Terrestrial Planets
Gaseous Planet
Dwarf Planets
Inner vs. Outer Planets
Solar System Definitions
100

The only terrestrial planet known to support life.
What is Earth?

What is Earth?

100

The largest planet in the solar system, known for its Great Red Spot.

What is Jupiter?

100

This famous dwarf planet was once classified as the ninth planet in the solar system.

What is Pluto?

100

These four planets are closest to the sun and are rocky in composition.

What are the inner planets?

100

These celestial bodies orbit a star, are nearly round in shape, and have cleared their orbital paths.

What are planets?

200

This is the smallest terrestrial planet in the solar system

What is Mercury?

200

This gas giant has a beautiful system of rings made mostly of ice and rock.

What is Saturn?

200

The largest dwarf planet, located in the asteroid belt.

What is Ceres?

200

The boundary between the inner and outer planets is marked by this asteroid belt.

What is the asteroid belt?

200

These smaller celestial bodies are similar to planets but have not cleared their orbital paths of debris.

What are dwarf planets?

300

Known as the "Red Planet," its surface is covered in iron oxide.

What is Mars?

300

The planet with the fastest winds in the solar system, reaching speeds of over 1,200 mph.

What is Neptune?

300

This dwarf planet is named after a Polynesian goddess of creation.

What is Haumea?

300

These planets are composed mostly of gases like hydrogen and helium and are found farther from the sun.

What are the outer planets?

300

The layer of gas surrounding a planet or moon.

What is an atmosphere?

400

This terrestrial planet has the densest atmosphere, mostly composed of carbon dioxide.

What is Venus

400

This gas giant rotates on its side with an axial tilt of 98 degrees.

What is Uranus?

400

Located in the Kuiper Belt, this dwarf planet is named after the god of the dead in mythology.

What is Pluto?

400

The inner planets are also called this, a term that refers to their Earth-like nature.

What are terrestrial planets?

400

The term for the four planets closest to the Sun, characterized by their rocky surfaces.

What are terrestrial planets?

500

This planet's surface is heavily cratered and similar to Earth’s moon.

What is Mercury?

500

Both of these gas giants are classified as “ice giants” due to their icy cores.

What are Uranus and Neptune?

500

This dwarf planet, discovered in 2005, is sometimes referred to as the "tenth planet."

What is Eris?

500

Jupiter, Saturn, Uranus, and Neptune make up this group of planets.

What are the outer planets?

500

The boundary in our solar system that separates the rocky inner planets from the gaseous outer planets.

What is the asteroid belt?