Maths for Science


Volumes can puzzle people. The best solution is to get out and actually measure some volumes using the litre jug in your house. Make a cake or some recipe that involves measuring out the correct volumes. Pancakes need a certain volume of milk in them. Sauce mixes from packets usually need you to add some water. 
Have a look at these worksheets I made up for somebody who didn't like working with volumes ! They might help you to understand more about how litres and cm3 relate to each other.

Now try these two :
A quick way to convert from cm3 to litres is to divide by 1000.
So to put 25cm3 into litres you would divide 25/1000 to get 0.025 litres.

Cross Multiplying

This is really useful in Biology and Chemistry or indeed anywhere !
Reading from Graphs
Still to do - but something a lot of people seem to struggle with.

Percentage Increase and Decrease

To work out the value for a percentage increase or decrease, you need the starting value and the end value. Then use this formula. It works for a percentage increase or decrease !

Symmetry is very important in Biology
Here are some examples - see what ones you can spot
and they also mention here a Fibonacci sequence - quite complex maths which explains some quite complex patterns spotted in Biology

Index Notation
This comes up in all the courses so if you are not sure about why 0.1 is written as 1 x 10-1 then click here

SI Units
You should know about the SI units of measurement and mass - here is an explanation :
The Système International d'Unités (SI), is the list of units which measurements are based on in the metric system and which are used by scientists to have a standard when carrying out experiments.

For example the basic unit of length that is used is metres (m), time is measured in seconds (s), mass has a base unit of kilograms (kg), thermodynamic temperature is measured in kelvins (K),  amount of substance is taken as the mole (mol).

This video may help you to change units :

Here is another useful resource - "How to use your Casio Scientific Calculator" - useful if you haven't been shown at school - also make sure you know what the dot means eg if you divide 1 by 3 the answer should be 1.333333 ... etc recurring - but you will see this on your screen as 1.3 with a dot above the 3 ... it means it recurs or repeats ...

If you don't know how to do this, print this out - its useful for all the calculations in Unit 1 or just useful anyway if you can get the hang of this !


I 'm Jen Wilson and I tutor  Chemistry, Biology and Human Biology  at Higher and Advanced Higher  in Scotland.    Tutoring Subjects ...