Chemical Change

What type of change is discussed in this video?

• Physical Change

• Biological Change

• Chemical Change

• State Change

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What is produced when bicarbonate soda is added to vinegar?

• Water vapor

• Oxygen gas

• Carbon dioxide

• Hydrogen gas

What visual evidence indicates a chemical change is occurring in the beaker?

• A change in color

• The formation of a solid precipitate

• Bubbling and foaming

• A significant temperature increase

Why does the gas produced from the reaction extinguish the candle flames?

• It cools the flames down.

• It removes the fuel source.

• It displaces the oxygen needed for combustion.

• It increases the air pressure around the flames.