A scuba diver with an air tank sits on the edge of a boat ready to enter the ocean
A diagram of an experimental setup with two gases collecting in separate tubes of a piece of glassware containing water with sulfuric acid. Inside the tubes are an anode and cathode connected outside the tube by a wire and battery
Gas - diagrams-web-01
A line graph showing a solid line rising from zero degrees up then a dotted line tracing back from 0 degree C to 0 volume at absolute zero temperature