1) Significant Figures

The significant figure point on the AP test is "always" an add/subtract rule from a lab-based question.

What are the types of scientific numbers?

exact numbers and inexact numbers

Exact numbers and inexact numbers are the types of what?

scientific numbers

What are exact numbers?

Something you can count or published constants

What are either something you can count or published constants?

exact numbers

What are inexact numbers?

measurements

What are measurments known as?

inexact numbers

Inexact measurement must be reported with what?

the correct number of significant figures to indicate the accuracy

What must be reported with the correct number of significant figures to indicate the accuracy?

Inexact measurements

When using a scale for scientific measurements, you _

read the value on the closest line and one decimal guess

You read the value on the closest line and one decimal guess when using a what for scientific measurements?

a scale

What do more lines on the grid lead to?

more decimal places and a more accurate measurement

What leads to more decimal places and a more accurate measurement?

More lines on the grid

Where do you measure liquids?

at the bottom of the meniscus

What do you measure at the bottom of the meniscus?

liquids

For digital devices, record _

ALL decimals

record ALL decimals for what?

digital devices

Only what has significant figures?

measurements

Only measurements have what?

significant figures

Pacific =

decimal is present

decimal is present =

pacific

Atlantic =

decimal is absent

decimal is absent =

atlantic

When the decimal is present,

start from the left and count all numbers from the first nonzero

Start from the left and count all numbers from the first nonzero when

the decimal is present

Start from the right and count all numbers from the first nonzero when

the decimal is absent

When the decimal is absent,

start from the right and count all numbers from the first nonzero

When multiplying or dividing measurements, round the final answer to

the smallest number of significant figures in your measurements

Round the final answer to the smallest number of significant figures in your measurements when

multiplying or dividing measurements