1.

1 answer:

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<span>1. To investigate the natural world, such as discovering new species. To establish unchanging facts, such as the laws of relativity. To explain natural phenomena, such as migration or evolution. To make useful predictions based on evidence, such as the potential effects of climate change.
2. A controlled experiment is used to isolate and test a mass of information by making use of controls and standards as points of reference.</span>

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