Which is heavier, the air or the water? The teacher shows balloons. The pupils play with them. then the teacher asks, Is there anything inside? *The first answer is yes
The first answer is yes
But the teacher shows one ballon that is not inflated and one that is inflated then she asks:
Are they the same?
What must we do if we want to play with this balloon?
The pupils realice that we need to blow and when we blow we put air inside.
We compare a balloon with air and a balloon with water
Which is heavier?
The children can guess the answer and finally let’s play again with a friend. /View a ppt. /
