The Moon
Because of the Tilt
More About the Tilt
The Earth in Space
Beyond Earth
100

Any of the different appearances of the moon as different amounts of it are seen from Earth.

phases

100

Specific climate conditions based on where you are on Earth, and Earth's location in its orbit around the sun.

season

100

The time between the summer solstice and the winter equinox. The hottest time of the year.

summer

100

To circle around something or move in an orbit.

revolve

100

We orbit the sun, are made of rock and have solid surfaces. Though smaller than the others, we have enough gravity to be spheres.

terrestrial planets

200

Any phase of the moon between the new moon and the full moon, when the moon crescent is growing.

waxing

200

The point where the Sun appears to reach either its highest (summer) or lowest (winter) point in the sky for the year.

solstice

200

The time between the summer equinox and the summer solstice. The time when winter warms into summer.

spring

200

The path a satellite takes around a planet or star.

orbit

200

This type of planet has more moons than the other type of planet.

Gas Giants

300

A phase of the moon when it's between a half moon and full moon.

gibbous

300

The portion of light that is blocked by an object.

shadow

300

The time between the winter equinox and the winter solstice. The time when summer cools into winter.

fall

300

The force by which a planet or other body draws objects toward its center.

gravity

300

Name the Gas Giants

Jupiter, Saturn, Uranus, Neptune

400

Any phase of the moon between the new moon and the full moon, when the moon crescent is getting smaller.

waning

400

The points where the Sun shines directly at the equator and the only times when both hemispheres experience roughly equal amounts of daytime and nighttime.

equinox

400

The time between the winter solstice and the summer equinox. The coldest time of the year.

winter

400

A moon, planet or machine that orbits a planet or star.

satellite

400

Name the terrestrial planets.

Mercury, Venus, the Earth, and Mars

500

A phase of the moon when it’s between a half moon and a new moon.

crescent

500

An invisible line around which an object rotates, or spins.

axis

500

An object's spinning motion about its own axis.

rotate

500

An exploding ball of burning gas held together by gravity.

star

500

Consists of a star, like our Sun, and everything bound to it by gravity.

solar system