Checking for Understanding: Quantities & Units

This type of observation uses your senses to observe results and are usually imprecise:

• Quantitative

• Qualitative

• Definitive

• Formula

This type of observation is made using instruments and is usually precise:

• Selective

• Qualitative

• Quantitative

• Equation

Physical quantities are:

• quantities that can be seen

• quantities that can be created in a laboratory

• quantities that are created by scientists and physicists

• quantities that can be measured

Physical quantities that are chosen and defined in terms of a standard:

• derived quantities

• scalar quantities

• base quantities

• ratio quantities

Physical quantities that are the result of the combination of two or more quantities through multiplication or division or both:

• base quantities

• derived quantities

• scalar quantities

• phasor quantities

Which of the following is a base quantity?

• Force

• Acceleration

• Power

• Temperature

Which of the following is a derived quantity?

• Mass

• Time

• Length

• Density

A system of measurement widely accepted by the scientific community (SI for short):

• Science Instruments

• International System of Units

• English System

• US Customary Units

How many basic units does the SI system have

• 4

• 5

• 7

• 10

Ways to measure quantities:

• numbers

• quantities

• symbols

• units