Category Archives: IBDP Biology
Excel Graphing Screencasts
These two videos are for my classes, made using the free screencast tool ScreenCast-O-Matic.
The first is for my IB Bio group for setting up a graph for a complex set of data, adding extra datasets, error bars and formatting. The second is a similar video for a simple Physics investigation in Grade 10.
Hopefully they are helpful as you can go back and re-watch important bits as you do the write-ups.
If anyone knows of a decent way to add best-fit curves (lines are easy) to datasets, please let me know!
Ben Goldacre: Battling Bad Science
One of MrT’s science blogging heroes, Dr. Ben Goldacre, runs the Bad Science blog and Guardian column. Over the last few years, he has been dedicated to highlighting the problems of bad science in the media and dodgy claims – by looking at the actual evidence. Some great sources for TOK and Biology, and now he has a TED Talk. Enjoy!
Remember: “Extraordinary claims require extraordinary evidence” [Sagan’s Standard]
A funnier version for an American audience after the jump…
Fighting a Contagious Cancer (and the Guardian Facebook App)
Today’s Guardian has a profile of Elizabeth Murchison on the Grrl Scientist blog. Murchison’s TED Talk explains the work of her team trying to prevent the extinction of Tasmanian Devils (Sarcophilus harrisii) due to a contagious facial cancer, spread by biting.
Scary stuff, with some – very – graphic images.
She mentions the human papilloma virus (HPV), which is responsible for cervical cancer. Their first thought was that the source of this cancer was similar – viral, but that is not the case. In fact, the cells are implanted into other devils through biting – where they colonise and run rampage.
App
Also this week, the Guardian released their Facebook app. You can ‘like’ it into your feeds, as well as the different streams (Science, environment, data, education and more).
With all the apps and fan pages out there, you too could turn your facebook into a feed reader.
Sex, Lies and Cigarettes
I came across this video via Steve Harton’s Hartonline Bio website and clicked on it because of the Indonesia connection. I’m glad I did, though it made me quite angry.
Aldi
Having spent most of the last eight years in Indonesia, I have long been concerned about the ubiquity of the tobacco industry and the all-pervasive nature of the advertising. Everything – literally everything – is sponsored by tobacco. From TV and movies to sports (!), some schools (!!) and music concerts. There is no escaping the message that smoking is cool, good for you and leads to an exciting life.
So how did it get this way when the developed world is shunning the dangers of smoking?
This 40-minute documentary by Vanguard puts it all in context. From the viral video sensation of Aldi the smoking baby, to the simple, ruthless economics of exploiting a developing country and targeting their children as an emerging market, the film-makers lay it out clearly and passionately. It focuses too on the work of an anti-smoking action group who face the huge challenge of taking on big tobacco in a country where so much depends on it – it’s a major cash crop and source of income.
This video is a YouTube upload, but there are clips and resources on the official Vanguard page.
I loved the bit where the Miss Indonesia contestants help the film-maker crash the World Tobacco Asia conference!
Some questions and thoughts to consider when watching the movie:
- Near the end of the movie, there is a quote from Warren Buffett: “I’ll tell you why I like the cigarette business. It costs a penny to make. Sell it for a dollar. It’s addictive. And there’s fantastic brand loyalty.” Although he has changed his stance on tobacco, it neatly illustrates the bottom-line ethos of business.
- As a publicly-owned company, your main responsibility is to the shareholder – you must maximise profits. Discuss the ethics of targeting children in emerging economies as a market.
- Accepted science states that tobacco is addictive and harmful to human health. Why then has this not been recognised by the Indonesian government?
For more good documentaries, have a look at Vanguard's website.
King Corn – we are what we eat, drink and cook with
King Corn
This film came out about a year ago, but I saw it for the first time on the History Channel a couple of days ago. A very enlightening view of the omnipresence of corn and corn-products in our food. From corn-fed beef to corn-starch and high-fructose corn syrup (boo!), industrial production of corn is in all facets of our diet.
In the film, two friends set out to produce an acre of corn and track how it grows and where is goes. Inspired by the Omnivore’s Dilemma and in tune with other recent super-docs (Super Size Me, Food Inc., The End of the Line), King Corn is a sensitive and educational film that manages not to stray into anti-industry polemic.
This extended clip from PBS shows the first 20-minutes of the movie:
It’s amazing to see that the corn farmers can’t even feed themselves with the corn they grow – it is not fit to be eaten! Instead it is bred and grown for maximum starch output. If you get a chance, watch it.
One impactful scene explains how high fructose corn syrup came to be and how it is made. Something to surely make you think twice about the contents of the processed foods we eat. Here’s a challenge – check the labels in the supermarket and see how may products contain it.
i-Biology 