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100
When the moon appears to be a bright circle, it is in this phase
What is a full moon?
100

True or False

Most "gas giants" are closer to the sun.

False

100

True or False

The moon has less gravity (less gravitational pull) than the Earth because it has less mass than the Earth. 

True

100

When the moon is not visible to us on Earth in its lunar cycle, it is called a __________?

New moon

100
The force that keeps the planets in their orbit
What is gravity?
200

What happens when Earth rotates on its axis once.

What is one day (24 hours)?

200

Day and night are caused by this movement of the Earth

What is rotation on its axis?

200
The Earth takes one year to make one of these around the sun
What is a revolution?
200

A __________ occurs when the moon comes between the sun and the earth and the Moon's shadow falls on Earth, blocking the Sun from Earth.

A solar eclipse

200

Which season has the least amount of daylight in the Northern Hemisphere?

winter

300

The changes in how the moon looks to people on Earth

What are moon (lunar) phases?

300

The first day of summer in the Southern Hemisphere is in what month?

What is December? 

300

The first day of summer in the Northern Hemisphere

What is June 21?

300
These changes are caused by Earth’s tilt on its axis and its revolution around the sun
What are seasons of the year?
300
Earth’s path around the sun
What is an orbit?
400
An object that produces its own heat and light
What is a star?
400
When one object in space casts a shadow on another object in space
What is an eclipse?
400
The sun, eight planets, and their moons, comets and asteroids
What is the solar system?
400
The star at the center of the solar system
What is the sun?
400

When the moon passes directly behind the Earth and into its shadow

lunar eclipse

500
An instrument that magnifies, or makes larger, distant objects
What is a telescope?
500
The moon is between Earth and sun
What is a new moon?
500

When the north pole is tilted directly toward the sun, the season it's experiencing is _____.

summer

500

What season is it in the southern hemisphere when the north pole is tilted away from the sun?

summer

500

The time of year when there is equal day and night

What is equinox