How quickly does a birthday candle burn? Part One Purpose To determine the rate at which a birthday candle burns. Hypothesis Do you think a birthday candle bums at a constant rate? Or does it slow down as it gets shorter? Sketch a graph of candle height (vertical axis) vs. time (horizontal axis) · to illustrate your hypothesis. Data Make a data table to record the height of a birthday candle at elapsed burning times of 0, 3, 6, 9, and 12 minutes. Materials Birthday candle Ruler lump of Small clay Matches or ceramic container Procedure Using a ruler, measure the height of your birthday candle. a small lump of clay on your table. Press the candle into the clay so that it stands securely upright. Carefully trial the candle with a match and allow it to bum for three minutes. Then blow out the candle, remove it from the clay, and measure it. Record the new height of your data table. Repeat step 3 more times, for a total burning time of 12 minutes. Analysis Graph the height and burning time data from your data table. What is the manipulated variable? Label your axes correctly. Using your graph (show work by marking on the graph itself), estimate the height of the birthday candle at two minutes. How much height did the candle lose in two minutes? How long would it take for the candle to reach 2.5 cm? How long would it take for the candle to burn out? Calculate the rate of burning (in mm/min) for each of your time intervals using the following procedure. First calculate the amount of the candle that burned. For each interval, subtract the final candle height from the previous trial's candle height, and then divide this number by three minutes (the interval time). This is your rate in mm/min Calculate all four burning rates, and
How quickly does a birthday candle burn? Part One Purpose To determine the rate at which a birthday candle burns. Hypothesis Do you think a birthday candle bums at a constant rate? Or does it slow down as it gets shorter? Sketch a graph of candle height (vertical axis) vs. time (horizontal axis) · to illustrate your hypothesis. Data Make a data table to record the height of a birthday candle at elapsed burning times of 0, 3, 6, 9, and 12 minutes. Materials Birthday candle Ruler Small lump of clay Matches or ceramic container Procedure Using a ruler, measure the height of your birthday candle. a small lump of clay on your table. Press the candle into the clay so that it stands securely upright. Carefully the candle with a match and allow it to bum for three minutes. Then blow out the candle, remove it from the clay, and measure it. Record the new height of your data table. Repeat step 3 more times, for a total burning time of 12 minutes. Analysis Graph the height and burning time data from your data table. What is the manipulated variable? Label your axes correctly. Using your graph (show work by marking on the graph itself), estimate the height of the birthday candle at two minutes. How much height did the candle lose in two minutes? How long would it take for the candle to reach 2.5 cm? How long would it take for the candle to burn out? Calculate the rate of burning (in mm/min) for each of your time intervals using the following procedure. First calculate the amount of the candle that burned. For each interval, subtract the final candle height from the previous trial's candle height, and then divide this number by three minutes (the interval time). This is your rate in mm/min Calculate all four burning rates, and trial