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Y11 atoms 1
 

Y11 atoms 1

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    Y11 atoms 1 Y11 atoms 1 Presentation Transcript

    • What is science? Purpose? Features? Operations? Prepare to share a thought about this question
    • Scientific Models Term 1 – Atoms and Matter Atoms – Lesson 1
    • Learning Intentions.. To understand that scientists use models to explain and make predictions
    • Models
    • A model is … a simple system which reveals important properties of a more complicated system you wish to understand. simple The physical layout of proposed offices
    • Green house effect Is a scientific model used to explain the effect of increased carbon dioxide levels on the average temperature of the earth. It is an example of an analogy The earth has very few similarities to a green house and it’s climate is extremely complicated
    • Mathematical Models 2 E=mc The most famous formula in science. What does it mean? Energy and mass are equivalent
    • Visual models - atoms All models have limitations because they are simple. Neither of these models is an atom. Both of these models are useful. There are tons of atom models Identifying sub atomic particles x Li x x Predicting the reactions of lithium
    • Size models Atoms also generate lots of size models If one atom in an apple was the size of an apple then the apple would be the size of the earth. If an atom is the size of the MCG the nucleus would be the size of cricket ball at the wicket.
    • Scientific model “ a testable idea that tells a story about what happens in nature” “a description of nature that can predict things about many similar situations” “identifies and generalises patterns in observations” What makes a good scientific model?
    • A good model… Explains lots Is as simple as possible Makes accurate predictions Is testable Can be used to explain other things (eg. gravity)
    • Why do they change? New data. Doesn’t work in new or different situations. What happens? Replaced (steady state universe) Modified Limited (only use the model in particular circumstances)
    • GROUP TASK – CREATE and DESCRIBE YOUR OWN MODEL Success Criteria It must improve understanding of a complicated phenomena. It must be simple to understand It can be visual, analogous or even mathematical. It doesn’t have to be scientific. Presented as a poster and explained verbally
    • Is light a wave or a particle? This is an inane question. Why? Hint - there two models of em radiation the wave model and the quantum model