Terms
Earth, Sun, and Moon
Planets
Stars & Galaxies
100

the distance light can travel in one year

Light Year

100

How often does the tide rise?

Every 12 hours; twice a day

100

Name the first planet from the sun

Mercury

100

What color of star is the hottest?

Blue

200

The repeating circular path an object takes around a gravity source

Orbit

200

When the sun's light is fully reflected from the moon to the earth

Full moon

200

What type of planet is the earth?

Terrestrial

200

What color of star is the coolest?

Red

300
A rock that orbits the Sun but is too small to be a planet

Asteroid

300

When none of the sun's light is reflected from the moon to the earth

No moon; new moon

300

Name the 5th planet from the sun.

Jupiter

300

Surface of the sun

Photosphere

400

Reactions combining light elements into heavier elements, releasing energy

Nuclear Fusion

400

When some of the sun's light is reflected from the moon to the earth

Partial moon

400

Name a gas giant.

Jupiter, Saturn, Uranus, or Neptune

400

Middle layer of the sun

Chromosphere

500

A mathematical rule that tells us how the strength of the force of gravity depends on mass and distance

Newton's Law of Universal Gravitation

500

How long is one earth year?

365.25 days

500

What is the 7th planet from the sun?

Uranus

500
A small but VERY dense star

Neutron Star