Working scientifically Flashcards
Evidence needs to be…
Repeatable, Reproducable and Valid.
What does CHIMED stand for?
CHange - Independent.
MEasured - Dependant.
What does accurate mean?
Data that’s close to the true answer.
What does precise mean?
Data is all close to the average.
What is an example of a random error?
A human mistake in measuring.
What is an example of a systematic error?
Measuring from the wrong point on a ruler every time.
What is a zero error?
Using equipment that isn’t zeroed properly.
How do we reduce random errors?
Repeat the experiment to find a mean.
What are the standard units for
- mass,
- length and
- time in biology?
kg, m, s.
What are the 3 possible reasons for a correlation?
- Chance.
- Linked by a 3rd variable.
- Cause.
What is the equation for uncertainty?
uncertainty = range/2
What are the 4 questions asked to evaluate an investigation?
- Was the method valid & fair?
- Could we draw a conclusion?
- Was it repeatable, reproducable, accurate and precise?
- Were there anomalous results?
