MinuteEarth
How Birds Almost Escalated The Cold War
To find out how you can help Nature Canada protect at least 30% of the world’s lands and ocean by 2030, visit https://www.naturecanada.ca/?utm_source=MinuteEarth. A technology to ignore birds on radar ended up being useful to study and...
MinuteEarth
Why Do Rivers Have Deltas?
Where rivers meet the ocean, coastlines tend to bend either inward or outward, creating estuaries and deltas. But how do they get those shapes? A huge thank-you to the following organizations, all working toward sustainable deltas, for...
NativLang
Euroversals - Are all European languages alike?
Europe is full of languages! Actually, it may be full of ONE kind of language... Meet Standard Average European! Subscribe for language: https://www.youtube.com/subscription_center?add_user=NativLang Be my patron:...
Curated OER
How Do You Classify Quadrilaterals?
A rectangle, a rhombus, a square, a trapezoid, and a parallelogram, are these quadrilaterals? What are the criteria that make and shape a quadrilateral? It has something to do with parallel sides, congruent sides, and congruent angles....
Curated OER
Types of Polygons - Geometry Help
If it has three sides it's a triangle! Learn about the different types of polygons and how they are classified by the number of sides they have. This clip clearly defines each type of polygon, but fails to show examples.
Curated OER
What is a Regular Polygon?
What makes a polygon a regular polygon? Does this mean there are irregular polygons? For a polygon to be classified as a regular polygon, all the sides must be congruent and all the angles must be congruent. Those are the two rules that...
PBS
Sponge Animation: Spicules
Many people think of sponges as being soft, but that's not the case in the ocean. Viewers learn about the sponge skeleton made of hard crystal material. They observe the many unique shapes and understand how scientists use these shapes...