Experiments Flashcards
Reliable results come from…
experiments that give the same results
Valid results are…
reliable and from a fair test
What improves validity?
controlling variables
What is a variable?
something that can be changed
How can you make an experiment safer?
heat proof mat, tie hair up, gloves, goggles, sensible shoes, lab coat
What are potential hazards?
microorganisms, chemicals, fire, electricity
for accurate results…
measure the right thing, don’t miss anything, don’t include anything not needed
what are precise results
all close to the mean or your repeated results
how do you plan an experiment
- say what youre measuring
- say what youre changing and how
- describe the method and apparatus
- describe variables youre keeping constant and how
- say repeat x10 for reliable results
- say if youre using a control or not
what is a hypotheses
a possible explanation for something observed
what are some ethical issues
are organisms being treated safely
are animals being treated humanely
are they being returned to their natural habitat
what is positive correlation
when one variable increases the other increases too
what is negative correlation
when one variable increases the other decreases
how to write a conclusion?
make sure it matches the data
use results to justify
refer back to hypotheses
what is an evaluation?
analysis of investigation. describe how it can be improved
