Exploring the Solar System: Key Concepts and Facts

What did ancient astronomers call the moving objects they observed in the sky?

• Planets

• Asteroids

• Stars

• Comets

What does the term 'planet' originally mean?

• Orbiter

• Light

• Wanderer

• Star

What is the primary composition of stars?

• Liquid water

• Ice

• Solid rock

• Gases

Which force balances the gravitational pull to keep planets in orbit?

• Nuclear force

• Electrostatic force

• Centrifugal force

• Magnetic force

What are the inner planets of our solar system primarily composed of?

• Gas

• Ice

• Rock and metal

• Liquid

Which planet is known as the 'Red Planet'?

• Jupiter

• Mars

• Venus

• Saturn

What phenomenon causes a comet's tail to always point away from the sun?

• Solar winds

• Gravitational pull

• Centrifugal force

• Magnetic fields

What is the sun primarily made of?

• Oxygen and carbon

• Hydrogen and helium

• Carbon dioxide

• Nitrogen and sulfur

Which planet has the longest day in terms of Earth days?

• Jupiter

• Venus

• Mars

• Earth

What causes the tides on Earth?

• Solar flares

• The moon's gravity

• The sun's heat

• Earth's rotation