lightupscience(科學(xué))3b課件skill

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. Measure1 2 cm 1 2 5 cmA ruler is a measuring instrument. When you use a measuring instrument, you are measuring. A measurement always has a number and a unit. CompareWho is taller?If you have two or more objects, you can compare them. 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 groups by certain features, you are classifying. ExperimentObserve something. Think about your results. Did you learn something about science? You are experimenting. 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 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. 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 it better? Think againFind a need Make itTest itYes, I can.