Chemical Measurements (OCR GCSE Chemistry A (Gateway Science Suite)): Flashcards
📚Flashcards
Practise the cards
9 cards from this deck
ShowHide
Practise the cards
9 cards from this deck
What's always present in measurements?
What's always present in measurements?
Uncertainty
What does instrument precision affect?
What does instrument precision affect?
Measurement accuracy
Why are precise instruments more accurate?
Why are precise instruments more accurate?
They have smaller units of measurement
More precise instruments are...
More precise instruments are...
More accurate
How to reduce uncertainty?
How to reduce uncertainty?
Take multiple measurements and calculate average
Why calculate average of measurements?
Why calculate average of measurements?
To reduce uncertainty and get accurate result
Purpose of averaging measurements
Purpose of averaging measurements
Get more accurate result by balancing out errors
What does averaging balance out?
What does averaging balance out?
Small errors in individual measurements
Uncertainty in 100 cm³ measurement
Uncertainty in 100 cm³ measurement
Could be 99.5 cm³ to 100.5 cm³