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1
If you were standing on Mars, would you weigh more or less than you do on Earth?
Less, because Mars has weaker gravity.
1
This is not a planet. It orbits Earth. It has no atmosphere like Earth's. Humans have walked on it. It can affect ocean tides. What is this?
The moon
1
Can astronauts hear sound normally in outer space? Why?
No. Sound needs a medium such as air to travel.
1
Who was the first person to walk on the Moon?
Neil Armstrong
2
This is made by humans. It travels around Earth. It can take photographs of Earth. It can help scientists study weather and climate. What is this?
A satelite
2
Why can't astronauts simply breathe the air in space?
Space has essentially no breathable atmosphere.
2
I make my own light. I am much larger than Earth. The planets in our Solar System orbit me. What am I?
The sun
2
Why does Earth look small from the Moon?
The Moon is much farther away than the places on Earth we normally see.
3
Mars has two moons. Yes or No?
Yes. Mars has two small, irregularly shaped moons named Phobos and Deimos.
3
What force keeps planets in orbit around the Sun?
Gravity
3
The Sun is a star. True or False?
True. Because it is a massive, glowing ball of gas that creates its own light and heat through nuclear fusion.
3
Why do astronauts need spacesuits?
To provide oxygen and protect them from the extreme environment of space.