Lab protocols for new IB guide

Seven prescribed experiments

There are seven experiments which are prescribed by the new biology guide.

An understanding of these experiments will be assessed in the new first section of paper 3 on experimental skills.
Students will therefore need to have hands on experience of these experiments in particular. It is expected that short answer, structured questions will assess the skills to carry out the experiments, analyse the data and evaluate the results

This page is a catalogue of links for each of the prescribed labs in the new guide.
Scroll down to see the list of labs and thumbnails of the links.

P1 1.1 Calculation of magnification of drawings, actual size of structures from drawings or micrographs: Bookmark Links


P2 1.4 Estimation of osmolarity in tissues Comparative, potato/sweet potato, sodium chloride solution/ sucrose solution: Bookmark Links


P3 2.5 Investigation of a factor affecting enzyme activity: Bookmark Links


P4 2.9 Separation of photosynthetic pigments by chromatography: Bookmark Bookmark Links


P5 4 Attempting to create a sealed mesocosm - Garden in a bottle: Bookmark Links


P6 6.4 Monitoring of ventilation at rest and after mild and vigorous exercise. Bookmark Links


P7 9.1 Measurement of transpiration rates using potometers: Bookmark Links

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Comments 12

Elizabeth Villa 18 April 2017 - 07:39

Hi David!, at the beginning of the page it says: This page is a catalogue of links for each of the prescribed labs in the new guide.
Scroll down to see the list of labs and thumbnails of the links...But there are no links...is that a mistake? Do I have to click another link? Thanks!!!

Edward Koo 20 April 2017 - 02:55

I also do not see any links. I all see are the names of the labs. Thanks.

Vanessa Omer 25 April 2017 - 11:01

Same comments as above - there are no links to the prescribed labs. Please can you advise. Thank you.

Karl Schauer 5 May 2017 - 19:44

I'm also having trouble viewing the links. They show up on my phone, but on the desktop they aren't there. Tried safari, chrome and firefox...Any ideas?

Rebecca Patrick 5 May 2017 - 22:06

I had the smae problem in Chrome, but I was able to fix it by allowing the page to "allow unsafe scripts", which is found on the left hand side of the browser bar.

Karl Schauer 6 May 2017 - 11:03

Thanks Rebecca, that fixed it for me too!

David Faure 14 May 2017 - 13:11

Dear Rebecca, Thank you for sharing this. I am aware of the problem for this content and I am working on a proper solution. It's caused by my using a third party tool to display the content. magzinr.c / Best wishes, David

Basem Alaeddine 11 May 2017 - 09:56

Dear David
How are you, we are new school implementing IB, can you please inform how many lab experiments we have to do in the course. What are essential topics students should investigate about it.

David Faure 21 May 2017 - 21:52

Dear Basem,
Thanks for your message. There is not any exact answer to your question as you have quite a lot of choice in the labs which you ask students to do, but you should keep a list of practical work, including simulations and write-ups (Called a PSOW - "practical scheme of work"). The total hours for this work should be 40hrs for SL and 60hrs for HL. However 10 hours is the Group 4 project, and 10hrs is used in the Individual investigation (IA). As a rough guide I would suggest you try to include one piece of practical work per week for SL and two for HL Students need to learn practical skills and these skills are assessed in two or three places. In paper 2 and paper 3 there are data based questions which expect candidates to be able to interpret graphs, calculate from results, and describe trends. In paper 3 section A there are questions assessing the Nature of Science and specific practical skills from the course, this could be questions about the seven 'prescribed practicals' but it is not limited to those labs, and might be about skills mentioned in the guide. There is a list of practical skills mentioned in the IB Bio guide on this page of the Inthinking Bio site, thinkib.net . It might be useful.
I hope these ideas are helpful. Best wishes in your implementation of the IB, David

Basem Alaeddine 23 May 2017 - 08:54

Thanks alot

David Faure 21 May 2017 - 22:00

Dear All, As a temporary measure I have added a direct link to the bookmarks for each experiment. I am working on a better way of showing these links in the near future. Best wishes, David Faure

David Faure 22 May 2017 - 01:16

The reason these links are no longer showing is because the browser is blocking potentially unsecure scripts on the page, called "mixed content blocking". It is possible to view the content by disabling this protection for this page. Read more about this on Firefox here; support.mozilla.org and for chrome browser here; support.google.com
I hope this helps. David


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