Set 2 answers

1. You should wear mittens as it is able to trap heat within the fingers and reduce surface area.
2. Fur next to the skin.
3. Absorb light wave better so that we can see things.
4. Ice is not a full solid. Ice upon freezing gives up heat to plants, thus, people can still grow vegetables during winter.
5. More blood directed to your face, so that your face can dissipate heat.
6. The tile file conducts heat better.
   

Set 1 answers

1. The road is black and rough, while the cement is grey and smooth. Dull black surface absorb heat faster than bright shiny surface. Thus, the snow on the road melt sooner than on the cement.
2. The material with higher emissivities glows the brightest.
3. If the fireplace pokers are made of copper, we cannot hold on to it, because it is too hot. Copper conducts heat faster than iron.
4. One would find it in cold climates. Air is a poor conductor of heat, thus the air-filled tubes are able to trap heat better, especially useful in cold climates.
5. Snow insulates the ground and traps the heat within the ground , so that the water pipes would not freeze.
   

Set 2

1. To keep your hands as warm as possible during skiing, should you wear mittens or gloves?(Mittens, except for the thumb, do not have individual finger compartments.)
   
2. Could one keep warmer in winter wearing a fur coat inside-out, with the fur next to the skin?
3. Why is the pupil of the eye black?
4. Why ice has low thermal conductivity?
5. Why do people people become "flushed" when overheated?
6. When one steps from a shower on a cold morning, why does the tile floor seem so much colder than air?
   

Set 1

1. The Sun goes down, snow falls on cement playground and on asphalt road. Why does the snow on the road melt sooner than on cement?
2. Two different materials at the same temperature have different emissivities. Which one glows the brightest?
3. Why are fireplace pokers made of iron and not copper?
4. Some animals have hair which is composed of solid tubular strands, while others have hollow, air-filled tubes. Where would one more likely find the animal with hollow air-filled tubes? In cold climates, or warm?
5. In Alaska, a lack of snow allowed the ground to freeze down to a depth of about one meter, causing buried water pipes to freeze and burst. Why did a lack of snow lead to this situation?