Kia Ora, for this activity you had to make a submarine using pen and paper, Google Drawings, or online coloring. I decided to make my submarine on Google Drawings, I used polylines and mostly curved lines and circles, finishing up with some colors and a background.
How do submarines go deeper? and How it gets back up to the surface of the water?. The submarine goes deeper because, the ballast tanks fill up with water, so the submarine is heavier than it looks. It gets back up to the surface by closing the ballast tank so there is no water inside and that is how they get back up.
