Mars
Venus
Earth
Mercury
Saturn
100

Why is mars considered the red planet?

The rusty surface color, caused by iron

100

Venus is often referred to as Earth's "sister planet" because of its similar size and structure. True or False?

True

100

Earth is the only planet in the solar system known to support what essential element for life?

What is liquid water?

100

Mercury is the smallest planet in the solar system. True or False?

True

100

Saturn is known for its spectacular system of rings made primarily of what material?

What is ice particles?

200

What is the name of the tallest volcano in the solar system, located on Mars?

What is Olympus Mons?

200

What is the atmospheric pressure on Venus compared to Earth's?

What is about 92 times greater?

200

What is the name of the largest ocean on Earth?

What is the Pacific Ocean?

200

What is the name of the largest impact crater on Mercury?

What is the Caloris Basin?

200

What is the name of the largest moon of Saturn?

What is Titan?

300

The Mars rover named after the Roman god of war successfully landed on Mars in 2012. What is the name of this rover?

What is Curiosity?

300

Venus rotates on its axis in the opposite direction to most planets, a phenomenon called what?

What is retrograde rotation?

300

ow many continents are there on Earth?

What is seven?

300

Mercury has no atmosphere. True or False?

True

300

How many moons does Saturn have in total?

What is over 80 moons?

400

Olympus Mons, the largest volcano on Mars, is approximately how many times taller than Mount Everest?

What is about 3 times taller?

400

The surface temperature of Venus is hot enough to melt which metal?

What is lead?

400

The Earth's atmosphere is primarily composed of which two gases?

What are nitrogen and oxygen?

400

What is the temperature variation between Mercury's day and night sides?

What is about 600°C (or 1,100°F)?

400

Saturn is primarily composed of which two elements?

 What are hydrogen and helium?

500

Mars has two moons. Can you name both of them?

What are Phobos and Deimos?

500

What feature on Venus's surface is named after the Roman goddess of love and beauty?

What are Venus's "love handles" or "Aphrodite Terra"?

500

What is the approximate diameter of the Earth at the equator?

What is about 12,742 kilometers (or 7,918 miles)?

500

Which spacecraft made multiple flybys of Mercury before finally entering orbit around it in 2011?

 What is MESSENGER (MErcury Surface, Space ENvironment, GEochemistry, and Ranging)?

500

The Cassini-Huygens mission, which studied Saturn and its moons extensively, was a joint effort between NASA, the European Space Agency, and which other space agency?

What is the Italian Space Agency (ASI)?