science experiment for kids at school

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DiscoverED Covering topics such as earth, animals, technology, water, biology, chemistry and space, these science lesson plans and activities are perfect for teaching students the basics of science. Challenge kids from an elementary to high school level with science activities that they will enjoy.

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slide 1:

In one of the hands­on investigations as part of Discovered program we had  a fun activity that models the circulatory system of the human body. This is a  learning from teaching  that particular investigation. Models are an excellent tool to teach science. But not all models are exact  replicas of the system that is being explained. science experiments in primary school Even though every model requires a certain degree of abstract relation  between the components of the model and the components of the system  each of them would have a slightly different level of abstraction. 1. For example  a physical model of the eye would have convincing  similarity to the way a real eye looks. If it is a scale model then there is  similarity in proportions of the original system eye and the model  itself.  2. But when we use the model to talk about how the lens in the eye works it requires a bit of imagination to see how the lens of the eye changes  its shape using the lens in the physical model That does not actually  show the change in lens shape of eye. 3. If we talk about how the lens helps in focusing the image on the retina  the physical model is not much help as the person has to imagine how  the lens would work and how the image is focussed onto the retina. The same model has increasingly higher levels of abstraction required  by the learner in the 2 and 3 rd  example. This is because the comparison  between the model and the original phenomena is not similar.

slide 2:

The working of lens in the eye could be better explained using a drop of water  and how its focal point changes when it is stretched. The thicker the water  drop the more different the image. This changes much like the lens in the  eye. This requires less effort by the learner to relate both phenomena. science experiment for kids at school 4. Similarly for explaining the way image is focussed on the retna we could use a convex lens on an optcal bench to focus a picture on a white screen. This is far easier for the learner to relate to than just explaining about focus using a clay physical model of the eye. 5. Thus I believe when designing a model for use in a classroom one must keep this abstracton minimal. But the discussion is open.

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