Task 1

For the first task, the teacher prepares several sheets of black and white paper for pupils, which either lays side-by-side on the Sun-lit area or illuminates them closely by a lamp with a classic or halogen bulb. At the same time, pupils will put their palms on black and white paper and compare the warming of the paper, i.e. the amount of heat energy received or emitted, when the lamp is turned off or shaded from the Sun. The teacher then explains the principle of energy intake and its radiation back in the form of long-wave radiation (infrared), which we perceive as heat. It is a model of uneven heating of the Earth surface depending on the darkness. The different amount of heat emitted heats up the air above the surface and leads to its flow. Pupils should understand that different surfaces receive (and emit) different amounts of energy.