what does ' bubble gas through the water' mean in this context?
I was wondering if someone could take a look for me, what does " bubble gas through the water" mean in this context?
Thanks for your help.
Professor ... So, if you just stick rye plants in water, it doesn't make a difference how much fertilizer you add, ( you also need to bubble gas through the water, ) so they have access to that oxyen. If they don't have that, they're in big trouble. Ok, so this guy - this scientist - grew a rye plant in water so he could see the root system how big it got - its surface area. ...