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Understand that an experimental control refers to a group of samples that arent exposed to the changes or manipulations made by the scientist.
Virtual labs are interactive science simulations that students complete online, from their personal devices. Each lab places students in real world scenarios, where they must apply their knowledge to solve real world problems.
A controlled experiment involves having a control group and one or more experimental groups. In the control group, the test subjects are kept in their normal state, while one variable under study is changed in each experimental group.
The group that receives the treatment in an experiment (here, the watered pot) is called the experimental group, while the group that does not receive the treatment (here, the dry pot) is called the control group. The control group provides a baseline that lets us see if the treatment has an effect.
An example of a control in science would be cells that get no treatment in an experiment. Say there is a scientist testing how a new drug causes cells to grow. One group, the experimental group would receive the drug and the other would receive a placebo. The group that received the placebo is the control group.

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When possible, scientists test their hypotheses using controlled experiments. A controlled experiment is a scientific test done under controlled conditions, meaning that just one (or a few) factors are changed at a time, while all others are kept constant.
When conducting an experiment, a control is an element that remains unchanged or unaffected by other variables. Its used as a benchmark or a point of comparison against which other test results are measured. Controls are typically used in science experiments, business research, cosmetic testing and medication testing.
Experimental control is demonstrated by the extent that the level of responding changes to conform each new criterion.

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