Weather, Pressure, air masses and wind

What does air temperature measure?

• The weight of air molecules

• The speed of air molecules

• The density of air molecules

• The amount of sunlight reaching the Earth

What happens to air molecules when the temperature increases?

• They move slower and collide less

• They move faster and collide more

• They stop moving

• They become heavier

What happens to air pressure when the temperature increases?

• Air pressure decreases

• Air pressure stays the same

• Air pressure increases

• Air pressure becomes unstable

Why does a balloon or tire get tighter as the air warms up?

• The air molecules move slower and compress

• The air molecules move faster and push harder

• The air molecules stop moving

• The air molecules escape the balloon

What happens to air pressure when the temperature decreases?

• Air pressure increases

• Air pressure decreases

• Air pressure stays the same

• Air pressure fluctuates

What happens when air cools as it rises?

• It creates a high-pressure system

• It creates a low-pressure system

• It creates no pressure change

• It causes the air to sink

What is a characteristic of high-pressure systems?

• Air warms up and rises

• Air cools and sinks

• Air is dense and rises

• Air stays the same temperature

What causes wind to move?

• Air moving from high-pressure areas to low-pressure areas

• The Coriolis effect only

• Temperature differences on the Earth's surface

• Air moving from low-pressure areas to high-pressure areas

Why does wind move from high-pressure to low-pressure areas?

• To balance the temperature differences

• To balance the pressure differences

• To reduce the Coriolis effect

• To create storms

Which factor causes wind to deflect in different directions?

• The Sun's heat

• The Earth's rotation (Coriolis effect)

• Mountain ranges

• Ocean currents