You will have a
rough idea of what you want to do, but will need to 'tweak' your idea
by trying things out practically. You therefore sketch out a rough experiemental
procedure and test out the best way to do it in a preliminary session.
may want to:
- choose materials
to work with: check that you will get a big enough range of readings
with the ones you have chosen to investigate.
- find out if
you are controlling the other variables well enough to have a 'fair
test'.... maybe you will spot some you hadn't thought of!
- practise using
the equipment, and see if you need to make adjustments to avoid
or minimise errors.... or make it safer!
- spot dangers
in your procedure that you ought to avoid.
check with a teacher before you carry out preliminary experiments -
they have more experience at spotting potential dangers than you do!!
What you find out
from your preliminary readings will influence your final design of your
Remember to say
in your report if you found out a better way to do it from preliminary
work.... and how you checked your ideas were sound before proceeding.