The teacher switches on the light so the class can see the whiteboard better. The teacher shows the class a video on her computer. Draw an energy chain to show the energy change when he does this

At break Vikal eats a banana. He then plays football with his friends until he hears the bell ring at the end of break. Draw an energy chain to show the energy change when he does this

Vikal’s classroom is cold and dark in winter. Before Vikal starts writing in his workbook, he rubs his hands together. Draw an energy chain to show the energy change when he does this