What are the procedures of making a bottled rocket?

To make a bottle rocket, you'll need a plastic bottle, water, and a cork or stopper that fits snugly in the bottle's opening. Fill the bottle about one-third full with water, then insert the cork, ensuring it's tightly sealed. Using a bicycle pump or air compressor, pump air into the bottle through the cork until the pressure builds enough to force the cork out, launching the rocket. Always perform this experiment outdoors and take safety precautions, such as wearing safety goggles.