Search results for “sources d'énergie alternatives”

Light Sources

Explore natural and human made light sources in the environment in this live-action video produced by WGBH. The video can help children observe and identify light sources and describe objects that are visible in the light’s path. Support materials include: Background Reading, Teaching Tips, and Dis

Alternatives to the Majority Voting System

For more Science Videos: https://lt.org/ * With a population exceeding 500 million, the participation of less than 5 million EU citizens in a recent survey on abolishing daylight saving was, to say the least, disappointing. In this video, THOMAS TRÖGER explores how voting rules can be used to accoun

What information can be published on Wikipedia?

Is Wikipedia a reliable source? What information can actually be published on Wikipedia? We try to answer these questions by explaining the basic principles of the neutrality & reliability of sources used when editing an article on Wikipedia. This video was produced in cooperation with Wikimedia Ge

How is the redshift created

The light of the stars reveals their movement. When a light source diverts from us, the light waves are pulled apart. This makes the light more reddish. This redshift reveals that the light source is moving away from us and how fast it is doing that. Author: ZDF/Terra X/ H. Kotarba/ Albrecht M. We

David Lang: My underwater robot

David Lang is a maker who taught himself to become an amateur oceanographer -- or, he taught a robot to be one for him. In a charming talk Lang, a TED Fellow, shows how he and a network of ocean lovers teamed up to build open-sourced, low-cost underwater explorers.nnTEDTalks is a daily video podcast

Dyslexia Reading and writing problems

About 5-10% of all children are born with dyslexia. Children with dyslexia may swap numbers when reading, swap letters when they appear, or skip words when writing. Some see their handwritten letters upside down and others have problems with the grammar rules - writing correctly is often impossible.