Oxygen comes from plants. Like us plants need food to give them energy. The plants use sunlight, water. and air to make a sugar. They use this sugar to give them energy to help them grow. This is called photosynthesis. Once they have finished making their food there is some oxygen left over. They release this oxygen so we can breathe it in. This little activity will let you see the oxygen that is released from the leaf.
We cut a healthy leaf from a plant and placed it in a glass of water and placed it in a sunny spot.
After a hour we could see lots of little oxygen bubbles all over the leaf and the glass
We observed our leaf every few hours by the end of the day there was a lot of bubbles around the edge of the glass. We gave it a little shake and watched them float around.
Check out my blog on Joseph Priestley to find out more activities on oxygen and air.