Experimental Controls
Biology ⇒ Scientific Inquiry and Experimental Design in Biology
Experimental Controls starts at 7 and continues till grade 12.
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See sample questions for grade 12
A researcher is testing the effect of temperature on enzyme activity. She includes a sample with a known enzyme concentration and optimal temperature. What type of control is this?
A scientist is testing the effect of a new antibiotic on bacteria. She includes a group of bacteria that receives no antibiotic. What is this group called?
Describe a scenario in which a positive control is necessary in a biological experiment.
Describe how a double-blind experiment helps improve the reliability of control groups.
Describe the difference between a control group and an experimental group in a scientific study.
Explain how the lack of a proper control can lead to invalid conclusions in an experiment.
Explain the difference between a negative control and a placebo control.
Explain why it is important to report the use of controls in scientific publications.
Explain why randomization is important when assigning subjects to control and experimental groups.
In a drug trial, what is the purpose of giving a placebo to the control group?
In an experiment, why is it important to keep all variables except the independent variable constant between the control and experimental groups?
In an experiment, why might a researcher use more than one type of control?
What is the main purpose of an experimental control in a scientific investigation?
Why is it important to include both positive and negative controls in a biological experiment?
