Air stability - condensation and precipitation

What happens to temperature with increasing altitude through the troposphere?

• It increases

• It decreases

• It remains constant

Why is Earth's surface warmer than the atmosphere?

• Molecules are more tightly packed in the solids and liquids near and on the surface

• Molecules are more tightly packed in the gases of the atmosphere

What happens to atmospheric pressure as altitude increases?

• It increases

• It decreases

• It remains constant

What happens to parcels of air as they rise through the troposphere?

• Increase in volume and decrease in temperature

• Increase in volume and increase in temperature

• Decrease in volume and increase in temperature

• Decrease in volume and decrease in temperature

What is the dry adiabatic lapse rate (DALR)?

• Rate at which a parcel of dry air (less than 100% humidity) warms as it rises

• Rate at which a parcel of dry air (less than 100% humidity) cools as it rises

What is the value of the DALR?

• 10C increase for every 1000m above sea level

• 10C decrease for every 1000m above sea level

• 7C increase for every 1000m above sea level

• 7C decrease for every 1000m above sea level

What is the saturated adiabatic lapse rate (SALR)?

• Rate at which a parcel of dry air (less than 100% humidity) warms as it rises

• Rate at which a parcel of dry air (less than 100% humidity) cools as it rises

• Rate at which a parcel of saturated (wet) air (100% humidity) cools as it rises

• Rate at which a parcel of saturated (wet) air (100% humidity) warms as it rises

As air rises, it cools and...

• contracts

• expands

• remains the same

What is the value of the SALR?

• 10C increase for every 1000m above sea level

• 10C decrease for every 1000m above the dew point

• 7C decrease for every 1000m above sea level

• 7C decrease for every 1000m above the dew point

Why does condensation occur?

• The air temperature increases and water vapour molecules clump together as energy has decreased

• The air temperature decreases and water vapour molecules clump together as energy has decreased