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1、,Observe,When you study something closely, you are observing. You can use a tool such as a hand lens.,Measure,35 ,A thermometer or a scale is a measuring instrument. When you use a measuring instrument, you are measuring. A measurement always has a number and a unit.,40 g,Compare,If you have two or

2、more objects, you can observe or measure them to compare them.,Which beaker of water is hotter?,Sequence,Take some objects. Choose a feature. Put the objects in order. This is a sequence.,Model,A model helps you to understand the real thing. It can be bigger or smaller than the real thing.,Predict,W

3、hen you say what you think will happen, you are predicting.,I think it will rain tomorrow.,Experiment,Observe and measure something. Think about your results. Did you learn something about science? You are experimenting.,Fair test,If you want to compare results, it helps to do a fair test. How do you make a fair test? Change only one condition. Keep the other conditions the same.,We have to keep the amount of tea the same.,We have to use the same size cups.,Does tea cool more quickly in

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