Visiting the Red Planet: teacher key

Mars, grade 3 edition, written for 3rd grade. Learn how far away Mars is, how cold it gets, and which robots have explored it.

Read the book. Print this page for the key.

Questions and answers

What are the moons of Mars like?
- Round
- Lumpy, like potatoes (answer)
- Made of ice
What carried Sojourner to Mars in 1997?
- The Mars Pathfinder lander (answer)
- Curiosity
- A helicopter
Mars is about half the width of Earth. A model of Earth is 10 centimeters wide. About how wide should a model of Mars be?
- About 20 centimeters
- About 5 centimeters (answer)
- About 10 centimeters
What is most of the air on Mars made of?
- Oxygen
- Carbon dioxide (answer)
- Water
How long does Phobos take to circle Mars?
- Under 8 hours (answer)
- About a year
- Exactly one day