Answer:
It is important to have more than one piece of evidence to make sure that the evidence is actually evidence. Or in other words, that the evidence is proven true. With only one piece of evidence, you can't be fully sure if calculations were correct, if the source was trustworthy, etc.
Multiple evidence is kinda like double checking math problems. If you don't do it, you can't be 100% certain the answer is correct.
Answer:
i think they must be able to create good hypothesis based on research.
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Explanation:
Usually static electricity is present in balloons when rubbing them together. There is often an imbalance of positive and negative charges in the balloons which causes the static electricity.
