At the end of this unit
in terms of scientific enquiry
most pupils will: make measurements of light intensity using a light sensor and compare the effects of materials on light; make predictions about the reflection of light at plane surfaces, measure angles with precision and make generalisations from the data; frame a question about light and colour and plan how to investigate it
some pupils will not have made so much progress and will: classify materials as opaque, transparent, translucent, reflectors or absorbers, on the basis of data from light sensors or visually; identify patterns in angular measurements of reflected rays of light; with help, investigate a question about colour and light
some pupils will have progressed further and will: draw conclusions from their data, informed by scientific understanding about reflection and refraction of light at plane surfaces; make predictions about image formation using the law of reflection or the patterns of behaviour from refraction; make sufficient observations when investigating colour to draw valid conclusions
in terms of physical processes
most pupils will: recognise that light travels in straight lines at very high speed; represent the path of light by rays; describe how light is reflected and refracted at plane surfaces; explain the origin of colour in the dispersion of white light and describe the effects of coloured filters and different coloured lights on the appearance of coloured objects; give an example of how colour is important in everyday life
some pupils will not have made so much progress and will: describe how light is reflected at plane surfaces and describe reflected images; describe the effect of a prism on white light and recognise that filters and coloured objects absorb some colours and transmit or reflect others
some pupils will have progressed further and will: calculate the time for light to travel,
eg from the Sun; explain the appearance of coloured objects in coloured lights
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