Tag Archives: The Scientific Method

Juniors Explore The Scientific Method with Petri Dishes

Submitted by Karen Grealy

Metro Denver


Our Girl Scout Junior Troop explored The Scientific Method by forming a question and hypothesis about bacteria in their homes. Once they formed their hypothesis, they used agar plates to test and analyze their results. To the surprise of the Girl Scouts, the remote controls they tested grew more bacterial and mold colonies than the toilet, cat box, and boot samples. One girl had a tough time growing any bacteria. Her conclusion was that because she stored her petri dish in a windowsill, the UV rays killed her bacteria. The Girl Scouts are eager to start placing their remote controls in the sun to see if they get fewer bacterial colonies when they test again.

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