Something simple?
Hmm, how about a diagram of a fod chain? Its simple, if you dont have a printer to print the images of a food chain, or animals, then just try to draw it the best you can...
Make it into a poster, write some information about the animals, who eats who, are they a carnivor, herbivor, you know... Stuff like that :)
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<em>Hope this helped! :)</em>
I think it would be by the change in speed
For example if light travels from air to water it will slow down causing it to travel at a different angle/direction
The answer to this is c the chime of thunder'
<span>The closest planet to the sun is Mercury. After Mercury the order of the planets is Venus, Earth, Mars, Jupiter, Saturn, Uranus and Neptune. </span>
