Hey guys, so I'm stuck on a question for a practice test, and I don't understand why the answer is wrong.
What do ice cores preserve that allow us to understand more about past climates?
a) They show the granular composition of the snow at the time, which shows the terrestrial elements most prevalent during that period
b) They capture debris that reflects the sedimentary elements on the surface at the time
c) They capture atmospheric air when they are formed, reflecting the air quality at the time
d) Their radioactivity makes it easy to capture information on the history of the ice core.
My answer was c, but the correct answer is d. Could you guys explain why?
2017-2018 Events: Chemistry Lab, Dynamic Planet, Microbe Mission, Experimental Design, Rocks and Minerals
2018-2019 Events: Dynamic Planet, Astronomy, Sounds of Music, Circuit Lab, Geologic Mapping