Importance of water for life | Chemistry of life | AP Biology

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Importance of water for life | Chemistry of life | AP Biology | Khan Academy

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Discussion of the properties of water that make it essential to life as we know it: polarity, "universal" solvent, high heat capacity, high heat of vaporization, cohesion, adhesion and lower density when frozen.
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Пікірлер: 42

@Sen0rAwesome 3 жыл бұрын

Sal explains this so well that I grasped it playing at 1.75 speed. Amazing. Thanks Sal.

@MrToweleySlowMo 3 жыл бұрын

Weird flex but ok

@ecstatica50 3 жыл бұрын

@@MrToweleySlowMo its 2021 bruh move on

@MahmoodSaeedB 11 ай бұрын

@@ecstatica50 It's 2023 now.

@NzxtShinobi 2 ай бұрын

@@MahmoodSaeedB 2024 actually

@tyloreaton9275 5 жыл бұрын

first on khan ACADEMY!!!

@bishwanathsharma6174 5 жыл бұрын

Khan Academy is the best on teaching

@murators4732 5 жыл бұрын

Thanks for the Vid. Would highly recommend to Check Victor Schauberger and his studys of water and Dr. Masaru Emoto study about water and Rice (Consciousness) Experiment.

@Fahim4Shikder 5 жыл бұрын

I love this Channel...so helpful😍

@rayindaputri1656 5 жыл бұрын

can you please make videos about Geography?

@Ganpatthealth 6 ай бұрын

The last two sentences to this video are so profound, could you please do a video on that?? Thank you

@uniboy13 3 жыл бұрын

I'm love khan videos! Very big learning and still funny videos

@chissstardestroyer 2 жыл бұрын

About water freezing "top-down" in a body of water: that's exactly how life could've survived and developed during the gobal ice-coverings that've happened in the Earth's geological history; where the entire Earth was covered by at least meter-thick ice even at the equator, but *chemical synthesis, not photosynthesis* is how life originally got nutrients; so life on Earth is not that dependent upon the sun.

@AriaHarmony Жыл бұрын

I wouldn't say "is", maybe WAS not that dependent on the sun in earlier stages, but I am not sure the energy hungry creatures we have today would've ever arose without photosynthesis.

@chissstardestroyer Жыл бұрын

@@AriaHarmony Well, we know from biology, including botany, that photosynthesis is more efficient; and it is natural for a lifeform to become dependent on the most efficient means of getting nurishment/food; so that naturally follows that what we've discerned to be the most likely guess would be most probable; as a niche is a lifeform's job: how it gets its nutrients.

@Autotunethyeveryday 5 жыл бұрын

@khanacademy In Kurt Vonnegut's novel "Cat's Cradle" Ice-9 is a substance that when in contact with water it freezes everything. Would this substance be possible based on tweaks in how the hydrogen bonds function?

@AnnA33P 4 жыл бұрын

Amazing!! Thank you :)

@chissstardestroyer 2 жыл бұрын

Why would water be a bent molecule as opposed to a line, due to how the charges like to repel similar charges?

@jimachbolwie4516 3 жыл бұрын

Thanks from south sudan

@KissMyBalls Жыл бұрын

4:30

@chissstardestroyer 2 жыл бұрын

I'm not sure, Mr. Khan, so you should review the video to check me on this, but it seems as though you wrote "Ice is less dense *that* liquid water." as opposed to "Ice is less dense *than* liquid water." You probably should check out my reply in this case, just to be sure. It was right about seven minutes into the video; just for an estimate.