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| A possible answer to a scientific question. |
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| Is the search for an answer to a scientific question. |
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| An hypothesis is an idea about what might happen in an experiment. |
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| To begin an experiment, you must plan a procedure, or list of steps you will follow |
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| A variable is anything that can change in an experiment. |
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| The variable you CHANGE is the independent variable. |
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| Each repeated experiment is called a trial. |
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| An experiment test only one variable. This variable is called the independent variable. |
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| An observation is information you use your senses to collect. |
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| The information you collect during an investigation or experiment is your data. |
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| A data table organizes the data collected in an experiment. |
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| A bar graph uses bars of different lengths to compare data. |
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| A line graph is a graph that shows how data change, usually over time. |
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| To analyze data means to ask yourself, "What do the data tell me?" |
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| A conclusion is an explanation about what the data show. |
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| An inference is also an explanation. But it is based on experience, not on observation. |
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| A prediction is an idea about what may happen in the future. |
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| A metric ruler measures small distances. |
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| A meterstick, which is 1m long, measures lengths up to a few meters. |
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| Distances grater than a few meters are measured with a tape measure. |
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| Mass is measured with a balance. |
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| A spring scale measures mass. |
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| A graduated cylinder is used to measure the volume of liquids. |
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| A thermometer measures temperature. |
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| A compass is used to find direction. The compass needle always ppints toward the North Pole. |
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| A stopwatch is useful for measuring small lengths of time, such as seconds or fractions of a second. |
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| Microscopes use lenses to magnify, or make things appear larger. |
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| A hand lens, or magnifier, is a hand-held microscope with one lens. It magnifies things only a small amount. |
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| A compound microscope uses two lenses to magnify objects. |
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| The nosepiece of a compound microscope has two or three lenses called objective lenses. |
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| Long distances are measured in kilometers. One km equals 1,000 meters. |
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| In science, you use the Celsius temperature scale. 0 is when water freezes and 100 in when water boils |
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