Which of the following did the Antartic Treaty do for Antartica?
A. It gave rule over the area to a single nation.
B. It established permanent settlements in Antrartica.
C. It outlawed use of harmful substances that were destroying the ozone layer.
D. It set Antartica aside for scientific research.
D. It set Antartica aside for scientific research.
What is pack ice?
A. large masses of compressed ice that cover land
B. large, slow-moving bodies of ice that move over land
C. large, floating masses of ice where groups of penguins live
D. large, seasonal masses of ice that form and float on water
D. large, seasonal masses of ice that form and float on water
Why is the ozone layer in Antartica significant?
A. It is getting thinner, allowing more harmful ultraviolet rays to reach Earth.
B. It is a valuable natural resources, but harvesting it could harm native wildlife.
C. It exists nowhere else, so scientists must travel there to study its properties.
D. It could grow dangerously large if climate change continues.