99.+Drink+Can+Experiment

Radiation is a way heat moves from a hot object to a cooler object. The Sun's surface is about 5000 degrees so heat energy moves from it all the way to earth, some 300,000 kilometres away.
 * Effect of Can Colour on Temperature Change **

**AIM: ** To find out whether colour affects the amount of heat absorbed from the Sun.

**HYPOTHESIS (a prediction with a reason for it): **

**METHOD: ** 1. Measure 100 mL of water with a measuring cylinder and pour it into an aluminium drinking can 2. Measure the initial temperature of the water in the can and record it online 3. Place the can in direct sunlight for 10 minutes, swirling it every minute 4. Measure the final temperature and record it online



**RESULTS (for 100 mL Water):** of the liquid ( °  C)  ||  Rise in temperature ( °  C)  || Names in Group ||
 * |||| <span style="font-family: 'Arial','sans-serif'; font-size: 10pt;">Temperature
 * ^  || <span style="display: block; font-family: 'Arial','sans-serif'; font-size: 10pt; text-align: center;">Initial  || <span style="display: block; font-family: 'Arial','sans-serif'; font-size: 10pt; text-align: center;">Final  ||^   ||
 * Colourless bottle || 21 || 27 || 6 || Liziana, Heetasha and Ann ||
 * Red can || 21 || 26 || 5 || Maddie, Eilish, Paula ||
 * Blue can || 21 || 25 || 4 || Amy Jessie Erin Priya ||
 * Blue can || 20 || 26 || 6 || Callayne Lily Chloe ||
 * Silver can || 21 || 24 || 3 || Sarah, Hra, Livvy ||
 * Silver can || 21 || 24 || 3 || Stefie, Greta, Kate, Gabby ||
 * Green can (long) || 21 || 27 || 6 || Stefie, Greta, Kate, Gabby ||
 * Black can (long) || 21 || 26 || 5 || Alice,Taylor,harriet,Tessa ||

**<span style="font-family: 'Arial','sans-serif'; font-size: 10pt;">VARIABLES: ** <span style="font-family: 'Arial','sans-serif'; font-size: 10pt; line-height: normal; margin: 0cm 0cm 0pt;">We ignore the longer cans and the plastic bottle because they have a different shape. <span style="font-family: Arial,Helvetica,sans-serif; font-size: 10pt;">The **colour** of the cans was the **independent variable**. <span style="font-family: Arial,Helvetica,sans-serif; font-size: 10pt;">The **temperature change** was the **dependent variable**. (It's value depended on the colour) <span style="font-family: Arial,Helvetica,sans-serif; font-size: 10pt;">All other variables (like can shape, amount of water etc. were kept the same.

**<span style="font-family: 'Arial','sans-serif'; font-size: 10pt;">CONCLUSION: ** Coloured cans heat up (rise in temperature) more than silver cans.
 * 1. Describe one possible trend in the data. **

We did not collect enough data to be sure it was really a trend. The differences could be due to other factors like:
 * 2. Explain why we can only say it is a 'possible' trend. **
 * different amounts of water in cans (due to spillage)
 * the different ways the cans were arranged in the sunlight. Were their balels facing in the same direction?

**<span style="font-family: 'Arial','sans-serif'; font-size: 10pt;">DISCUSSION: ** <span style="font-family: 'Arial','sans-serif'; font-size: 10pt; line-height: normal; margin: 0cm 0cm 0pt;">Coloured cans absorb more heat than silver cans. (Silver cans reflect more heat than coloured cans)
 * <span style="color: #9a1919; font-family: 'Arial','sans-serif'; font-size: 10pt; line-height: normal; margin: 0cm 0cm 0pt;">1. Explain the trend above in terms of how heat moves. **

<span style="font-family: 'Arial','sans-serif'; font-size: 10pt; line-height: normal; margin: 0cm 0cm 0pt;">** 2. Discuss how the experiment could be improved. ** <span style="font-family: 'Arial','sans-serif'; font-size: 10pt; line-height: normal; margin: 0cm 0cm 0pt;">We could improve the experiment by
 * <span style="font-family: 'Arial','sans-serif'; font-size: 10pt; line-height: normal; margin: 0cm 0cm 0pt;">leaving the cans in the sunlight for a longer time (e.g. 15 minutes)
 * <span style="font-family: 'Arial','sans-serif'; font-size: 10pt; line-height: normal; margin: 0cm 0cm 0pt;">making sure they all faced the same way
 * <span style="font-family: 'Arial','sans-serif'; font-size: 10pt; line-height: normal; margin: 0cm 0cm 0pt;">painting the cans with different colours
 * <span style="font-family: 'Arial','sans-serif'; font-size: 10pt; line-height: normal; margin: 0cm 0cm 0pt;">use only one shape of can