Because scientists cannot travel back in time 350,000 years, infer how scientists determined the Carbon dioxide levels in the gr
aph above?
A.
they use a computer model
B.
they used fossils of dinosaurs to measure the carbon dioxide in them
C.
the scientists from that time period kept records we could interpret
D.
they used ice cores and tree rings called proxy indicators
1 answer:
Answer:
they use a computer model
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