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1、ObserveI can see the flame. The flame has two colours. I can hear the crackle. I can smellburning. When you study something closely, you are observing. You can look at it, listen to it, touch it, smell it or taste it.整理课件Measure12 cm125 cmA ruler is a measuring instrument. When you use a measuring i

2、nstrument, you are measuring. A measurement always has a number and a unit.整理课件CompareWho is taller?If you have two or more objects, you can compare them.整理课件ClassifyI want to group these animals by the number of their legs.I want to group these animals by how they move.When you put things into grou

3、ps by certain features, you are classifying.整理课件ExperimentObserve something. Think about your results. Did you learn something about science? You are experimenting.整理课件Fair testIf you want to compare results, you should do a fair test. How do you make a fair test? Change only one condition. Keep the

4、 other conditions the same.We have to keep the same distance between the magnet and the paperclips.We have to use paperclips of the same size.整理课件Design and TechnologyHow can we tell others about our island?We can make a lighthouse. Lets connect the bulb to a battery.Can you see the light?Can we make

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