Climate Change at the Poles

Question 1

Scientists measured that the Arctic sea‑ice area was about 100 million square kilometres in the year 1980. If the ice keeps shrinking by about 13 % every ten years, roughly how many million square kilometres would be left in the year 2020?

Accepted Answer

60 million

Answer

70 million

Answer

80 million

Answer

90 million

Question 2

Which statement correctly describes how Arctic sea ice has changed since 1979?

Accepted Answer

It has been shrinking by about 13% each decade.

Answer

It has been growing by about 13% each decade.

Answer

It has been shrinking by about 5% each decade.

Answer

It has stayed about the same amount over time.

Question 3

Scientists say the Arctic sea‑ice area gets about 13% smaller every ten years. If the ice covered 100 square‑units in 1979, roughly how many square‑units would still be covered after 20 years if this rate stays the same?

Accepted Answer

76

Answer

87

Answer

66

Answer

100

Try three questions

Scientists measured that the Arctic sea‑ice area was about 100 million square kilometres in the year 1980. If the ice keeps shrinking by about 13 % every ten years, roughly how many million square kilometres would be left in the year 2020?

Which statement correctly describes how Arctic sea ice has changed since 1979?

Scientists say the Arctic sea‑ice area gets about 13% smaller every ten years. If the ice covered 100 square‑units in 1979, roughly how many square‑units would still be covered after 20 years if this rate stays the same?

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