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love history [14]
4 years ago
8

You must design a valid experiment to show that there are microorganisms in the air.  What would be your dependent variable?

Biology
2 answers:
JulsSmile [24]4 years ago
3 0
<span>growth of organisms in the broth i hope this helps

</span>
bulgar [2K]4 years ago
3 0
You can carry out a test , 
1- take a sample of the air in a test tube 
2-add limewater to the test tube 
3- result : if it turns milky/cloudy it has microorganisms 
4- reason: because every microorganism respires , and so it produces Carbon dioxide . 
and limewater is the test to show the presence of Carbon dioxide . 
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