Why doesn't this hiker get cold?

Study the picture. Explain why it is a good idea to stand close to each other in winter?

Explain the situation shown in the picture, in which soot-stained snow melts faster than clean snow.

Give examples of your daily experiences with heat radiation.

Why is it hottest on a clear summer day not at noon, but somewhat later?

The electric room heater consists of an incandescent coil and a well-polished concave metal surface. What could be the function of this metal surface?

The picture shows tern chicks (smaller) and albatross chick (large). Based on this picture, would you say that the weather is hot or cold at the moment?