Impact on the Atmosphere

Impact on the Atmosphere

Middle School

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Learning Objectives

• Explain how human population and resource use affect the atmosphere.

• Define air pollution and identify its main types like smog and acid rain.

• Describe the cause-and-effect relationships that result in specific environmental impacts.

• Identify how technology, treaties, and our actions can help reduce air pollution.

Key Vocabulary

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Air Pollution

This is the contamination of the Earth's atmosphere by harmful substances, gases, and particles.

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Per-Capita Consumption

This is the average amount of a specific resource that a single person consumes.

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Natural Resource

These are valuable materials that are found in nature and are used to support life.

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Photochemical Smog

A type of air pollution that forms when sunlight reacts with certain chemical pollutants.

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CFCs

Chlorofluorocarbons are chemicals that break down the Earth's protective ozone layer, which shields us.

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Particulate Matter

An inhalable and complex mixture that is made up of extremely small solid and liquid particles.

Key Vocabulary

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Acid Precipitation

Acid precipitation is rain or snow that has a much lower pH level than normal precipitation.

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Ozone Layer

The ozone layer is a special layer high up in our atmosphere that absorbs harmful UV rays.

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Engineered Solution

An engineered solution is a special type of technology that has been carefully designed to solve a problem.

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What is Air Pollution?

• Air pollution is when harmful substances like gases and smoke enter the atmosphere.

• This process changes the natural composition of the air that we breathe.

• It is mainly caused by burning fossil fuels for energy and transportation.

• Major types include smog, CFCs, particulate matter, and acid precipitation.

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Multiple Choice

What is the best definition of air pollution?

• When harmful substances enter the atmosphere

• When trash is left on the ground

• When factories dump waste into rivers

• When loud noises disrupt the environment

Multiple Choice

What is the relationship between burning fossil fuels and the atmosphere?

• Burning fossil fuels is a primary cause of air pollution

• Air pollution is a source of fossil fuels for energy

• Burning fossil fuels helps to clean the atmosphere

• There is no relationship between the two processes

Multiple Choice

If a city increases its use of cars and coal-fired power plants, what is a likely environmental consequence?

• An increase in smog and particulate matter

• A decrease in the atmosphere's temperature

• An improvement in the quality of breathing air

• An increase in the supply of clean water

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Human Impact on Earth's Atmosphere

• Human activities directly affect the overall health of our planet's systems.

• More people using more resources can increase negative impacts on the Earth.

• Burning fossil fuels for energy releases pollutants into the surrounding atmosphere.

• We can reduce these negative impacts by using cleaner energy technologies.

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Multiple Choice

What is the relationship between human activities and the health of Earth's systems?

• They only affect the planet in positive ways.

• They have no significant effect on the planet.

• They can have negative effects on the planet's health.

• They only change the number of people on the planet.

Multiple Choice

Why is burning fossil fuels described as a negative human impact?

• It uses up too many natural resources.

• It is the only way to produce energy.

• It releases pollutants into the atmosphere.

• It makes the planet's systems healthier.

Multiple Choice

If a growing population chooses to invest in cleaner energy technologies, what is the most likely effect on the atmosphere?

• The number of people living in the city would increase.

• The city would use more resources than before.

• The amount of pollution in the air would decrease.

• The overall health of the planet's systems would get worse.

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Smog and CFCs

Photochemical Smog

• ​It is a brownish haze formed when pollution from burning fossil fuels reacts with sunlight.

• ​​This reaction creates harmful ozone gas close to the ground where we live.

• ​This ground-level ozone is dangerous to breathe and can harm both plants and animals.

CFCs & Ozone Layer

• ​The ozone layer high in the atmosphere is helpful as it shields us from the Sun's UV rays.

• ​​Chlorofluorocarbons (CFCs) are chemicals from old refrigerators that rise into the atmosphere.

• ​There, they destroy protective ozone molecules, which thins the ozone layer and lets in more harmful UV radiation.

Multiple Choice

What is photochemical smog?

• A brownish haze formed when pollution reacts with sunlight.

• A layer of gas high in the atmosphere that blocks UV rays.

• Chemicals from old refrigerators that rise into the air.

