8th Grade Science Project: Chlorine Tolerance in Lima Beans

Experimental Design Tips

Equal light and liquid volume for all 70 cups.
Maximize light; water when soil surface feels dry.
Chlorine toxicity shows as brown leaf edges, wilting, yellowing—may take 1+ week at low concentrations.

Tolerance varies by species; your data will define the threshold for lima beans. Share results if time allows!

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