TED-Ed
Reasons for the Seasons
Considering the shape of Earth's orbit and the tilt of its axis, viewers see why seasons occur on the planet. Additional resources that come with the video include a discussion idea, multiple-choice Think questions, and Dig Deeper links...
TED-Ed
Is There a Center of the Universe?
The history of our understanding of the center of the universe is explored through this film. The ideas of Aristotle, Copernicus, Bruno, Descartes, and Herschel are included, as well as the new discoveries that have helped the theories...
TED-Ed
Four Ways to Understand the Earth's Age
Cartoon children compare the earth's age to timescales that we understand:a calendar year, the thickness of a book, the human lifespan. This smart film clip is definitely worth adding to your geologic timescale lesson! If you subscribe...
TED-Ed
Free Falling in Outer Space
How do satellites orbit the earth? Technically they are free-falling, but missing Earth's surface! Being explained in great detail and with entertaining animation, these concepts are sure to amaze your starling scientists! Another plus...
TED-Ed
The Moon Illusion
Does the moon change size? It sure looks like it! Two optical illusions are suggested as an explanation: Ebbinghaus and Ponzo. However, there are problems with both of these. Convergence micropsia may answer the question, but many...
TED-Ed
Sending a Sundial to Mars
You know him from his famous science education videos, but now hear him get personal as he tells the story of how his father, while being a prisoner of war, became fascinated with sundials. Today, he has inherited the fascination, and in...