The Solar System

The solar system is a collection of celestial bodies that orbit around which central star?

• Alpha Centauri

• Proxima Centauri

• The Sun

• Betelgeuse

Define 'solar system'.

Define 'orbit'.

What is the smallest of the terrestrial planets?

How far is Mercury from the sun?

• 57.91 million kilometers

• 108.2 million kilometers

• 149.6 million kilometers

• 227.9 million kilometers

Venus is the hottest planet even though it is not the closest to the sun because:

• It has a thick atmosphere rich in carbon dioxide, creating a strong greenhouse effect.

• It is closer to the sun than any other planet.

• It has active volcanoes that constantly heat the surface.

• It has a faster rotation speed, generating more heat.

Which of the following features of Venus are similar to Earth?

• Presence of a thick atmosphere

• Similar surface temperature

• Similar size and mass

• Presence of liquid water

Which planet may have had a shallow ocean at one time?

What features of Earth do you notice when you look at this image taken from space?

• Oceans and continents

• Mountains and rivers

• Deserts and forests

• Cities and roads

What other features of Mars are mentioned in the text?

• Olympus Mons and Valles Marineris

• The Great Red Spot and Io

• The Kuiper Belt and Oort Cloud

• Europa and Ganymede