Why do leaves change colour in the fall?
Hands-on Activities
How do the green leaves of summer change to vibrant colours in fall? Explore plant pigments in this chromatography activity.
Why is rain not salty?
Hands-on Activities
Make a model of the water cycle and find out how water moves around on planet Earth.
What are Greenhouse Gases?
Backgrounders
This backgrounder explains what greenhouse gases are and how they contribute to climate change.
What are the Pros and Cons of Ethanol Biofuel?
STEM Explained
Biofuels like ethanol might help fight climate change. But they can contribute to food insecurity and greenhouse gases in ways that might surprise you.
What are Carbon Offsets?
STEM Explained
Can carbon offsets help you reduce your environmental footprint, practice sustainable living and fight climate change?
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?
The Water Cycle
Picture Collections
1 diagram illustrating the water cycle
Ringwoodite and the Deep Water Cycle
STEM Explained
The water in the oceans has travelled vast distances. It has even time spent deep below the surface of the Earth, trapped inside the mineral ringwoodite.
Marine Microbiology: Meet the Microbes of the Sea!
STEM Explained
The ocean is full of very small but very useful creatures called microbes. Without them, none of the sea plants or animals you’ve seen would exist!
How does water move up a plant?
Hands-on Activities
Do an experiment with celery to learn about the structures that help plants take up water.
Humidity on Earth and on the ISS
Backgrounders
Humidity is an important part of life on Earth and life in space. This backgrounder explains what humidity is, how it is measured and how it affects us both mentally and physically.
How do I construct a terrarium?
Hands-on Activities
You can make your own terrarium for growing plants!
How Do Introduced Species Affect Ecosystems and the Economy?
STEM Explained
When a species ends up outside of its natural zone, the consequences on other species, ecosystems and human industries can be severe. Climate change and human activities can introduce species into new zones.
Green Walls
STEM Explained
Green walls use plant processes to improve air quality in buildings.
How are Arctic Animals in Canada Affected by Climate Change?
STEM Explained
Arctic animals have evolved to thrive in harsh arctic ecosystems, but the environmental footprint created by climate change is affecting their survival.