Front

Why do planets orbit the Sun?

Back

The Sun is the most massive object in our solar system, so it exerts the greatest gravitational pull.

Front

What do astronauts need to wear when walking in space?

Back

Space suits provide oxygen, protection, and communication, but they do not provide gravity.

Front

What happens to a planet's orbit as it gets farther from the Sun?

Back

The longer it takes to orbit the Sun.

Front

How can gravity be defined?

Back

Gravity is the force of attraction between two or more masses.

Front

What is a unique feature of the space shuttle compared to previous space vehicles?

Back

The space shuttle was reusable.

Front

What is the main source of gravity in our solar system?

Back

The Sun, due to its massive size.

Front

What do space suits protect astronauts from?

Back

Space suits protect astronauts from extreme temperatures, radiation, and micrometeoroids.

Front

What is the relationship between a planet's distance from the Sun and its surface temperature?

Back

Generally, the farther a planet is from the Sun, the lower its surface temperature.

Front

What is the primary function of gravity in the solar system?

Back

Gravity keeps planets in orbit around the Sun.

Front

What is the difference between terrestrial and gas giant planets?

Back

Terrestrial planets are rocky, while gas giants are composed mostly of gases.