Unit 1_How Things Burn_Group A

Which of these can make things burn ... nitrogen, oxygen or carbon dioxide?

• All do have the ability to make things burn.

• Oxygen supports burning. Nitrogen and carbon dioxide do not support burning

• Oxygen and carbon dioxide support burning but nitrogen can’t.

What is the fire burning condition?

Choose the wrong one ...

• Have oxygen

• Have a burning thing

• Air can not go in

What is the first step to collect oxygen in a jar?

• Blow into the jar and then put it in water.

• Put the jar in water and remove oxygen from the can.

• Put a can of oxygen in a jar.

What is N₂?

• Nitto

• Oxygen

• Carbon dioxide

• Nitrogen

What is this?

• gas sampler

• Gas detector tube

• Carbon dioxide detector tube

What is O_2?

• Nitrogen

• Oxygen

• Carbon dioxide

What will happen after this?

• No change

• The light goes on and off

• Eventually went out

What is the chemical symbol for carbon dioxide?

• C₂

• CO₃

• CO₂

• COI

Do you open the top or bottom of the candle jar to keep the fire burning?

• open the top of the jar

• open the bottom of the jar

• do nothing

What ％ carbon dioxide is in air before burning?

• 0.004％

• 0.03％

• 1%