Is aerobic exercise good for you?

You should all by now be familiar with the school motto  “mens sana in corpore sano” translates into English as “a healthy mind and a healthy body”. Todays Crosslauf is an expression of the school`s motto, but what does science have to say about the link between mind and body, is there any scientific evidence to support a positive link between the two?

Mrs Warner came across THIS article from the BMC which talks about the positive effects that can be enjoyed by walking, follow the links in the article to check out the evidence – is the evidence presented “scientific” evidence or opinion (TOK LINK)

The book below (I am not sure if we have it in the library – I will order it if we don`t)


discusses the link between aerobic exercise and neural development and has many referenced studies which confirm that not only is cardio-vascular exercise good for your cardiovascular system, it has many other positive effects ESPECIALLY regarding brain function and development. So if you want to be more successful in the classroom, get outside and run or walk!

Time for Topic 2, CELLS

Well the first topic on statistical analysis seemed to go by quickly. Don’t worry if you feel like you could do with spending more time on  this topic, we will re-visit the concepts covered in Topic 1 many times over the next 2 years. We are now about to start Topic 2:Cells.

Here is the outline of the subjects we will cover in this topic topic-2-syllabus-outline. The good thing about studying cells is that we get to use microscopes, and at LAZ we have some really awesome microscopes! Remember that being proficient with the use of a microscope is a skill that needs to be developed, so don’t worry if you have difficulty seeing clear images first time. Keep practicing and you will get better!

Image from

Image from

In case you can’t remember the parts of a microscope check out You will need to learn these labels. In order to get the most out of your microscope you will need to be able to measure the dimesions of the things you are viewing. Follow this link for an excellent tutorial on how to Calibrate your microscope.

While we are talking about microscopes and looking at really small things, how small is small? You need to have an appreciation of the relative sizes of cells /bacteria/viruses/cell membranes/molecules etc. Two good web based resources for this are and . Don’t want to go on-line, that is fine just check out your text book.

We will also be using THIS teaching resource from Stephen Taylor, you will come across his name many times during this course as we will use many of his powerpoints

Welcome to the DP1 Biology Blog

Welcome to the DP1 Biology blog. On this blog I will post useful resources to support you through the IB DP1 Biology course, both SL and HL students alike. In the words of the Beatles this blog is here to offer you a little

In the lesson today both my class and Ms. Warner`s classes will be studying together Topic 1 statistics. We will be using THIS handout. I have printed out a hard copy for each of you but have also included it here as we will be practising using excel to present and process our data.

There is also this PowerPoint on t-testing produced by one of my former colleagues Nadine Dickinson.

Not sure what you will be covering in topic 1, well here are the Topic 1 Curriculum Statements

You will notice from the Topic 1 Curriculum statements that the last statement says ”

1.1.6    Explain that the existence of a correlation does not establish that there is a causal relationship between two variables”.

There are many web sites/entries devoted to this section of the course. It never ceases to amaze me how many supposedly educated people make fundamental mistakes when it comes to  mistaking a relationship between two variables as being cause and effect. This article from Wikipedia will give you a good understanding though we do have the following book in the library which is both a very entertaining read, and full of examples where correlation and causation are confused (sounds like TOK to me)


Haven’t time to read the book but wish to know more, check out the Freakonomics website here

When we have completed this topic a good summary can be found at Bioninja. There is actually a Bioninja app that is very useful by way of a revision tool, but unfortunately the app is only available for Iphones, for the rest of us you will have to access the Bioninja web site for windows.

Finally (for now) also find enclosed the IB Bio syllabus. I would recommend that you familiarise yourself with this document.