• A type of helpful gas that is safe for plants and animals.

Multiple Choice

What is the key difference between the ozone created by smog and the ozone in the protective ozone layer?

• Ground-level ozone is created by CFCs, while the ozone layer is created by sunlight.

• Ground-level ozone is helpful to plants, while the ozone layer is harmful to them.

• Ground-level ozone is high in the atmosphere, while the ozone layer is near the ground.

• Ground-level ozone is harmful to breathe, while the ozone layer is protective.

Multiple Choice

If the release of CFCs into the atmosphere were to increase significantly, what would be the most likely consequence?

• An increase in the amount of photochemical smog.

• A decrease in the amount of pollution from burning fossil fuels.

• An increase in harmful UV radiation reaching the Earth.

• An immediate improvement in air quality near the ground.

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Types of Air Pollution

Particulate Matter

• Particulate matter is a mix of solid and liquid particles like smoke, dust, and dirt in the air.

• While some sources are natural, most come from human activities like burning different types of fossil fuels.

• Inhaling these tiny particles can lead to serious health issues such as asthma and other breathing problems.

Acid Precipitation

• Acid precipitation is rain or snow that is more acidic than normal due to certain types of pollution.

• It forms when gases from burning fossil fuels mix with water and oxygen in the atmosphere.

• This type of precipitation can harm or kill plants and animals that live in lakes and forests.

Multiple Choice

What is particulate matter?

• A mix of solid and liquid particles in the air

• Rain or snow that is more acidic than normal

• Gases that mix with water and oxygen in the atmosphere

• A natural energy source from the sun

Multiple Choice

How does acid precipitation form?

• Gases from burning fossil fuels mix with water and oxygen in the atmosphere.

• Dust and dirt particles combine to form clouds.

• Human activities release particles that cause breathing problems.

• Pollution from cars and factories directly turns rain acidic.

Multiple Choice

A city that burns large amounts of fossil fuels is located near several lakes and forests. Based on this information, what is a logical prediction about the long-term effects of the city's air pollution?

• Acid precipitation would harm plants and animals in the nearby lakes and forests.

• The city's air would get cleaner as smoke and dust settle in the water.

• People in the city would experience fewer breathing problems like asthma.

• The lakes and forests would adapt to become more resistant to pollution.

Engineered Solutions and Other Ways to Protect the Atmosphere

• Governments create laws and treaties, like the Clean Air Act, to limit pollutants.

• Engineered solutions include energy-efficient technologies and pollution scrubbers.

• Using renewable energy and individual actions also help protect the atmosphere.

Multiple Choice

What is the primary goal of creating laws like the Clean Air Act and using technologies like pollution scrubbers?

• To limit pollutants and protect the atmosphere

• To make energy more expensive for consumers

• To increase the number of factories in a country

• To reduce the use of renewable energy sources

Multiple Choice

Which of the following is an example of an engineered solution to protect the atmosphere?

• A government passing a law to limit pollution

• An individual person deciding to use less electricity

• A factory installing a pollution scrubber in its smokestack

• A country signing a treaty with other countries

Multiple Choice

A city is experiencing high levels of air pollution. Which plan would be the most effective for protecting the atmosphere?

• A plan that only encourages individuals to drive their cars less.

• A plan that only focuses on developing new energy-efficient technologies.

• A plan that combines new government pollution laws, new technologies for factories, and promoting renewable energy.

• A plan that relies only on international treaties without making any local changes.

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Common Misconceptions

Misconception	Correction
All ozone is bad.	The ozone layer high in the atmosphere is helpful and protects us.
Only big factories cause air pollution.	Everyday activities like driving cars also contribute significantly to pollution.
Technology only causes pollution.	Science provides solutions like renewable energy to reduce our impact.

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Summary

• Population growth and burning fossil fuels cause most types of air pollution.

• This pollution harms human health, ecosystems, and creates harmful ground-level ozone.

• The upper ozone layer is beneficial and protects us from the Sun's UV rays.

• Laws, agreements, and new technologies can help reduce air pollution.

Poll

On a scale of 1-4, how confident are you about the concepts covered in today's review?

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• 4