Planets

Front

What is a planet?

Back

A planet is a celestial body that orbits a star, is spherical in shape, and has cleared its orbit of other debris.

Front

What is a dwarf planet?

Back

A dwarf planet is a celestial body that orbits the sun, is spherical in shape, but has not cleared its orbit of other debris.

Front

Which planet was reclassified from a planet to a dwarf planet?

Back

Pluto was reclassified from a planet to a dwarf planet in 2006.

Front

What is the only planet in the solar system with oceans of liquid water?

Back

Earth is the only planet in the solar system with oceans of liquid water.

Front

Which planet is known as Earth's twin in size and mass?

Back

Venus is known as Earth's twin in size and mass.

Front

What is the atmosphere of Mercury like?

Back

Mercury has a very thin atmosphere due to its low gravity and proximity to the sun.

Front

What is the main characteristic of Pluto's orbit?

Back

Pluto has an extremely elliptical orbit, which means it is not a perfect circle.

Front

Which planet has the thickest atmosphere?

Back

Venus has a very thick atmosphere, primarily composed of carbon dioxide.

Front

What defines a terrestrial planet?

Back

A terrestrial planet is a rocky planet, like Earth, Mars, Venus, and Mercury, characterized by a solid surface.

Front

What defines a gas giant?

Back

A gas giant is a large planet that is not primarily composed of solid matter, such as Jupiter and Saturn.