Week 1 - Significant digits

Question 1

Explain measure

Answer 1

• Ascertain the size, amount, or degree of something by using an instrument or device marked in standard units
• The quality of the measurements depends on the used device and the experience of the person taking the measurement

***the measured value will always deviated from the true value ( air bubbles; sticky substances etc )

Question 2

What are measurements

Answer 2

Estimates of the true value

Question 3

Explain uncertainty

Answer 3

• Range of values that includes the true value of
  the measurement

Question 4

Explain accuracy

Answer 4

How close is the measured value to a standard or known value

***The accuracy of a device can be verified by using a standard

Question 5

Explain precision

Answer 5

How repeatable or how close together are the results