![Hamilton Street Railway bus in downtown Hamilton, Ontario © Adam E. Moreira [CC BY-SA 3.0], Wikimedia Commons](/sites/default/files/styles/resource_card_image_360x300_/public/2019-08/Hamilton%20Street%20Railway%20bus%20in%20downtown%20Hamilton%2C%20Ontario%20%C2%A9%20Adam%20E.%20Moreira.jpg?itok=1ZSDJMZQ)
Fueling Internal Combustion Engines
Backgrounders
Learn about the wide variety of fuels used in vehicles.
![Cartoon of people cleaning teeth](/sites/default/files/styles/resource_card_image_360x300_/public/2019-09/Cartoon_dentists_cleaning_a_tooth.jpg?itok=vK4Ow00y)
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](/sites/default/files/styles/resource_card_image_360x300_/public/2019-11/melting_world-shaped_glacier.jpg?itok=-lrMUAJG)
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.
![What speeds up a chemical reaction?](/sites/default/files/2019-08/what-speeds-up-a-chemical-reaction.jpg)
What speeds up a chemical reaction?
Hands-on Activities
Learn about the role of yeast in this fun decomposition reaction.
![What are curds and whey?](/sites/default/files/2019-08/what-are-curds-and-whey.jpg)
What are curds and whey?
Hands-on Activities
It starts with curds and whey! Explore the basic chemistry behind making cheese in this hands on activity.
![Hamilton, Ontario industrial area with Toronto skyline in the background](/sites/default/files/styles/resource_card_image_360x300_/public/2019-09/the-hamilton-industrial-area-with-toronto-skyline.jpg?itok=shKtb5Tb)
What are Greenhouse Gases?
Backgrounders
This backgrounder explains what greenhouse gases are and how they contribute to climate change.
![What are the effects of acid rain on rocks?](/sites/default/files/2019-08/what-are-the-effects-of-acid-rain-on-rocks.jpg)
What are the effects of acid rain on rocks?
Hands-on Activities
Learn about the chemical reaction that happens between acid rain and limestone.
![What happens when acids and bases mix?](/sites/default/files/2019-08/what-happens-when-acids-and-bases-mix.jpg)
What happens when acids and bases mix?
Hands-on Activities
Learn about acid-base reactions. Make you own pH indicator and test it with different solutions.
![What is an exothermic reaction?](/sites/default/files/2019-08/what-is-an-exothermic-reaction.jpg)
What is an exothermic reaction?
Hands-on Activities
Things are heating up! Explore the temperature change that occurs in an exothermic reaction and the role of catalysts is this chemistry activity.
![Soapy hands](/sites/default/files/styles/resource_card_image_360x300_/public/2019-10/soapy_hands.jpg?itok=22VihjnH)
Stupendous Suds
STEM Explained
Every time you wash your hands with soap, there are complex chemical reactions taking place.
![Is there a difference between baking powder and baking soda?](/sites/default/files/2019-08/is-there-a-difference-between-baking-powder-and-baking-soda.jpg)
Is there a difference between baking powder and baking soda?
Hands-on Activities
Explore acid-base chemical reactions that really get things bubbling in the kitchen!
![illustration of a hydrogen car](/sites/default/files/styles/resource_card_image_360x300_/public/2019-10/Hydrogen_car.png?itok=-Ul7H9-e)
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.
![How do I construct a terrarium?](/sites/default/files/2019-08/how-do-i-construct-a-terrarium.jpg)
How do I construct a terrarium?
Hands-on Activities
You can make your own terrarium for growing plants!
![How does rain become acidic?](/sites/default/files/2019-08/how-does-rain-become-acidic.jpg)
How does rain become acidic?
Hands-on Activities
Learn how to make a pH indicator and test water samples.
![How can I stop bananas from turning brown?](/sites/default/files/2019-08/how-can-i-stop-bananas-from-turning-brown.jpg)
How can I stop bananas from turning brown?
Hands-on Activities
Explore the chemistry behind why bananas turn brown. Can chemistry also help prevent this?