What happened to the Arctic Ocean during the past 40 years?
It has become less salty
It has gained more sea ice
It has become warmer
It has grown smaller
Polar Ice and Climate Change quick check
1) it has become warmer.
2) about 10 percent.
3) ice covered by snow.
4) There are more areas of open ocean.
5) Sea ice has melted, allowing more sunlight to hit the ocean.
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