Term
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Definition
| An aspect of an experiment that changes during the course of the experiment |
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Term
| Control (of an experiment) |
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Definition
| The variable or part of the experiment to which all others will be compared. |
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Term
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Definition
| Experiments in which the participants do not know whether or not they are a part of the control group |
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Term
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Definition
| Experiments in which neither the participants nor the people analyzing the results know who is in the control group. |
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Term
When is an experimental variable good?
When should it be reduced or eliminated? |
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Definition
| An experimental variable is good when you are using it to learn something from the experiment. An experimental variable should be reduced or eliminated when it affects the results of the experiment but you do not learn anything from it. |
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Term
| Why can a carefully placed needle float on water, even though the needle is denser the water? |
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Definition
| The needle floats because of surface tension. |
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Term
| What does soap do to the surface tension of water? |
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Definition
| Soap Reduces the surface tension of the water. |
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