7.5.1 Check Your Understanding

It was -5°C in Copenhagen and -12°C in Oslo. Which city was colder?

• Copenhagen

• Oslo

• Both are equally cold

• Cannot be determined

A fish is 12 meters below the surface of the ocean. What is its elevation?

• -12 meters

• 12 meters

• 0 meters

• 24 meters

A sea bird is 28 meters above the surface of the ocean. What is its elevation?

• -28 meters

• 28 meters

• 0 meters

• 56 meters

Compare the numbers: 3 ___ -3.

• a) >

• b) <

• c) =

Compare the numbers: 12 ___ 24.

• a) >

• b) <

• c) =

Compare the numbers: -12 ___ -24.

• a) >

• b) <

• c) =

Compare the numbers: -7.2 ___ -7.

• a) >

• b) <

• c) =

Compare the numbers: -4/5 ___ -5/4.

• a) >

• b) <

• c) =

Compare the numbers: -2/3 ___ 1/3.

• a) >

• b) <

• c) =

Which of the following is true?

• -5°C is warmer than -12°C

• -5°C is colder than -12°C

• -5°C is the same as -12°C

• Cannot be determined.