Measurements

Question 1

Systematic Error

Answer 1

Occurs according to some fixed rule or pattern such that they yield a consistent over-estimation or under-estimation of the true value of the measured quantity.

Question 2

Random Error

Answer 2

Occurs without a fixed pattern such that a set of measurments done under the same conditions have an equally likely chance of being greater or less than the true value.

Question 3

Accuracy

Answer 3

How closely a measured value agrees with the true value.

Question 4

Precision

Answer 4

How closely individual measurements agree with each other without reference to any true value.

Question 5

Base Quantity

Answer 5

Physical quantity that cannot be represented in terms of other physical quantities

Question 6

Examples of Base Quantities

Answer 6

Length, Time, Mass, Temperature, Current, Amount of Substance, Luminous Intensity

Question 7

Examples of Base Units

Answer 7

kilogram (kg), metre (m), ampere (A), second (s), kelvin (K), mole (mol), cad