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Unit B: Chemistry and the Environment

Boat on a lake at sunset

Humans and Freshwater Ecosystems

Backgrounders

Learn about how people impact the ecosystems of lakes and rivers.

Some examples of biomass

Generating Electricity: Biomass

Backgrounders

Learn how biomass can be used to generate electricity.

Ian Cook

Ian Cook

Journeyman Sheet Metal Worker

Ian Cook is a Journeyman Sheet Metal Worker for Whisper Heating and Cooling.
Coal and natural gas fueled generator near Hanna, Alberta, Canada

Generating Electricity: Fossil Fuels

Backgrounders

Learn how energy from fossil fuels can be used to generate electricity.

Skyglow from a city and highway

Light Pollution

STEM Explained

Light can be a type of pollution. Learn about the damage it causes to people and living things as well as how you can prevent it.

Photo de Sheila Sadler au travail

Sheila Sadler

Sheet Metal Journeyperson

Sheila Sadler is a Sheet Metal Journeyperson for Viaduct Sheet Metal.
Platinum crystals

Catalytic Converters

STEM Explained

Learn about how catalytic converters make vehicle emissions less harmful.

Cartoon leaf holding an umbrella over baby plant

What is Acid Rain?

STEM Explained

Acid rain is any precipitation that has an unusually low pH. It can be rain, snow, fog, etc. But what is a low pH and why is this a problem?

Hamilton Street Railway bus in downtown Hamilton, Ontario © Adam E. Moreira [CC BY-SA 3.0], Wikimedia Commons

Fueling Internal Combustion Engines

Backgrounders

Learn about the wide variety of fuels used in vehicles.

Hamilton, Ontario industrial area with Toronto skyline in the background

What are Greenhouse Gases?

Backgrounders

This backgrounder explains what greenhouse gases are and how they contribute to climate change.

What are the best materials to use for cleaning water?

What are the best materials to use for cleaning water?

Hands-on Activities

Water is a precious natural resource. What happens if it gets polluted? Learn how water can be cleaned with this hands-on activity?

What are the effects of acid rain on rocks?

What are the effects of acid rain on rocks?

Hands-on Activities

Learn about the chemical reaction that happens between acid rain and limestone.

Nitrogen symbol from periodic table

Understanding the Nitrogen Cycle

STEM Explained

What is the nitrogen cycle? How do human activities such as using fertilizer affect the nitrogen cycle? How can this cause greenhouse gases?

Students looking bored in class

Is There Too Much Carbon Dioxide in Your Classroom?

STEM Explained

Did you know that too much carbon dioxide in the classroom can affect your body, and even your grades?

illustration of a hydrogen car

The History and Uses of Hydrogen

STEM Explained

Hydrogen’s tendency towards combustion is what makes it both a dangerous chemical element and a useful energy source.