Drawing the Polar Lines: teacher key

The Arctic and Antarctica, grade 7 edition, written for 7th grade. Where does the Arctic begin, and who lives at each end of the Earth? Follow the lines, the ocean, the animals and one bird that visits both poles.

Read the book. Print this page for the key.

Questions and answers

1. What is the Arctic Circle?
   • A line of latitude at about 66.5 degrees north (answer)
   • A kind of ice
   • A sea in Antarctica
2. Why is the Arctic Ocean the least salty?
   • It has no rivers
   • Low evaporation and fresh water from rivers and glaciers (answer)
   • It is the deepest
3. What do Arctic foxes' coats do in summer?
   • Turn white
   • Turn brown or gray to hide among rocks and plants (answer)
   • Fall out
4. How can a herd of musk oxen protect its young from wolves?
   • By running south
   • By forming a ring with the young in the middle (answer)
   • By digging dens
5. What do Arctic terns hold the record for?
   • Longest migration of any animal (answer)
   • Fastest dive
   • Largest eggs

Words

• latitude: distance from equator
• lichens: tiny living things
• migration: long seasonal trip