Biology

Joyce Walsh

17 March, 22:39

Which of the following is an example of how a scientist might use a model? Microscopes are used to magnify a group of cells on sets of slides. Marbles placed inside a hollow sphere are used to describe protons in a nucleus. A wrench is used to tighten a nut onto a piece of wood.

Stopwatches measure the amount of time it takes for runners to complete a mil

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