have a listen to this podcast about the recent exam and this short explanation of some more of the paper

we looked at rates of reaction including how the size of marble chips affect the rate of reaction – have a look at the graph above and try and explain why we get this pattern.

Try this at home - point a remote control at a video camera - can you explain what is happening?

For your homework this week you need to read your revision book from pages 74 to 77 and make some notes on series and parallel circuits and current and voltage. You will get some questions on this topic soon.

You can download a copy of the refraction homework that was set today here

We looked at these two topics today

reflection

refraction