Experimental Controls
Biology ⇒ Scientific Inquiry and Experimental Design in Biology
Experimental Controls starts at 7 and continues till grade 12.
QuestionsToday has an evolving set of questions to continuously challenge students so that their knowledge grows in Experimental Controls.
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See sample questions for grade 9
A researcher wants to test if a new medicine lowers blood pressure. She gives the medicine to one group and a sugar pill to another. What is the sugar pill group called?
A scientist is testing the effect of light on plant growth. She uses two groups: one in sunlight and one in darkness. Which is the control group?
A student is testing the effect of different fertilizers on plant growth. She uses the same type of plant, same soil, and same amount of water for all groups. What are these examples of?
A student wants to test if music affects plant growth. She plays music to one group of plants and not to another. What is the independent variable?
Describe how a lack of control variables can affect the outcome of an experiment.
Describe what could happen if an experiment does not include a control group.
Explain the difference between a control group and a controlled variable.
Explain the role of a placebo in a controlled experiment.
Explain why random assignment is important when creating control and experimental groups.
In a plant growth experiment, if all plants receive the same amount of water except one group, which group is the control?
What is the main purpose of an experimental control in a scientific investigation?
Why is it important to keep control variables constant in an experiment?
Why might an experiment include both positive and negative controls?
