Air Temperature

Air Temperature

Middle School

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Learning Objectives

• Explain the relationship between energy and temperature.

• Describe how latitude, ocean currents, and winds influence a region's climate.

• Analyze how energy is transferred between the sun, Earth, and the atmosphere.

• Use a model to explain how the ocean and atmosphere create weather.

Key Vocabulary

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Climate

The long-term average weather conditions in a particular location over a very long period of time.

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Temperature

A measure of the average energy of motion of the particles of a substance.

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Energy

The ability to do work or cause change; most of Earth's energy comes from the sun.

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Energy Transfer

The movement of energy from a warmer object to a cooler object until they are equal.

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Latitude

The measurement of distance north or south of the Equator, affecting how much solar energy is received.

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Ocean Current

A continuous, directed movement of sea water generated by various forces like wind and temperature differences.

Key Vocabulary

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Prevailing Winds

Global winds that blow constantly from the same direction and over a particular area.

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Atmosphere

The layer of gases surrounding Earth that helps regulate global temperatures and climate conditions.

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What Are Temperature and Energy?

• Temperature measures the amount of energy present in a substance like air.

• The more energy the air contains, the higher its temperature will be.

• Nearly all of the energy found on our planet comes from the sun.

• Energy always moves from a hotter region to a much colder one.

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Multiple Choice

What does temperature measure?

• The amount of energy present in a substance

• The total energy that comes from the sun

• The way energy moves from one place to another

• The speed at which a substance gets colder

Multiple Choice

Why is the temperature of the air higher when there is more energy?

• The air contains more energy from the sun.

• The sun makes the air less dense.

• The air has less room to expand.

• The sun absorbs the cold from the air.

Multiple Choice

On a cool evening, the ground is still warm from the sun. What will happen to the energy in this situation?

• Energy will move from the warm ground to the cooler air.

• Energy will move from the cooler air to the warm ground.

• The temperature of the ground will increase.

• No energy will be exchanged between the air and the ground.

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How Energy is Transferred to the Air

• The atmosphere is not directly heated by the sun; it happens in steps.

• First, the sun's energy warms Earth's surface, including the land and water.

• The warmed surface of the Earth then heats the layer of air above.

• Energy naturally moves from the warmer ground to the cooler air above it.

Multiple Choice

What is the primary way that the air in the atmosphere gets its heat?

• Energy is transferred from the warm surface of the Earth.

• The sun's rays heat the air directly.

• Energy is transferred from clouds in the atmosphere.

• The movement of the wind creates heat in the air.

Multiple Choice

Which statement best describes the sequence of how energy is transferred to the air?

• The sun heats the land and water, which then heats the air.

• The sun heats the air, which then heats the land and water.

• The air heats the land and water, which then heats the sun.

• The clouds heat the sun, which then heats the air.

Multiple Choice

On a cool morning, the sun shines and warms the ground. What is the most likely outcome for the air just above the ground?

• The ground will transfer heat to the cooler air, causing the air temperature to rise.

• The cool air will transfer its coldness to the ground, causing the ground to cool down.

• The ground will absorb energy from the air, causing the air temperature to drop.

• The temperature of the air will remain the same regardless of the ground temperature.

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The Role of Latitude

• Because Earth is a sphere, its surface is heated unevenly by the sun.

• ​Locations near the equator get direct sunlight, leading to higher temperatures.

• Places near the poles get less direct sunlight, resulting in lower temperatures.

• A location’s temperature is affected by its distance from the equator.

Multiple Choice

What is the main reason for the difference in average air temperatures between locations near the equator and locations near the poles?

• The way sunlight strikes each location.

• The number of clouds over each location.

• The distance of each location from the ocean.

• The number of mountains at each location.

Multiple Choice

Why might two cities at the same latitude have different temperatures?

• Latitude only

• Elevation, currents, nearby water

• One is closer to the Sun

• Random weather

Multiple Choice

If a city near the equator had sunlight at a lower angle for several months, what would likely happen to its temperature?

• Increase

• Decrease

• Stay the same

• Fluctuate

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The Ocean's Influence on Climate

• The ocean plays a big role in controlling both our weather and climate.

• It absorbs lots of solar energy and releases the heat very slowly over time.

• Ocean currents move this warm water from the equator toward the poles.

• This process helps make coastal areas milder than areas farther from the water.

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Multiple Choice

What is the primary way the ocean influences Earth's climate?

• By creating large waves that cool the land

• By reflecting all of the sun's energy back into space

• By absorbing and slowly releasing heat from the sun

• By providing a home for fish and other marine life

Multiple Choice

How do ocean currents contribute to the regulation of climate?

• They move warm water from the equator to the poles.

• They make the water at the equator even hotter.

• They create wind patterns that cool the entire planet.

• They push cold water from the poles to the equator.

Multiple Choice

If a coastal area and an inland area are at the same latitude, what is the most likely difference in their climates?

• The coastal area would have a milder climate.

• The inland area would have a milder climate.

• Both areas would have the exact same climate.

• The coastal area would have more extreme temperature changes.

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Atmospheric Circulation and Prevailing Winds

• Atmospheric circulation is the large-scale movement of air that distributes heat.

• This is driven by the sun's unequal heating of the Earth.

• Earth’s rotation makes this moving air curve, creating predictable prevailing winds.

• Landforms like mountains can also block or change wind patterns.

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Multiple Choice

What is atmospheric circulation?

• The large-scale movement of air that distributes heat.

• The rotation of the Earth on its axis.

• The blocking of wind by large landforms.

• The curving of air caused by Earth's rotation.

Multiple Choice

What is the relationship between the sun, Earth's rotation, and prevailing winds?

• The sun's unequal heating of the Earth causes air to move, and the Earth's rotation causes it to curve.

• Mountains block the sun's heat, which causes the air to stop moving and rotating.

• The sun's heat and the Earth's rotation combine to stop the movement of air.

• The Earth's rotation heats the atmosphere, and the sun's energy makes the resulting wind straight.

Multiple Choice

Imagine a continent with predictable prevailing winds. If a new, large mountain range were to form across the middle of the continent, what would be the most likely outcome?

• The wind patterns would be blocked or altered by the mountains.

• The mountains would cause the Earth to be heated more evenly.

• The mountains would stop the Earth from rotating.

• The wind patterns would become stronger and more predictable.

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Common Misconceptions

Misconception	Correction
The atmosphere gets its heat directly from the sun.	The sun warms the ground, and the ground then warms the atmosphere.
All places at the same latitude have the same climate.	Ocean currents and winds also create different climates at the same latitude.
Oceans only affect the climate of nearby coastlines.	Ocean currents transport heat globally, influencing climate far inland.

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Summary

• Temperature is a measure of energy, and most of Earth's energy comes from the sun.

• The sun heats the surface, and in turn, the surface heats the air.

• A location's latitude determines the amount of direct solar energy it gets.

• Ocean currents and winds distribute the sun's energy across the planet.

Poll

On a scale of 1-4, how confident are you about explaining what determines a location's climate?

• 1 (Not confident at all)

• 2 (A little confident)

• 3 (Mostly confident)

• 4 (Very confident)