WHICH COLOR ABSORBS THE MOST HEAT ?

BLACK,BROWN,PURPLE,BLUE OR YELLOW? BY J. MOLINS & G.VECINO

BACKGROUND RESEARCH

We've searched about how does light affects the colours and we concluded with this: Dark colors absorb more heat compared to other colors because they absorb more light, which means more energy. So brighter colors don’t asorb as much as heat because light reflects on them. For example: black absorbs the most heat because they don’t reflect any color, it keeps all of them however, white will not heat as much as black because it reflects more light, causing it to heat up slower.

HYPOTHESIS

If we heat them all with the same amount of heat and time, then black will increase the temperature the most.

Big image

EXPERIMENT

To make a fair test, we pick up five din-A4 sized cardstocks from the same seller, same size ,same weight all different in colour. We pick the following colors: BLACK,BLUE,YELLOW,BROWN AND PURPLE.

We fold in half all the cardstocks and we put the in a table with a small aperture in the side which on we can put the thermometer in. We pick up the chronometer and start.


It's important to point out that the cardstock could've heated up before the experiment but we can not avoid this problem. It would be difficult tu fold them all in time and place them in the same time, we should have lots of hands to do that.


INSTRUMENTS & MATERIAL

-Thermometer (2x)

-Coloured cardstocks

-Sun

-Chronometer

RESULTS

The starter temperature was 20º. After 30' we saw that the temperatures of the foils were the following. Every 10' we measured the temperatures to see how it was going


TEMPERATURES IN CELSIUS:

The first one is 10 minutes from start. The second one in 20 and the third one is the final one(30).



Black temperatures: 22.5, 26, 30.5

Yellow temperatures: 21, 23, 24.5

Blue temperatures: 21.5, 24, 26.5

Brown temperatures: 22, 25, 27

Purple temperatures: 22, 25.5, 28.5

CONCLUSIONS

We have made an experiment to see how some colours reacted to light(heat) and so, as we predicted, black was the colour that heated up the most on our experiment.

Yellow was the color that heated up the less in the experiment because yellow is a brighter color, which reflects more light (heat).