E7D89DD6-8262-426C-9B88-BDC50C766DEF-1rslkar

For this video above, we are testing for hydrogen gas. I know that it was hydrogen gas because when we did the flame test, it made a “pop” sound. It made a “pop” sound because when a flame makes contact with hydrogen and oxygen mixed together, an explosion happens. The explosion isn’t harmful because there’s only a very small amount of hydrogen in the test tube. Knowing this can be useful in everyday life because when we use a large amount of hydrogen for something, we know to make sure there are not fire hazards nearby.

B4DABADC-F38C-4ABC-875E-DC20BA428E74-28f7avl

For this video above, we are testing for carbon dioxide. I know that it was carbon dioxide because when we put the flame inside the tube, the flame went out. Fire needs oxygen to burn and carbon dioxide blocks out the oxygen so the fire stops going. Knowing this can be useful in everyday life because when there is a fire, you know you can stop it with carbon dioxide, or use a fire extinguisher (which has pressurized nitrogen and carbon dioxide).

4DED1A3A-60EF-44A9-A029-64058E7B5D5E-21hcyjk

(The fire was supposed to glow brighter, but we made some mistakes)

For this video above, we are testing for oxygen gas. I know that it was oxygen gas because when we put the flame inside the tube, the fire started to get stronger. The fire got stronger because fire uses oxygen to burn and there was more oxygen in the tube so it got stronger. Knowing this can be useful in everyday life because if you ever need to make a fire, you know not to block out the oxygen in any way.