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?
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?
In a study testing the effect of a new fertilizer on crop yield, what would be an appropriate control group? (1) Crops with no fertilizer, (2) Crops with double fertilizer, (3) Crops with a different fertilizer, (4) Crops with extra water
In an experiment testing a new drug, what would be an appropriate negative control? (1) Giving the drug to all subjects, (2) Giving a placebo to some subjects, (3) Giving a higher dose to some subjects, (4) Not measuring any results
Which of the following best describes a control group? (1) The group that receives the experimental treatment, (2) The group that is left unchanged for comparison, (3) The group that receives double the treatment, (4) The group that is not measured
Which of the following best describes a negative control? (1) A group where no response is expected, (2) A group where a positive result is expected, (3) A group with double the treatment, (4) A group with random variables
Fill in the blank: A __________ control is used to show what a positive result looks like in an experiment.
Fill in the blank: A __________ experiment is one in which all variables except the one being tested are kept constant.
Fill in the blank: A __________ is a factor that can change in an experiment.
Fill in the blank: A variable that is kept the same throughout an experiment is called a __________ variable.
True or False: A control group is always necessary in every scientific experiment.
True or False: A control variable is a factor that is intentionally changed during an experiment.
True or False: A positive control is expected to show no change in the dependent variable.
True or False: A well-designed experiment should have only one independent variable.
