Water - Liquid Awesome: Biology #2

Hank teaches us why water is one of the most fascinating and important substances in the universe.

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Review:
Re-watch = 00:00
Introduction = 00:42
Molecular structure & hydrogen bonds = 01:38
Cohesion & surface tension = 02:46
Adhesion = 03:31
Hydrophilic substances = 04:42
Hydrophobic substances = 05:14
Henry Cavendish = 05:49
Ice Density = 07:45
Heat Capacity = 09:10

Citations:
http://www.extension.umn.edu/distribution/youthdevelopment/components/0328-02...
http://www.uni.edu/~iowawet/H2OProperties.html
http://www.hometrainingtools.com/properties-water-science-teaching-tip/a/1274/
http://science.howstuffworks.com/environmental/earth/geophysics/h2o7.htm
http://www.robinsonlibrary.com/science/chemistry/biography/cavendish.htm
http://chemistry.mtu.edu/~pcharles/SCIHISTORY/HenryCavendish.html
http://www.nndb.com/people/030/000083778/
http://www.notablebiographies.com/Ca-Ch/Cavendish-Henry.html

TAGS: water, hydrogen, oxygen, molecule, covalent bond, cohesion, adhesion, polarity, hydrogen bond, surface tension, capillary action, hydrophilic, hydrophobic, ionic bond, ion, universal solvent, henry cavendish, chemistry, specific gravity, density, heat capacity, evaporation, biology, crashcourse, crash course, hank green

Category:

Science & Technology

Tags:

• water
• hydrogen
• oxygen
• molecule
• covalent bond
• cohesion
• adhesion
• polarity
• hydrogen bond
• surface tension
• capillary action
• hydrophilic
• hydrophobic
• ionic bond
• ion
• universal solvent
• henry cavendish
• chemistry
• specific gravity
• density
• heat capacity
• evaporation
• biology
• crashcourse
• crash course
• hank green

[yourLPguru]

"Can penetrate it and come into it" You were smiling a little to much when you said that.

[MissLunaLovegood23]

That awkward smile as he says "can't penetrate and... come in to it." just about made my life.

[TheOwenOver]

Water is a good solvent as the hydrogen-oxygen bond in it allows it to 'hydrogen bond'. Although the Hydrogen and Oxygen are 'sharing' an electron pair, the oxygen attracts the electrons more, creating small negative and positive poles. This allows the water molecules to attract other polar molecules eg salts, and thus dissolve them. It is not very acidic as the hydrogen does not (most of the time) become a free H+ ion, which is what an acid is.

[pianodude817]

...one lizard, and also, one Jesus XD XD XD

[2treehugginghippies]

I'm in the 8th grade and it took my science teacher two months to cover what you did in 11 minute and 17 second. I applaud you!

[ArghCake]

They played this at college ;o during one of our revision session. They said it was "cheesey" but I just sat there oggling at the video. like some huge pervert.

[Joshua Herbison]

But floating ice displaces its weight in water, and if it became more dense it would sink and displace its volume in water, which would be less than its weight in water because it is now more dense. So if the north pole increased in density and sunk it would lower sea levels not raise them.

[superGinntonic]

hank! i have such a huge crush on you!

[YoYoCupcakes]

this is going to help me so much with finals, thanks!

[Kouyou160]

I can't seem to find the answer to my question anywhere, so I'll just ask the people who made me ask it. Why is water such a good solvent, but not acidic enough to give us a chemical burn. Does it have more to do with the fact that we're made of carbon or is some wierd quality that takes a lot of science to explain?

[MagickSpare]

You should add captions

[crazyliclay]

and also one Jesus.......lol