Heating as a transfer of energy: RadiationAdministrator2020-10-06T12:48:28+02:00
Show the learners an X-ray and ask them the following questions:
What am I keeping in my hand?
Call one learner to the front; let him/her look closer and explain to the rest of the class what they can see/ identify.
Find out who had been to a radiologist (let the learner elaborate / if no one can, then you, as the teacher, must tell the learners).
Teacher Input 5
Ask the learners what do cars, rocks, oceans, horses, the atmosphere and trees have in common with them (the learners). (Possible answers: each one is a source of radiation most of this radiation is invisible).
Explain to the learners that every surface on earth absorbs and reflects energy at different degrees, depending on its texture as well as its colour.