3.1 Chemical Elements and Water


Source Unknown, but wow!

Hydrogen bonding


The Properties of Water

Crash Course Biology: Water – Liquid Awesome by Hank.

Water as a solvent

The diving bell spider uses surface tension and a little bit of web-gineering to build a bubble to allow it to live and exchange gases underwater. Click here to read more (as well as see a cool slideshow). Here’s a video:

How does water behave in zero gravity? Let’s find out at the international space station (this is really good):


TOK: Water and Homeopathy

"Alternative Literature" from xkcd.com

“Alternative Literature” from xkcd.com

Here’s a very funny Mitchell and Webb clip about homeopathy:

Click here for more ToK and Biology about Chemical Elements and Water, homeopathy and pseudoscience.


The Looming Global Water Crisis

For more resources, click here. What’s your Water Footprint?

To what extent does where you live experience water stress?

World Water Council: Global Water Stress

Here is Sonaar Luthra’s simple solution to testing water safety. Find out a little bit more about how it works here.

Frozen Planet challenge – explain this (brinicle)!

Key terms: elements, ions, compounds, water, cohesion, organic, inorganic, tension, thermal, solvent, sodium, nitrogen, carbon, oxygen, hydrogen, potassium,

  1. Dr.Sreekala Pillai

    Dear steven, thanks a lot for developing this site. i have been using it for the past three years and i feel every time time when i prepare my lessons using your site, i feel im learning more. thanks a lot

  2. I really appreciate all your work on this site. I am a newbie to the whole IB program. Your site is my new top bookmark!

    • Hi Bryan,

      Thanks for the comment. I followed the link to your own blog and will read it with some interest – I am now teaching mostly MYP Grade 10 Physics (and some Chem and IB Bio).

      Good luck!


  3. I don’t know how to thank you, seriously. I’m an IB Student and this site is by far the best!
    I have my exam tomorrow, I am hopeful that I’ll do well!

  4. Dear Stephen,
    You have been such a help, especially for a new IB teacher like me …. I feel that there is so much more to learn still….that’s why we are lifelong learners and hope our students also be the same.. Thank you for sharing the humongous resources.


  5. Dear Stephen,
    I am a 12th grade student taking bio.
    I used to hate biology a lot. My grades were really bad, but I didn’t even try to make them better…. but thanks to this site, I really like bio now. I’ve been looking at your site for reviewing for tests, and I’m an A student now!

    Thank you for making this site!


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