth’s only natural satellite.
What is the Moon?
Earth is the ___ planet from the Sun.
What is the third?
Earth moves around the Sun in this path
What is an orbit?
The Sun is mostly made of these two gases.
What are hydrogen and helium?
The Moon does not make its own light; it does this instead.
What is reflecting sunlight?
Most of Earth’s surface is covered by this.
What is water?
One trip around the Sun equals one of these.
What is a year?
The Sun’s energy reaches Earth in about this many minutes.
What is about 8 minutes?
The same side of the Moon always faces Earth because of this.
What is tidal locking?
Earth takes this long to rotate once on its axis.
What is 24 hours?
Day and night are caused by this Earth movement.
What is rotation?
This process powers the Sun by turning hydrogen into helium.
What is nuclear fusion?
These dark, flat areas on the Moon are called this.
What are maria?
This layer of Earth contains weather and air we breathe.
What is the atmosphere?
The Moon keeps the same face toward Earth because of this.
What is synchronous rotation?
The Sun is about this many times wider than Earth.
What is about 100 times?
Humans first landed on the Moon in this year.
What is 1969?
Earth’s tilted axis causes this yearly change.
What are seasons
This force keeps planets in orbit.
what is gravity?