Mostrando el intervalo de resultados
12
11 - 12
Tie a pencil to a thread and use it to measure the power of wind in different rooms and in different times of the day. Take notes. On which side of the house would you put a windmill? Is there more w ...
Does recycled paper break down faster than new paper? Dig a hole about two inches deep and large enough to lay the pieces of paper side by side. Place the pieces in the hole and bury them with the sam ...