Front

What holds the planets in their orbits around the sun?

Back

Gravity is the force that keeps the planets in their orbits around the sun.

Front

Earth and the other planets closest to the Sun are made mostly of _______

Back

Rock. The inner planets, including Earth, are primarily composed of rock.

Front

Which object has the most gravity?

Back

The Sun has the most gravity in our solar system.

Front

Which is the largest object in our solar system?

Back

The Sun is the largest object in our solar system.

Front

Which planet is closest to the sun?

Back

Mercury is the closest planet to the Sun.

Front

What is the center of our solar system?

Back

The Sun is the center of our solar system.

Front

What are the four inner planets?

Back

The four inner planets are Mercury, Venus, Earth, and Mars.

Front

What are the four outer planets?

Back

The four outer planets are Jupiter, Saturn, Uranus, and Neptune.

Front

What is a planet?

Back

A planet is a large celestial body that orbits a star.

Front

What is the difference between a planet and a star?

Back

A planet orbits a star, while a star generates its own light and heat.