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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Through the process of photosynthesis
Answer:
The diagram has no problem
Explanation:
Exactly correct
The correct answer is B) chance
Allele frequencies in a gene pool change completely due to chance.
