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| Observation is the act of noticing and describing events or processes in a careful, orderly way. |
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| Science is an organized way of gathering and analyzing evidence about the natural world. |
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| An inference is a logical interpretation based on what scientists already know. |
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| A hypothesis is a scientific explanation for a set of observations that can be tested in ways that support or reject it. |
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| A controlled experiment is where only one variable is changed. |
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| The variable that is deliberately changed is called the independent variable. |
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| The variable that is observed and that changes in response to the independent variable is called the dependent variable. |
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| A control group is exposed to the same conditions as the experimental group except for one independent variable. |
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| Detailed records of experimental observations, gathering information is called data. |
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