The atoms should onky have same no. of protons+electrons.
The answer is D, Because dinosaurs appears in the Triassic period while insects appeared in the Devonian period which is about 160 million years about, which rules out A and B. Humans have been on Earth for almost 3 million years, which is nothing compared to the history of life in earth, which about 4,000 million years of life history, so D
Answer:
geologists use rock samples and direct evidence to prove what earth's structure is like.
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Answer:
Is this USA Test prep?
I believe that it is all except the 2nd one
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