Planet Profiles
Moon Phases & Eclipses
Celestial Bodies
Space Science Terms
Mystery of the Universe
100

Which planet is the smallest in our solar system?

What is Mercury?

100

What moon phase comes right after a full moon?

What is a waning gibbous?

100

What celestial body is at the center of our solar system?

What is the Sun?

100

What is the name of the collection of planets, moons, asteroids, and the Sun that we live in?

What is the solar system?

100

What is the theory of how the universe formed?

What is the Big Bang Theory?

200

These two planets are about the same size, often called “sister planets.”

What are Earth and Venus?

200

During which moon phase can a solar eclipse occur?

What is a new moon?

200

Which celestial bodies form a “belt” between Mars and Jupiter?

What are asteroids?

200

What is the term for the curved path that planets follow around the Sun?

What is an orbit?

200

What theory stated that the Earth was the center of the solar system?

What is the geocentric theory?

300

Name the four terrestrial (rocky) planets.

What are Mercury, Venus, Earth, and Mars?

300

During which moon phase can a lunar eclipse occur?

What is a full moon?

300

When a space rock hits Earth’s surface, what is it called?

What is a meteorite?

300

What force pulls objects toward each other, including keeping the planets in orbit around the Sun?

What is gravity?

300

What is the name of the galaxy we live in?

What is the Milky Way galaxy?

400

Name the four Jovian (gas giant) planets.

What are Jupiter, Saturn, Uranus, and Neptune?

400

What does “waning” mean when describing the moon?

It means the lit portion of the moon is getting smaller.

400

What celestial body often has a glowing tail when it approaches the Sun?

What is a comet?

400

What is the name of the model of the solar system where the Sun is at the center, and the planets orbit around it?

What is the heliocentric model?

400

What planet is the only one we have successfully sent rovers to?

What is Mars?

500

Even though it’s not the closest to the Sun, this is the hottest planet in the solar system.

What is Venus?

500

List all of the lunar phases in order, starting with the full moon.

Full Moon, Waning Gibbous, Last Quarter, Waning Crescent, New Moon, Waxing Crescent, First Quarter, Waxing Gibbous.

500

What is the largest type of space rock?

What is an asteroid?

500

This property of matter explains why objects in motion stay in motion unless acted upon by an outside force.

What is inertia?

500

What is the name of the telescope that has helped with the most space discoveries?

What is the Hubble Space Telescope?

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