Metric System and Measurement

What are the most common metric prefixes and order them from smallest to biggest?

• Kilo, centi, milli, micro

• Micro, milli, centi, kilo

• Milli, micro, centi, kilo

• Kilo, centi, micro, milli

What are the SI base units and what do they measure?

• Second (time), kilogram (mass), meter (length)

• Meter (length), kilogram (mass), second (time)

• Kelvin (temperature), ampere (electric current), mole (amount of substance)

• Kilogram (mass), second (time), ampere (electric current)

Define density.

• The amount of matter in an object

• The mass of an object per unit volume

• The weight of an object

• The volume of an object

Be able to convert between metric measurements.

• True

• False

What does it mean to be precise?

• Being close to the true value

• Being consistent in repeated measurements

• Being accurate

• Having a large margin of error

What does it mean to be accurate?

• Being close to the true value

• Being consistent in repeated measurements

• Being precise

• Having a small margin of error

What is the difference between being precise and accurate?

• Precision refers to consistency, accuracy refers to closeness to the true value.

• Precision and accuracy are the same.

• Precision refers to closeness to the true value, accuracy refers to consistency.

• Neither precision nor accuracy matter in measurements.

How many significant figures are there in: 0.023050

• 4

• 5

• 3

• 2

What is the mass and charge of each subatomic particle?

• Proton: ~1 amu, +1 charge; Neutron: ~1 amu, no charge; Electron: ~0 amu, -1 charge

• Proton: ~1 amu, -1 charge; Neutron: ~1 amu, no charge; Electron: ~0 amu, +1 charge

• Proton: ~0 amu, +1 charge; Neutron: ~0 amu, no charge; Electron: ~1 amu, -1 charge

• Proton: ~1 amu, +1 charge; Neutron: ~1 amu, +1 charge; Electron: ~0 amu, -1 charge

In a neutral atom, what is the relationship between protons and electrons?

• The number of protons is greater than the number of electrons.

• The number of protons is equal to the number of electrons.

• The number of protons is less than the number of electrons.

• The relationship varies depending on the element.