Scientific Method - Manipulated and Responding Variables In the same science fair, Tina asks the question "Does caffeine increase the heart rate of an earthworm?" In Test 1, shemeasures the heart rate

Scientific Method - Manipulated and Responding Variables

In the same science fair, Tina asks the question "Does caffeine increase
the heart rate of an earthworm?" In Test 1, shemeasures the heart rate by
looking at the earthworm under a microscope, the earthworm has a heart rate of 50 bpm (beats per minute). In Test 2,
she places a few drops of caffeine on the earthworm's skin and measures the rate again. In this test, the heart rate is 68

8) Tina's experiment should have included a hypothesis. In a complete sentence, suggest a hypothesis for Tina’s

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