Climate and How They Change

By Mr. V. Calzada And Mrs. Swanson

Vocabulary Quiz1. Almost all weather occurs in the lowest layer of air, or

____________________, that surrounds Earth. The atmosphere stretches about 1000 km (620 mi) from the Earth’s surface to outer space.

2. As air warms, its weight, or ___________________, lessens. ___________________is the force that the particles of air exert on a surface such as the ground.

3. _________________is the amount of water vapor in the air.4. ______________refers to the conditions that exist in the atmosphere over

a short period, ranging from just one day to perhaps a week.5. In contrast, _______________refers to the average weather conditions in

an area over a long period, spanning at least a month and usually longer.6. A _______________is a boundary between two air masses (cold and warm

air).7. _______________is an amount over a period of time.

Review: What type of weather is associated with high and low air pressure?

Cold air sinks! Warm

humid air rises!

Review: Analyze and Interpret the Weather Map 1. In what direction is the

warm front moving?2. In what direction is the

cold front moving?3. What is the high and low

temperature in Houston, Texas?

4. How is the weather going to change in Minneapolis during the next couple of water?

5. Is there an area of low or high pressure near New York city? How do you know?

Review: What forms between warm and cold fronts when they collide?

Water vapor will condense and create storms or precipitation.

What is climate?• Repeated weather conditions.• Same temperature• Same wind speed and directions• Same precipitation amounts• Etc.

• Same type of weather year after year or longer.• Usually expressed as an average.• Usually are expressed over latitudes.

What affects the world’s climates?• Prevailing Winds• Ocean currents• Shape of the land• Uneven hitting of the Earth• Humans

World Climates

Climate Zones

Humans Affect Climate: Global Warming

Consequences of Global Warming

Answer to Global Warming?

Burn Less Fossil Fuels

Use Alternative Sources of Energy!