Air MovementsHow are air movements created?

How do air movements affect weather?

Earth’s Atmosphere

Earth’s AtmosphereThe atmosphere is a

layer of gases surrounding the Earth

It protects life on Earth

The sun is where air movement begins

Why does movement of air begin with the sun?

Turn and Talk

Uneven Heating

Air Molecules being heatedAir molecules expand and move upwards

Air Molecules ContractWhen air gets cold it contracts and moves

downward

Convection CurrentThis movement is called Convection

Current

Convection CurrentConvection Currents are seen

throughout nature:

Convection CurrentIn Water --------------

Convection CurrentUnder the Surface of the Earth-----------

And

In Air

___________________

What is this air movement called? Write your answer below.

Convection Current in Action

A Local Wind

What do you think gets hotter faster: Earth’s

land or Earth’s water?

(Turn and Talk with a partner)

During the Day:

Land heats up faster than water so the air rises above the land

and comes back from the ocean.

Local Wind

Water is funny. It retains heat better! So that means once it gets warm, it stays warm longer than land.

So at night…

But…

Air gets warm over

water!Air then

moves in the opposite direction near the

ocean

Global Convection Currents

Uneven heating of Earth causes local and global air movements.

Here are global convection currents we have on Earth.

These global wind patterns move weather

across the world.

Air Movement Flow MapMake a thinking flow map of a local wind.

Explain in writing what is happening in picture.

Explain in writing what is happening in picture.

Explain in writing what is happening in picture.

Picture Picture Picture