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Why are some colours cooler than others? 

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Why are some colours cooler than others? 

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Have you ever noticed how in Winter we wear dark coloured clothes and in Summer we wear lighter coloured clothes?

Is there a reason for this?

Click on the link below. Follow the instructions and perform the experiment.

Keep a record of what you work. When you are finished, create a post in this padlet and tell us what you did in detail.

Use full sentences. A picture would be nice too!

Remember to include your name, surname and class. Look at the example to help you.

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This is an example of what is expected from you. Write your name, surname and class at the top of the post.

In this space, tell us how you conducted the experiment and what you found out.

If you want you can also upload a photo of your experiment by clicking the upload icon (the one with the arrow facing up).

Have fun!

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I tried to do the experiment even though today was not really sunny outside.
I did not have any coloured papers available at home so I tried to use something else instead for my experiment.  I took 2 glasses and filled them up with tap water, I left 1 with plain water and in the second glass I put some coffee for colour.  I left the 2 glasses outside on the balcony for about 2 hours.  The temperature in both glasses at the start of the experiment was at 22 degrees each.  After 2 full hours and although there was not much sun outside the black cup was warmer than the other.  The plain cup remained at 22 degrees whilst the black cup was at 23 degrees.

Thank you

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it is different bieacas of the laite

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First I wrapped both glasses, one with white paper and the other one in black paper.
After that I poured the same amount of water in each glass.
I placed both glasses in the window sill ( as seen in the picture attached ).
I could not check the temperature as my thermometer could not read  such low temperature.
After three hours I checked both glasses and I could feel that the glass with the black paper was warmer the the glass with the white paper.
Thank you.

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I started by grabbing two glass gups and filling them with the same amount of water and then wrapped one of them with white paper and the other with black paper. The thermometer we had was battery operated so I couldn't use or else it would break. So I put them in the balcony were their was the most sun and left it their for four hours since the sun wasn't shining, but after four hours I went in the balcony and felt the water in each cup the cup with white paper felt cooler than the black one which felt warm.

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As I first looked at the example I immediately started experimenting. I wrapped both of the glass in paper but in different colour one in black and one in white. Then I poured water in both of the glass. I didn't have a thermometer at the moment so I did the experiment by feeling. I set both of the glass in a small window and waited. After some time I felt both of the glasses, and I felt that the glass with the black paper was more heated then the white paper glass.

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i started by getting two glasses and poured water in them . Then i got a black piece of paper and warping it around one of the glasses and then warped the other one with white paper. After letting them in the sun for 5 minutes i went to check to see with one is more hot and i found out that the glass warped in black paper was more hot then the one with white paper glass .

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To do this experiment I went to the cupboard and found one black mug and one white mug. I filled them with water and left them in the sun for 1 hour. Then I put a thermometer in each mug and found that the water in the black mug was a bit warmer than that in the white mug. I search on google about why this happens and found that darker colors absorb more heat than lighter ones.

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I got two glasses and filled them with the same amount of water. I wrapped one glass with a white paper and the other glass with a black paper. Our thermometer is battery operated so I could not use it. I placed the two glasses on a window sill and left them for some hours as today the sun is not shining that much. When I checked the two glasses, the white one was not warm as the black one. The black one was warmer.

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I grab 2 different colours of cushion from our living room sofa,  put them out on a stool in balcony in direct sun , waited for around 2 hours and than I felt that the black cushion was much hotter than the light grey .

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Kaden  lia yr 6.5

Pour  some milk in a bowl than put some drops of food colouring  . You want to use these colours (yellow  and  red and blue and green) . Than get a cotton bath and pour some soup in a bowl use the cotton bath to pour some soup with the cotton  of the cotton bath and put it in the middle .And than pour more soup with the cotton bath and  put the cotton bath were you puted the food colouring. Try it with water

Wich one works?
The milk one works

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Kaden Lia yr 6.5

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I had to wait in the afternoon as it was very cloudy this morning and the rain didn't help to complete this experiment. Finally the sun came out.  At first I wrapped two glasses with papers. One with white paper and the other one with black. I filled them up with water and left them for an hour in the sun. Keep in mind to fill them equally. The temperature of both glasses were the same in the beginning and after an hour the black glass got warmer by 2 degrees.

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Kaden Lia yr 6.5

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I started by grabbing two glasses of the same size and filling them with the same temperature of water and the same amount.First I wrapped one in a kitchen roll and the other in a black sock.Then I grabbed them and put them near the window and noticed that the one in the sock felt a little warmer than the other one.

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First I wrapped a black paper around a glass jar. Then I wrapped a white paper around a similar glass jar. I filled them up with the same amount of water and left them in front of a lighted bulb for a few hours (as today we had no sun). When I went to check on them, I noticed that the water in the glass jar that was wrapped with the black paper was hotter than the water in the jar wrapped in white paper.

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I put two cups one with white paper and the other with back. I left them outside in the sun for 2 hours and i noticed that the black cup was warmer than the white one.

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I grab 2 different colours of cushion from our living room sofa,  put them out on a stool in balcony in direct sun , waited for around 2 hours and than I felt that the black cushion was much hotter than the light grey .

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I took 2 different colours of cushions as did not have black paper, I hung them out on the roof in direct sun and waited for around 2 hours. Than I felt that the black cushion was much hotter than the light grey cushion.

