How did we make them?
1. First we were given boxes and we cut a flap out of the lid.
2. Then, we covered the flap with aluminium foil.
3. After that, we used clear plastic wrap to create an airtight window for sunlight to enter into the box.
4. Next, we lined the bottom of the box with black construction paper.
5. Finally, we put the food inside to cook and we placed our solar ovens outside facing the direction on the sun.
How did they work?
The heat from the sun became trapped inside our solar ovens, and it started getting very hot. Ovens like the ones we made are called collector boxes, because they collect the sunlight inside.
Rays of light are coming to the earth at an angle. The foil reflects the ray, and bounces it directly into the opening of the box. Once it has gone through the plastic wrap, it heats up the air that is trapped inside. The black paper absorbs the heat at the bottom of the oven.
Next time there's an electricity cut, you'll know exactly what to do!