Monday, 7 September 2009

NEW Earthlearningidea - Slopes and angles of rest

Our new Earthlearningidea is all about slopes and angles of rest - 'Sandcastles and slopes: what makes sandcastles and slopes collapse?'
Ask the pupils if they have ever built a big sandcastle. What was the steepest angle they could build the side walls of the castle? Could they make a steeper wall if the sand was dampened? Questions like these go well beyond the playground or beach. Many people have been killed by the collapse of unstable slopes of loose rock or sand. This activity investigates the factors which affect the angle at which loose materials rest before they begin to slide.
Please let us know how your pupils get on by writing a comment on this post or contacting us by email.

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