Front

What is the habitable zone?

Back

A zone with the correct distance away from a star where conditions may be right for life.

Front

What two things keep the planets in orbit around the sun?

Back

Gravity and inertia.

Front

Which planet has the shortest orbital period?

Back

Mercury.

Front

What would happen to Earth if there were no inertia?

Back

Earth would crash into the sun.

Front

What is the doughnut-shaped region just past Neptune called?

Back

The Kuiper Belt.

Front

Define gravity.

Back

A force that attracts two bodies towards each other, keeping planets in orbit around stars.

Front

What is inertia?

Back

The tendency of an object to resist changes in its state of motion.

Front

What is an orbital period?

Back

The time it takes for a planet to complete one full orbit around the sun.

Front

Name the four terrestrial planets in our solar system.

Back

Mercury, Venus, Earth, Mars.

Front

What is the main component of the Kuiper Belt?

Back

Icy objects and dwarf planets.