![Scoop of potting soil](/sites/default/files/styles/resource_card_image_360x300_/public/2019-12/scoop_of_potting_soil.jpg?itok=U1P0nn1x)
What is Soil?
Backgrounders
Learn about soil, soil texture and the various layers of soil.
![Young girl brushing her teeth](/sites/default/files/styles/resource_card_image_360x300_/public/2019-09/Young_girl_brushing_her_teeth.jpg?itok=VQjOohsa)
Personal Hygiene: Caring for Our Teeth
Backgrounders
Information about cavities, plaque, tartar, gingivitis and how to keep teeth healthy.
![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!
![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.
![https://aWhy are peas and corn classed as starches on food guides?www.pexels.com/photo/agriculture-bright-cereal-close-up-547263/](/sites/default/files/2019-08/pexels-corn.jpeg)
Why are peas and corn classed as starches on food guides?
Hands-on Activities
Learn how test foods for starch.
![Why can we see shadows at night?](/sites/default/files/2019-08/why-do-we-see-shadows-at-night.jpg)
Why can we see shadows at night?
Hands-on Activities
Take a walk after dark to find shadows.
![Why do leaves change colour in the fall?](/sites/default/files/2019-08/wiki-autumnleaf.jpg)
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 do oil and water not mix?](/sites/default/files/2019-08/why-do-oil-and-water-not-mix.jpg)
Why do oil and water not mix?
Hands-on Activities
What chemistry determines how oil and water behave when mixed? Explore the mixing of oil and water and the density of liquids in this activity.
![Why do raisins dance in soda pop?](/sites/default/files/2019-08/why-do-raisins-dance-in-soda-pop.jpg)
Why do raisins dance in soda pop?
Hands-on Activities
Let them bop ‘til they drop! What causes these raisins to reach new heights in this hands on activity?
![Two faces each with one eye visible](/sites/default/files/2022-06/two%20eyes%20to%20see.jpg)
Why do we need two eyes to see?
Hands-on Activities
Ever wondered why we have two eyes (and not one, three or more)? Find how your two eyes work together in this hands-on activity.
![Why is everything so small down there?](/sites/default/files/2019-08/why-is-everything-so-small-down-there.jpg)
Why is everything so small down there?
Hands-on Activities
Explore how we see things far and near and from different angles. It's all about perspective!
![ChaoticMind75 - iStock](/sites/default/files/2019-08/why-is-it-colder-in-the-winter-even-though.jpg)
Why is it colder in the winter even though the Earth is closer to the Sun?
Hands-on Activities
Learn why we have seasons in this hands on activity.
![The planet Mars](/sites/default/files/2019-10/Mars.png)
What is your weight on another planet?
Hands-on Activities
Do you weigh the same on Jupiter as you do on Earth? Learn to calculate your weight on a different planet.
![What kinds of transportation are there?](/sites/default/files/2019-08/what-kinds-of-transportation-are-there.jpg)
What kinds of transportation are there?
Hands-on Activities
Go on a transportation scavenger hunt in this hands-on activity. How many different types of vehicles can you identify?
![What makes soil hard and compacted?](/sites/default/files/2019-08/what-makes-soil-hard-and-compacted.jpg)
What makes soil hard and compacted?
Hands-on Activities
Explore how walking on soil changes how water soaks into the ground and why that matters to gardeners and farmers.