Where can you find ancient ice?
A) Greenland
B) Antarctica
C) Canada
D) Alaska
A) Greenland
B) Antarctica
D) Alaska
Choose the best response. Pick only ONE answer.
Where can you find ancient ice?
A) Greenland
B) Antarctica
C) Canada
D) Alaska
B) Antarctica
What are all the steps of collecting ancient air?
A) Pump out modern air, melt ice, refreeze ice, pump out ancient air
B) Melt ice and collect air
C) Squeeze the ice until the ancient air comes out
D) Crush the ice so the trapped ancient air comes out
A) Pump out modern air, melt ice, refreeze ice, pump out ancient air
Ancient isotypes of nitrogen tell us about....
A) ancient carbon dioxide levels
B) ancient animals
C) ancient temperature