Focus and zoom the camera on the beaker. Ideally, the field of view doesn't show any edges of the glass. Do not place the black fabric anywhere above the candle. The fabric can melt or catch fire.

Presenter 2: The bigger the measuring beaker, the more air and the longer the candle burnt. Presenter 1: So, we have seen an experiment looking at how long a candle burns under different beakers.

Presenter 1: We are going to be collecting readings for an experiment which involves timing how long a candle stays burning under a beaker. A graph is a great way to paint a picture of what the ...