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States of Matter

Katie Mack headshot

Katie Mack (she/her)

Hawking Chair in Cosmology and Science Communication

I study of the fundamental physics of the universe.
physical and chemical changes header

Exploring Physical and Chemical Changes

Students observe and classify physical and chemical changes of matter.

Sea ice

Ice on Earth - The Cryosphere

Learn about the cryosphere and how it is being impacted by climate change.


Weather: Precipitation

Learn about humidity and the many forms of precipitation.

Ice technician on a zamboni at an outdoor skating rink

The Hidden Heroes of Hockey!

Ice Technicians use math and physics in order to keep the ice ready for hockey.

Solid, liquid and gas

States of Matter

Learn about the states of matter, as well more about one state in particular - gas!

Why is rain not salty?

Why is rain not salty?

Make a model of the water cycle and find out how water moves around on planet Earth.

People playing ice hockey

Why Do Ice Rinks Stay Frozen?

Every ice rink is an example of molecular bonding and gas laws at work!

The water cycle

What is the Water Cycle?

Students develop the skills of observing and recording observations as they explore how the water cycle works.

General Motors Place

Keeping the Rink on Ice

Learn about the chemistry of ice skating rinks, and the technology & engineering that lets us enjoy them indoors as well as outside.

Is it a liquid or a solid?

Is it a liquid or a solid?

Make some goop that has the properties of a liquid and a solid.

How much of an iceberg is on top of water?

How much of an iceberg is on top of water?

In this hands on activity find out just how much of an iceberg is below the surface. It might surprise you!

How can I make glue?

How can I make glue?

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