![Weather station in Iceland](/sites/default/files/styles/resource_card_image_360x300_/public/2019-09/weather-station-in-iceland.jpg?itok=YCQjngav)
Measuring and Forecasting Weather
Backgrounders
Learn about different weather instruments that meteorologists use to measure weather.
![Water droplets on a leaf](/sites/default/files/styles/resource_card_image_360x300_/public/2020-01/Water_droplets_on_leaf.jpg?itok=RDkdH3A-)
Needs of Plants
Backgrounders
Plants have specific needs - light, air, water, nutrients, and space - to survive and reproduce.
![Seeds of a pomegranate fruit](/sites/default/files/styles/resource_card_image_360x300_/public/2019-12/pomegranate-seeds.jpg?itok=TTPg8-ln)
Plant Reproduction
Backgrounders
Learn about pollination and other forms of sexual reproduction in plants. And did you know that plants can also reproduce asexually?
![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?
![Mitosis of kidney cells © Ian P Newton & Paul L Appleton [CC BY-SA 4.0], Wikimedia Commons](/sites/default/files/styles/resource_card_image_360x300_/public/2019-08/600px-Mitotic_MDCKs.jpg?itok=VLMyMgJd)
What is Mitosis?
Backgrounders
Mitosis is an important part of cell division that helps organisms grow and repair themselves.
![dangerous tornado approaching wind turbine](/sites/default/files/styles/resource_card_image_360x300_/public/2019-09/dangerous-tornado-with-wind-turbine.jpg?itok=986v4qAD)
What is a Tornado?
STEM Explained
Tornadoes are a common extreme weather phenomenon in Canada. How are they formed? How can you stay safe? And what is a storm chaser?
![Adult and children looking through telescope](/sites/default/files/styles/resource_card_image_360x300_/public/2019-09/adult_and_children_looking_through_telescope.jpg?itok=eKeL_YGd)
The Optics of Telescopes
Backgrounders
Learn about telescopes, how they work & why they're important to astronomers.
![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.
![Bread and wheat with a warning sign](/sites/default/files/styles/resource_card_image_360x300_/public/2019-09/gluten-intolerance-with-bread-and-wheat.jpg?itok=Ytq99uNA)
Celiac Disease: When You Really Need to Stay Gluten-Free
STEM Explained
Celiac disease is an autoimmune disorder. Gluten triggers an immune system response, seriously affecting nutrition.
![Thundersnow near a cabin on a hillside](/sites/default/files/styles/resource_card_image_360x300_/public/2019-09/Thundersnow_near_cabin_on_hillside.jpg?itok=IugkyK5e)
Thundersnow: winter thunderstorms
STEM Explained
When thunder and lightning occur but the main form of precipitation is snow, not rain, it’s called thundersnow.
![A variety of lava lamps](/sites/default/files/styles/resource_card_image_360x300_/public/2019-09/Assortment_of_lava_lamps.jpg?itok=IsXk69sI)
Lava Lamps
STEM Explained
Lava lamps are very interesting to look at. But they are also interesting examples of buoyancy, heat transfer and solubility!
![Water droplets on succulent leaves](/sites/default/files/styles/resource_card_image_360x300_/public/2019-09/Succulent_leaf.jpg?itok=55kCziIw)
How Do Plants Survive in the Desert?
STEM Explained
Plants need to exchange gases and water with their environment as part of photosynthesis. Some plant cells have evolved specifically for this purpose.
![Rockfall on road](/sites/default/files/styles/resource_card_image_360x300_/public/2019-10/Rock_fall_on_road.jpg?itok=qhSigRl4)
The Processes that Shape Landforms
STEM Explained
Canada has some amazing landforms. Learn how weathering, erosion and deposition shape landforms.
![Hurricane Katrina as seen from space](/sites/default/files/styles/resource_card_image_360x300_/public/2019-11/Hurricane_Katrina_seen_from_space.jpg?itok=zKdK1Yo8)
Where Do Hurricanes Come From?
STEM Explained
Hurricanes are a kind of tropical cyclone. But where do they come from? And why do they cause so much damage? This article will answer all your storm-related questions!
![Infographic creator icon](/sites/default/files/styles/resource_card_image_360x300_/public/2019-11/Infographic_creator.png?itok=lUU6drff)
Infographic Creator
Teaching STEM
This strategy helps students communicate data and information through the creation of infographics.