Heat, Pressure and Wind

Heat, Pressure and Wind

By Restie Carullo

High Pressure​

=cold air​, denser

Low Pressure​

=warm air​, less dense​

​Air moving horizontally is called WIND. Air moves due to differences in air pressure.

Air Pressure is affected by temperature.​

Multiple Choice

Why do warm air rise and cold air sink?

• Warm air is less dense than cold air.

• Warm air has less mass

  than cold air.

• Warm air exerts less pressure than cold air.

• The average kinetic energy of the molecules in warm air is less.

Wind moves from HP to LP.

​Local Winds: Sea Breeze

​Winds are named after where they come from.

Multiple Choice

Land Breeze and Sea Breeze are local winds.

• True

• False

Wind moves from HP to LP.

​Local Winds: Land Breeze

​Winds are named after where they come from.

Multiple Choice

The movement of air during daytime differs from its movement during nighttime.

• True

• False

​Sun=Day Time

LaNd Breeze vs. Sea​ Breeze

​Nighttime

​Global Wind System

Global Wind Pattern

​Principles:

1. Air moves from High Pressure to Low Pressure

2. Alternating High Pressure and Low Pressure due to uneven heating of the sun

3. Due to Earth's rotation wind does not move in straight line, but curves to the right in the Northern Hemisphere and curves to the left in the Southern Hemisphere​

Multiple Choice

Which of the following is NOT a global wind?

• Trade Winds

• Westerlies

• Easterlies

• Sea Breeze

Global Wind Pattern

​Let's Practice!

Principles:

1. Air moves from High Pressure to Low Pressure

2. Alternating High Pressure and Low Pressure due to uneven heating of the sun

3. Due to Earth's rotation wind does not move in straight line, but curves to the right in the Northern Hemisphere and curves to the left in the Southern Hemisphere​