G6 U1 Air and How Things Burn

Which jar supports burning?

• 
• 
• None of the above

• Both jars support burning

Why do we have to use an incense stick in this picture?

• To know the amount of air

• To know the amount of smoke

• To know the direction of the airflow

• To know where hot air on top of the candle goes

Describe the direction of airflow in this picture.

• Air flows IN to the TOP and flows OUT from the BOTTOM

• Air flows IN to the BOTTOM and flows OUT from the TOP

• The air moves around the candle inside the jar

• The air does not flow in this picture

What are the TWO things that support burning?

• Clean air and space

• Clean air and airflow

• Good airflow and Oxygen

• Good airflow and Carbon dioxide

Which of the following jar shows what happens to a jar filled with only OXYGEN?

• A

• B

• C

• Both A and C

Which of the following is TRUE about Oxygen?

• Oxygen supports burning.

• Oxygen is about 78% of the air.

• Oxygen, Nitrogen, and Carbon dioxide support burning.

• All of the above

Study the graph. Which shows the correct volume (%) of Oxygen, Nitrogen, and Carbon Dioxide?

• A=Oxygen; B=Nitrogen; C=Carbon dioxide

• A=Nitrogen; B=Oxygen; C=Carbon dioxide

• A=Carbon dioxide; B=Oxygen; B=Nitrogen

• A=Carbon dioxide; B=Nitrogen; B=Oxygen

Limewater can detect (find out) the increased volume (%) of?

• Nitrogen

• Oxygen

• Carbon dioxide

• other gases

What happens to the limewater after mixing it with the air (after burning)?

• The volume decreases

• The taste becomes more bitter

• The color changes to milky white/cloudy

• The limewater stays clear like pure water

Which correctly shows the limewater before burning?

• 
•