Task 6

Materials and tools for a working group:

(eventually each group will prepare 1–2 jars to compare with each other): 5 identical jars with lid, 5 thermometers, plasticine, stop watches, colored paper (except white and black colors – the same kind), glue

Procedure:

In the following task, the pupils will examine the effect of different colors on the temperature in the jars. The color of the jars can be any except white and black.

The individual colors and their effect on the temperature in the jars will be recorded and compared. According to the colors chosen, the pupils color the jars in the worksheet, which they then arrange from the ones that they think will heat the most (label 5) to the least (1). After predictions have been made, the teacher discusses them. It notes whether the pupils also refer to the findings of the previous task.

After the discussion, they prepare jars that are wrapped with colored paper according to the color of their choice. Here again, the teacher reminds the pupils to use the same glasses (material, shape) and the same type of colored paper (they differ only in color). He should also warn them to use only one sheet of paper, not more. They place a plasticine cap on top of which they place a thermometer. They put the cups in the same place – preferably where the sunlight falls directly. They then verify their predictions.

Pupils should record the temperature at a certain time interval (eg every minute) until the temperature has stabilized. Each pupil in the group can record the temperature change of one jar. They write down their findings and compare them with predictions. At the end they organize colors from „warmest to coolest“, i. from those that absorb most energy to those that most reflect energy from solar radiation.