Polar Ice and Climate Change Quick Check 1 of 51 of 5 Items Question What happened to the Arctic Ocean during the past 40 years?(1 point) Responses It has grown smaller It has grown smaller It has become cooler It has become cooler It has gained more sea ice. It has gained more sea ice. It has become warmer
How much of Earth is comprised of ice?(1 point) Responses about 90 percent about 90 percent about 10 percent about 10 percent about 70 percent about 70 percent about 30 percent
about 10 percent
Which feature of Earth would reflect the greatest amount of incoming sunlight?(1 point) Responses light ocean water light ocean water dark ocean water dark ocean water ice covered by snow ice covered by snow sea ice
ice covered by snow
What is the effect of changing temperature on the Arctic Ocean as observed by scientists over the last few decades?(1 point) Responses There are more areas of open ocean. There are more areas of open ocean. There are no changes in temperature. There are no changes in temperature. There is less saltwater. There is less saltwater. There is more sea ice.
There are more areas of open ocean.
Why has the temperature of the Arctic Ocean changed during the last 40 years?(1 point) Responses Less snow falls in the Arctic now than 40 years ago. Less snow falls in the Arctic now than 40 years ago. More sunlight now reaches Earth than in the past. More sunlight now reaches Earth than in the past. Sea ice has melted, allowing more sunlight to hit the ocean. Sea ice has melted, allowing more sunlight to hit the ocean. Sea ice has produced more salt, causing the cold ocean water to sink.
Sea ice has melted, allowing more sunlight to hit the ocean.
