Wind

Wind

Multiple Choice

The world likes most things in nature to be

• equal and balanced

• full of as much particles as possible

• as cold as possible

Multiple Choice

If the world is not equal,

• the world will hope humans can fix it

• the world will try to fix it to make it equal

Each green dot represents an air particle. Think: Is there equilibrium in this example?

Multiple Choice

Is there EQUILIBRIUM in this example?

• Yes, the two boxes are equal

• No, the two boxes are not equal

Open Ended

What could nature do to make these equal?

Air pressure is the weight of air pushing on Earth

Think: Which of these will weigh more: cold air or hot air?

Multiple Choice

Cold air has

• lower air pressure

• higher air pressure

How is wind created

--is there equilibrium?

--how might the world fix this?

Multiple Choice

Why did the air move

• the air pressure was not in equilibrium

• the temperature was in equilibrium

Multiple Choice

Which has lower air pressure? the hot air or the cold air?

• hot air

• cold air

Multiple Choice

How did nature try to solve the problem that the air pressures were different?

• It heated up the air that was over the ice to make the particles spread out

• it moved air particles from the location of high pressure to the location of low pressure

Multiple Choice

The earth is not heated evenly. This means the air above the earth is not heated evenly. This uneven heating causes a difference in

• elevation

• river speed

• chemical composition

• air pressure

Multiple Choice

Therefore, local winds is caused by the

• Revolution of the Earth around the sun

• The distance of the sun from the Earth

• the uneven heating of the Earth

Multiple Choice

On a map, High pressure is represented by

• H

• H

Multiple Choice

On a map, Low pressure is represented by a

• L

• L