![Kara Layton sous l'eau en habit de plongée sous-marine](/sites/default/files/styles/career_image/public/2020-01/Kara%20Layton.jpg?itok=CQIT6mnu)
Kara Layton
Postdoctoral Fellow
![Students collaborating](/sites/default/files/styles/resource_card_image_360x300_/public/2019-11/Read-view-listen.jpg?itok=XbNhWBtN)
Introduction to the Fish Market Survey
Lessons
In this introductory activity, students will read two articles about the issue of fish mislabelling and complete two graphic organizers to identify the issue, its implications and possible solutions. They will complete the organizers individually and in pairs, and then discuss the results with the whole class.
![Cartoon leaf holding an umbrella over baby plant](/sites/default/files/styles/resource_card_image_360x300_/public/2019-09/cartoon_acid_rain.jpg?itok=J4BMIwgR)
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?
![fossil plants and animals](/sites/default/files/styles/resource_card_image_360x300_/public/2019-09/fossil_plants_and_animals.jpg?itok=jdZrg_LM)
Why Scientists Believe in Evolution
STEM Explained
Scientists have accumulated so much evidence in the theory of evolution that it is one of the most widely-accepted theories in science.
![Arctic pack ice](/sites/default/files/styles/resource_card_image_360x300_/public/2021-03/arctic_ice_pack.jpg?itok=-rJJdc-Q)
Why Don't Fish Freeze in Cold Arctic Waters?
STEM Explained
Ever wonder how fish survive in the cold waters of the Arctic and Antarctic? It’s partly because of a brilliant evolutionary adaptation.
![Why is rain not salty?](/sites/default/files/2019-08/why-is-rain-not-salty.jpg)
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.
![Solar panel project in Dakar, Senegal](/sites/default/files/styles/resource_card_image_360x300_/public/2019-11/Solar_project_Dakar%2CSenegal.jpg?itok=q64WAuqV)
What are Carbon Offsets?
STEM Explained
Can carbon offsets help you reduce your environmental footprint, practice sustainable living and fight climate change?
![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.
![Biofuel concept](/sites/default/files/styles/resource_card_image_360x300_/public/2019-09/biofuel-concept.jpg?itok=mGz1FUEJ)
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.
![Nitrogen symbol from periodic table](/sites/default/files/styles/resource_card_image_360x300_/public/2021-03/the-periodic-table-element-nitrogen.jpg?itok=bs_Xbeg4)
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?
![Red Onion, Parsnips, Lettuce Red Onion, Parsnips, Lettuce](/sites/default/files/styles/resource_card_image_360x300_/public/ropl.jpg?itok=v3BvJdhW)
Vegetables
Picture Collections
14 images of some plants such as carrots, cabbage and leeks whose roots, stems or leaves are used for food
![DNA barcoding used to test food](/sites/default/files/styles/resource_card_image_360x300_/public/2020-02/DNA_barcoding_food_testing.jpg?itok=Hidu7x3v)
The Classification of Life: From Linnaeus to DNA Barcoding
Backgrounders
Learn about two taxonomy systems that scientists use to classify the life around us.
![Water](/sites/default/files/styles/resource_card_image_360x300_/public/5617.jpg?itok=csETRJXO)
The Water Cycle
Picture Collections
1 diagram illustrating the water cycle
![Cartoon mammoth](/sites/default/files/styles/resource_card_image_360x300_/public/2019-10/Cartoon_mammoth.jpg?itok=yPc7tmR_)
Should Scientists Clone Extinct Species?
STEM Explained
Cloning makes it possible to bring extinct species back to life. But is that a good idea?
![Iguana Iguana](/sites/default/files/styles/resource_card_image_360x300_/public/photo-1428542244207-0aaec316e609.jpg?itok=b0mH_hlU)
Reptiles
Picture Collections
10 images of some cold-blooded vertebrates such as snakes, lizards and alligators typically having dry, scaly skin