rusting of iron is a chemical change because it is two substances reacting together to make a new substance. When iron rusts, iron molecules react with oxygen molecules to make a compound called iron oxide. Rusting would only be a physical change if iron molecules remained pure iron throughout the process.
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Answer:they need someone of the opposite sex to mate with them
Explanation:
The answer to that answer is B
<span>Matter is recycled within and between ecosystems through biogeochemical cycles.
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Answer:
crossing over
Explanation:
This occurs between prophase 1 and metaphase 1.
