Skip to main content

Big Idea: Matter and energy are conserved in chemical reactions.

Green chemistry industry icon

Introduction to Green Chemistry

STEM Explained

Green chemistry is a field that looks at the sustainability of products and processes designed by people.

Cars driving through thick smog

How Vehicles Pollute the Air


Learn how vehicles affect air quality, including their contribution to smog.

fuel cell car header

Hydrogen Fuel Cell Vehicles


Learn about vehicles that use hydrogen for fuel.

Shari Forbes à l'extérieur du centre de décomposition humaine

Shari Forbes (she/her/elle)

Career Profiles

Forensic Scientist

I conduct research to understand how the human body decomposes in our unique Canadian environment.
Heating a liquid over a flame in a lab

Types of Chemical Reactions


Learn about the four main types of chemical reactions.

Test tubes with colourful liquids

Evidence of Chemical Change


Learn how to tell if a chemical reaction has taken place.

Electroplating equipment

Chemical Reactions: Conditions & Speeds


Learn about the special conditions that let some chemical reactions take place.

Solutioneers Episode 5 screen shot

The Solutioneers Week 5: Chemical Bonding


This week's episodes and hands-on activity explore some cool chemistry!

Platinum crystals

Catalytic Converters

STEM Explained

Learn about how catalytic converters make vehicle emissions less harmful.

Blue whale swimming

Can Whales Really Explode?

STEM Explained

When deceased whales wash up on shore, people fear they might explode. Gas laws, decomposition reactions and organic chemistry can help us understand this fear.

Browning apple

Why Do Apples Turn Brown After You Cut Them?

STEM Explained

Has your fresh juicy apple turned an unsightly brown? Learn about the redox reaction behind the transformation.

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


Learn about the wide variety of fuels used in vehicles.

Cartoon of people cleaning teeth

How can chemistry help you take care of your teeth?

STEM Explained

What are your teeth made up of? What chemistry is at work in your mouth? Why do some people get cavities even if they brush regularly?

A melting world-shaped glacier

What is Ocean Warming and Why Does It Matter?

STEM Explained

Oceans absorb the greatest amount of solar radiation on Earth. Ocean warming can lead to glaciers melting and ocean acidification.