Robots on a Red Planet: teacher key

Aliens and UFOs, grade 2 edition, written for 2nd grade. How do you learn about a world you cannot visit yourself? Scientists send robots to Mars and point telescopes at far away stars.

Read the book. Print this page for the key.

Questions and answers

1. Why does Mars look red?
   • It is very hot
   • There is rusty iron in its ground (answer)
   • It is covered in paint
2. What kind of world is Mars?
   • A warm ocean world
   • A cold desert world (answer)
   • A world of ice only
3. What is a rover?
   • A star
   • A kind of telescope
   • A robot with wheels (answer)
4. What is a planet around another star called?
   • An exoplanet (answer)
   • A rover
   • A desert
5. Why do scientists send rovers to Mars?
   • To paint it red
   • To learn about it up close (answer)
   • To bring it home

Words

• rovers: wheeled robots
• exoplanet: far-off planet
• telescopes: seeing tools