How can you protect against substances that are damaging to skin?
Handle with care
How can you be safe when working around substances that are toxic?
Do not eat or drink anything in the lab
How do we calculate an average from a list of numbers?
Add the numbers together.
Divide them by how many numbers there are.
e.g. 1 + 2 + 3 = 6
6 divideded by 3 = 2
Why do we repeat observations when doing an experiment?
To make our results more reliable and accurate
Why do we calculate an average result when doing an experiment?
To make the result more accurate