1
By TED-Ed
Water covers over 70% of the Earth, cycling from the oceans and rivers to the clouds and back again. It even makes up about 60% of our bodies. But in the rest of the solar system, liquid water is almost impossible to find. So how did our planet end up with so much of this substance? And where did it...
Grade Level   K 1 2 3 4 5 6 7 8 9 10 11 12
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2
By TED-Ed
Published in 2016
With riing temperatures and seas, massive droughts, and changing landscapes, successfully adapting to climate change is increasingly important. For humans, this can mean using technoogy to find solutions. But for some plants and animals, adapting to these changes involves the most ancient solution...
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3
By TED-Ed
Published in 2014
Solar power is cheaper and more sustainable than our current coal-fueled power plants, so why haven't we made the switch? The real culprits here are the clouds, which make solar power difficult to control. Alexandros George Charalambides explains how solar towers and panels create electricity and...
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4
By TED-Ed
Published in 2013
In this brief talk, Saul Griffith unveils the invention his new company Makani Power has been working on: giant kite turbines that create surprising amounts of clean, renewable energy.
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5
By TED-Ed
Published in 2013
Fresh water accounts for only 2.5% of Earth's water, yet it is vital for human civilization. What are our sources of fresh water? In the first of a two part series on fresh water, Christiana Z. Peppard breaks the numbers down and discusses who is using it and to what ends.
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6
By TED-Ed
"Energy is neither created nor destroyed -- and yet the global demand for it continues to increase. But where does energy come from, and where does it go? Joshua M. Sneiderman examines the many ways in which energy cycles through our planet, from the sun to our food chain to electricity and beyond....
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7
By TED-Ed
Published in 2013
While the Earth's oceans are known as five separte entities, there is really only one ocean. So, how big is it? As of 2013, it takes up 71% of the Earth, houses 99% of the biosphere, and contains some of Earth's grandest geological features. Scott Gass reminds us of the influence humans have on the...
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8
By TED-Ed
Published in 2014
How could you dispose of your cooking oil when you're done cooking? The easiest thing to do might be to pour it down your drain -- but if you save it up and send it to a processing plant, it can gain useful new life as biodiesel, a biodegradable energy source which can run in diesel engines instead...
Grade Level   3 4 5 6 7 8 9 10 11 12
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9
By TED-Ed
Published in 2015
We’ve all been told that we should recycle plastic bottles and containers. But what actually happens to the plastic if we just throw it away? Emma Bryce traces the life cycles of three different plastic bottles, shedding light on the dangers these disposables present to our world.
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10
By TED-Ed
Published in 2016
The Earth intercepts a lot f solar power: 173,000 terawats. That's 10,000 times more power than the planet's population uses. So is it possible that one day the world could be completely reliant on solar energy? Richard Komp examines how solar panels convert solar energy to electrical energy.
Grade Level   4 5 6 7 8 9 10 11 12
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