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I left the socks for 3 hrs on the rope,the black socks were warmer than white socks.

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I took two identical plastic cups; one white and covered the second one with black paper. I then filled them up to the same level with water and placed them on the kitchen windowsill. Unfortunately the weather today, was cloudy. If it was bright and sunny, the experiment would have worked better. After 3 hours, I took the temperature of both cups. The water in the white cup was cooler than that in the black cup. This was as expected. Darker colours attract more heat than lighter colours.

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I left the glasses in the sun for 3 hrs and 15 min and then I took the temperature and the black one was hotter then the white one

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For this experiment I used two mugs. One black and one white. From this experiment we can find which mug is a good absorber of heat.
I filled both mugs wth the same amount of water and took the water temperature reading, which was about 13°C. Then placed the two mugs infront of our yard door in the direct sun light. Left them for about 3 hours and took the temperature reading. The black mug temperature reading was found about 22°C , while that of the white mug was about 16°C.
From this I concluded that dark colours are much good absorbers of heat than the others.

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After following the instructions provided, I left both glasses in the balcony for almost 24 hours, since yesterday I forgot to finish my experiment! Ooppss. I noticed that the glass wrapped with the black paper was warmer than the one wrapped with white paper.

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WHITE 60°C

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I hang two tshirts in the sun one black and one white. After 2 hours i went to check the tshirts, the black one was very hot but the white one was cooler.

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First I started by getting two glasses the same size and filled them up with the same amount of water. I wrapped one of the glasses with white paper and the other one with a black paper. I put them both in a sunny spot for 3 and a half hours. When we brought the glasses inside, I felt the water temperatures with my fingers. The water in the white glass was cold whilst the black one was much warmer. The reason that the black one was warmer was because of this: light energy can be converted into heat energy. A black object absorbs all wavelengths of light and converts them into heat, so the object gets warm. A light coloured object reflects the wavelengths  of light so it doesn't get as warm.

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First I filled up 2 glasses with equal amount of water. Than I wrapped a white paper around one of the glasses, using an elastic band to hold it tight and a black paper around the other glass. I left the glasses out in the sun in the back yard for two hours. Afterwards, when I went back to check the temperatures, I found out that the black paper glass was hotter than the white one. The water in the white glass had a temperature of 32.5°c and the water in the black glass had a temperature of 33.6°c. We know that dark surfaces/colours, such as the black paper glass absorb more light and heat than the white paper glass.

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First I made 2 cubes made of paper, one white and one black. I put 2 ice cubes, one in each box. I left them in the sun for at least 15 minutes. I noticed that the ice cube in the black box melted faster than the ice cube in the white box.

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This is how I carried out this experiment:
1. I covered the 2 glasses in black crepe paper and white tissue paper, and filled with the same amount of water.
2. I placed in the sun form 8.00am to 12.00pm.
3. I measured their temperature with a glass thermometer.
4. The results are, the black glass was 24 °C and the white glass was 22°C, and it was not a very sunny day.
So it definitely makes sense why it would be a better idea buying a white car instead of a black one, using a light coloured tent or umbrella for some shade in the sun instead of a dark one, and wearing white clothes in Summer.

Thank You!

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Luca Schembri 6.5

Today Tuesday was a sunny day and i have done my little experiment using light energy (sun) to convert heat energy on an object. First i had to paint a paper in black and wait till it comes dry. Then i wrapped the black paper around a glass of water and a white paper around another filled with the same amount of water. After 3 hours in the sun, the temperature was much warmer then the other this is because the more colour is intense the more absorption of light goes through it. Did you know how much a black car absorbs heat than any other colour?

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The black was the hottest because black attracts the heat.

The white one 36 deg .

The black one 37 deg

Since I didn't have black paper I took two socks one white and one black and I spilled it with some rubber bands

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Kimberley Anne Farrugia 6.2

I did the experiment today because today is sunny and yesterday was cloudy.

I did not have any coloured papers available at home so I used a white plastic disposable glass and another identical glass which I painted black with poster colour.  I took 2 glasses and filled them up with tap water.  I left the 2 glasses outside in the garden for about 2 hours.  The temperature in both glasses at the start of the experiment was at 24 degrees each.  After 2 full hours the black cup was warmer than the other.  The  white cup remained at 24 degrees whilst the black cup was at 26 degrees.

Thank you

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Zack Bugeja 6.1
First I looked at the example. I got two glasses and covered one black and another white with paper. I pourred water in both of them. After letting them in the sun for ten minutes I found that the water in the black glass was hotter then the one in the white glass.

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Alanah Ghio yr 6.6
I got two of the same cups and filled each one of them with water.Then I wrapped black and white paper around the cups.I let them sit in the sun for 3 hours.I didn't have a thermometer so I tested them with my finger.The black one was hotter.

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I took two plastic cups and fill them with water with the same amount. Then I covered one with a plastic black bag and the other one with white paper. I left them for two hours on the roof. I didn't have a thermometer so I used my finger. The one  with the black plastic bag  was warmer than the one with the white  paper.

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Lys Galdes yr 6.5

I did not had any black paper so I had put  a sock around the glasses and left them out in the sun. After 1 hour I checked the temperature,the  glass with black sock had 1degrees more than the one with white sock.