Life on the Earth could develop thanks to the generation of the stratospheric ozone layer. Without it there would be no protection against radiation, the temperature would fall and the Earth would be uninhabitable.

This is one of the main drawbacks we’ll find in Mars. A challenge we’ll have to meet if we want to colonize it. May building underground cities be a solution?

The activity is a four-step one:

Session 1 (1h-1h30min). Driven by a STEM teacher in the class

1. searching about ozone (what is it, how is it formed?, differences between tropospheric and stratospheric ozone…)

Session 2 (1h and subsequent observations ). Driven by the Science teacher in the lab

1. build an experiment to test the effect of UVA-rays on living beings (long-term observation)

Session 3 (1h). Driven by the Science teacher in the lab

2. Results, conclusions and reflection

Session 4(1h-1h 30min) Driven by a STEM teacher in class

1. discussing and designing solutions to that problem in future Human settlements in the outer space