Earth
What is the name of the force that keeps our feet on the ground?
Gravity
Which planet is famous for having big, beautiful rings around it?
Saturn
Which planet is known as the "Red Planet"?
Mars
Is the Sun a planet or a star?
Star
Which planet is the closest to the Sun?
Mercury
Why does Earth look blue when seen from outer space?
Because about 71% of its surface is covered by water (the oceans)
Which four planets are known as the Jovian or gas giant planets?
Jupiter, Saturn, Uranus, and Neptune
Which is the largest planet in our solar system?
Jupiter
What type of star will our Sun eventually become at the very end of its life, after its red giant phase?
A white dwarf
Is Pluto considered a full planet or a "dwarf planet"?
Dwarf Planet
How long does it take for Earth to complete one full rotation on its axis?
24 hours
Which planet is tilted so far on its side that it actually rotates horizontally?
Uranus
Which planet is actually the hottest, even though it’s not the closest to the Sun?
Venus
What is the life cycle stage of a star like our Sun when it runs out of hydrogen and expands enormously?
A Red Giant
What lies between the orbits of Mars and Jupiter?
Asteroid Belt
What are the layers of the Earth, from the outside in?
Crust, mantle, outer core, inner core
Which planet has the shortest day, completing a full rotation in about 10 hours?
Jupiter
Olympus Mons is the largest volcano in the solar system. Which planet is it on?
Mars
Which two gases make up most of the Sun?
Hydrogen and Helium
How many moons does Mars have?
Two
What causes the seasons on Earth?
Earth's tilted axis — not its distance from the Sun
Which planet has the most powerful winds in the solar system, reaching over 2,000 km/h?
Neptune
What force keeps all the planets in orbit around the Sun?
Gravity
Approximately how long does it take for light from the Sun to reach Earth?
About 8 minutes and 20 seconds
Which of Jupiter's moons is thought to have a liquid water ocean beneath its icy surface?
Europa