What is the difference between accuracy and precision? ;
Accuracy = how close a measurement is to the true or accepted value
Precision = how close repeated measurements are to each other
What needs to be included in an accurate and precise measurement?
Correct value (accuracy)
Consistent results (precision)
Units (like g, cm, mL)
Proper measuring tool (like a ruler, balance, etc.)
Estimated digit (one extra decimal place from the tool)
What is the purpose of using scientific notation?
Write very large or very small numbers easily
Make calculations simpler
Avoid mistakes with lots of zeros
👉 Example:
300,000 = 3.0×10^5
What is the purpose of using significant figures when doing calculations?
Prevent over-accuracy in answers
Show how precise a measurement is
What is the density equation?
D = m ÷ V
What is the volume equation (rectangular solid)?
V = l × w × h
What is the mass equation?
m = D × V
