The link above takes you to a lesson on how to calculate mean, median and mode as well as covering how to round decimals
Significant figures & percentage change
The link above takes you to a lesson on how to round using significant figures (particularly important for Science exams, it's a common part of calculation questions!). Calculating percentage change is also relevant, as this is a way to allow comparisons in experiments - an example of this is the osmosis practical where chips may have different starting masses.
Calculation questions in Science will often ask you to give your answer to _ significant figures. This is a very easy mark to miss out on in exams!
Calculating area & volume are important skills in Science - we look at how these affect the rate of chemical reactions as well as how living things can alter their surface area to make exchange more efficient
Once a scientist has decided on a question that they want the answer to, they will need to plan their investigation. This includes identifying all of the variables that need to be changed, measured or kept the same.
The variables have been identified and the plan is written. The next step is to carry out the investigation safely!
Now that the investigation is complete, the next step is to begin to analyse the data that has been collected. This is a key step in the process, as it allows the data to be presented in ways that help to draw conclusions.
What does the data tell you? Does it answer the original question that the investigation was designed for?
The investigation is complete, the data has been analysed and conclusions have been drawn. Could the investigation be improved or extended?
Graph skills 1: continuous & discrete data
You need to be able to work out which type of graph you need to draw for a particular set of data. This will lead you into interpreting data and drawing conclusions.
Once you've drawn a graph of your data, what does it tell you? 'Correlation' is the term that suggests that there might be a link between the two variables that are being investigated.Â
The gradient of a line describes how steep it it. In Science, the gradient is often used to calculate the rate of a chemical reaction (how fast it is happening).