Download Experimental Science – IP

Experimental Science – Independent Practice
Experimental Science – Independent Practice
1) A botanist wanted to determine the effect of different colored lights on plant
growth. To do this, she conducted the experiment illustrated below. She grew
one plant under blue light and one under red light and gave each plant the
amount of water shown.
1) A botanist wanted to determine the effect of different colored lights on plant
growth. To do this, she conducted the experiment illustrated below. She grew
one plant under blue light and one under red light and gave each plant the
amount of water shown.
At the end of the experiment, Plant 1 had grown 10 cm and Plant 2 had grown
5 cm. The botanist concluded that plants grow better under red light.
At the end of the experiment, Plant 1 had grown 10 cm and Plant 2 had grown
5 cm. The botanist concluded that plants grow better under red light.
Part A: Do you agree with the botanist’s conclusion? Explain why or why not.
Part A: Do you agree with the botanist’s conclusion? Explain why or why not.
Part B: How would you revise the experiment to make it more scientifically valid?
Use the spaces below to show the variables in your redesigned experiment.
Plant 1
Plant 2
Light
Temperature
Water
Time
Plant
Part B: How would you revise the experiment to make it more scientifically valid?
Use the spaces below to show the variables in your redesigned experiment.
Plant 1
Plant 2
Light
Temperature
Water
Time
Plant
2) Bones tend to become brittle with age. A disease called osteoporosis causes
bones to become less dense and as a result, bones break more easily.
Osteoporosis is more common among older women, because they produce less
of a hormone called estrogen, which aids in bone formation. Many doctors
hypothesize that older women who take estrogen supplements will experience
fewer broken bones.
2) Bones tend to become brittle with age. A disease called osteoporosis causes
bones to become less dense and as a result, bones break more easily.
Osteoporosis is more common among older women, because they produce less
of a hormone called estrogen, which aids in bone formation. Many doctors
hypothesize that older women who take estrogen supplements will experience
fewer broken bones.
Part A: Describe how an experiment could be designed to test this hypothesis.
Part A: Describe how an experiment could be designed to test this hypothesis.
Part B: What would be the outcome variable (dependent variable)?
Part B: What would be the outcome variable (dependent variable)?
Part C: What would be the test variable (independent variable)?
Part C: What would be the test variable (independent variable)?