Blowin' in the Wind

Blowin' in the Wind

Lesson 4.4

breeze:

a light and pleasant wind

There's more pressure and temperature in the atmosphere closer to Earth

• pressure: the weight of the air in the Earth's atmosphere

• temperature: degree of hotness or coldness as measured on a scale

Air moves

from areas of high pressure to areas of low pressure

Multiple Choice

Areas under higher pressure always ...

• move toward areas with lower pressure.

• have high pressure.

Multiple Choice

Which is under more pressure and has higher temperature?

(high temperature = hot

low temperature = cold)

• air near Earth's surface

• air higher up in the atmosphere

Multiple Choice

Why is air constantly moving?

• Because if air stops moving we wouldn't be able to breathe.

• Because the surface of Earth is never heated evenly.

Multiple Choice

Where does the air over the ocean move towards?

• Higher up in the atmosphere

• Toward land in order to fill the space left vacant by the rising air.

Multiple Choice

Which of the following is NOT a cause of wind?

• changes in temperature

• changes in pressure

• the moon's orbit

• Earth's rotation

Multiple Choice

Why is it always windy at the beach?

• The temperature on land is different from the temperature at sea.

• The air pressure on land is different from the pressure at sea.

• More of the sun's heat is absorbed by land than by water.

• All of the reasons mentioned.

Multiple Choice

Warm air near Earth's surface usually ...

• rises into Earth's upper atmosphere.

• cools down when a good breeze blows by.

• follows cooler air out to sea.

• doesn't move.

Multiple Choice

Land doesn't hold heat as well as water does. Once the sun sets, the ocean still has heat to give off, but the land does not. This means the ocean air is warmer at night than the air over land. Which way does the breeze blow?

• from the land to the ocean

• from the ocean to the land

• from the land to higher up to the atmosphere

• from the ocean to higher up in the atmosphere

Multiple Choice

Why a does high-pressure system usually mean nice weather?

• Because the pressure keeps the hot air in the same place.

• Air is moving away from the high pressure, so the weather is windy and cool.

Multiple Choice

Because Earth is a sphere, the equator gets more of the sun's warmth than the poles. Which direction do air currents usually flow?

• from the poles to the equator

• from the equator to the poles

• around the equator