Earth needs heat rays because it keeps everything alive.
First we cut a circle on a piece of paper then bent the sides and made a little hole in the centre. Next we put some string through the middle. They are meant to spin and twirl. The biggest ones twirled the best and the smallest twirled the worst. When we held them above a lit candle they twirled by heat. The type of movement was convection.
by Zach
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