Skip to main content

Unit A: The Diversity of Matter and Chemical Bonding

Rolls of aluminum

Chemistry in the Aluminum Industry

Backgrounders

Learn about the role of chemistry in the aluminum industry.

portrait de Chris Murray

Chris Murray

Career Profiles

Associate Professor (Physics)

I teach undergraduate physics and conduct research in biopolymers and environmental technology.
Hand writing chemical equations

Chemical Equations

Backgrounders

Learn about how to write and balance chemical equations.

Colourful liquids and periodic table

Describing and Classifying Matter

Backgrounders

Learn about the physical and chemical properties of matter.

Timothy Burkhart

Query a Career Profile

Lessons

Students will explore career profiles and relate them to what they are learning in science class.

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.

A set of lipstick in various colours

The Chemistry of Lipstick

STEM Explained

Learn about the organic compounds that make up lipstick as well as about some of the chemistry that goes into this popular cosmetic.

plastic food containers, trays and food packaging made from polystyrene

Polystyrene: The Pros, the Cons, the Chemistry

STEM Explained

Learn the organic chemistry behind this very useful plastic. Why is recycling polystyrene hard? Why does polystyrene often end up as solid waste?

An image showing the symbol, atomic number and relative atomic mass of sodium. Sodium’s symbol is Na, its atomic number is 11 and its relative atomic mass is approximately 22.99.  Image © istockphoto.com/3dalia

Na Na Na Na (Hey Hey Hey) Sodium!

STEM Explained

Sodium is a useful chemical element. You consume it as table salt regularly. Learn about salt mining, sodium uses, and what problems too much sodium can cause.

How can I make glue?

How can I make glue?

Hands-on Activities

Discover how to use some common kitchen ingredients to make glue.

Close-up of an amethyst geode

What is a Crystal?

STEM Explained

Learn what makes a crystal a crystal.