Chapter 3: Air

Which of the following compositions of air is correct?

• A

• B

• C

• D

What is needed to start a combustion?

• Oxygen and heat

• Oxygen, heat and fuel

• Heat and fuel

• Fuel and oxygen

Is the air pressure the same at all heights?

• Yes, because the air is distributed evenly along the atmosphere

• No, because there's less air at higher altitudes

• Yes, because the atmosphere pushes the air back

• No, because there are areas of low and high pressure points due to the weather

Which of the following displacements of air due is correct?

• A

• B

• C

What direction is the wind coming from?

• East

• West

• South

• North

How do clouds form?

• Water vapour condenses due to warm air, then rises up due to cold air

• Air ascends due to cold air, then the vapour condensates due to warm air

• Air ascends due to warm air, then the vapour condensates due to cold air

• Water vapour condenses due to cold air, then rises up due to warm air

In this example, the air in a bottle is heated by 10 degrees Celsius. During this process, 10 grams of water vapour is lost. Will condensation still occur?

• Yes, because the temperature is too high

• No, because the temperature is too high

• No, because the amount of water vapour is too low

• No, because both the amount of vapour and temperature do not meet the requirements

What are these items called (from left to right)?

• Anomameter, pressuremeter, hydrometer

• Anemometer, hydrometer, pressuremeter

• Anemometer, hygrometer, barometer

• Beaufortmeter, atmometer , barometer

What does this measure?

• The amount of water present with respect to the maximum

• The amount of water vapour present

• The amount of mass of air present

• The amount of air present with respect to the maximum

How confident are you of your answers?

• I think I did excellent!

• I think it went pretty well!

• I'm not too sure about some answers...

• I just guessed ¯\_(ツ)_/¯