7th Grade Life Science Quiz: Scientific Method and Graphing Study Guide
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7 Terms
A hypothesis must be:
Testable
(PART 1) A student wants to see if different amounts of light affect plant growth. They use three identical plants, giving one 4 hours of light a day, another 8 hours, and the third 12 hours. All other conditions like water and soil are kept the same. After two weeks, they measure the height of each plant. What is the independent (manipulated) variable in this experiment?
The amount of sunlight
(PART 2) The height of plant 1 is 4 inches (it had 4 hours of sunlight), the height of plant 2 is 6 inches (it had 8 hours of sunlight and the height of plant three is 3 inches (it had 12 hours of sunlight). Based on this data, the scientist would:
Determine that 8 hours is perfect.
A hypothesis is…:
An educated guess
When using the scientific method, the group used as the standard comparison is the
control group
How many variables should an experiment have?
One