Today Mrs Douglas did a science experiment with the class to find out which material would work best to black out our windows during an air raid in World War 2.
We had 4 materials to choose from. We made a hypothesis, writing down which materials would be most effective or which materials would be least effective.
Then we attached the materials to the windows and went outside to test them. From inside the classroom , Mrs Henderson shone a torch behind each material and we had to see if any light could be seen on the other side of the window.
The red cellophane was the least effective and we were surprised to find that the light was blocked by the white paper!