Review Measurement and calculations

Question 1

What does qualitative data mean?

Answer 1

observational data for example color, smell, changes

Question 2

what does quantitative data mean?

Answer 2

numerical data that is measurable

Question 3

what is accuracy?

Answer 3

accuracy is how close a measurement is to the true value

Question 4

what is precision?

Answer 4

how precise a set of measurements are to each other

Question 5

what is a mole?

Answer 5

a mole is a counting unit and it acts as a bridge

Question 6

what is Avogadro’s number?

Answer 6

6.022x 10^23, 1 mole of anything contains avogadros number

mole allows us to relate to the mass of atoms

Question 7

SI units

Answer 7

internationally agreed set of metric units that are used in scientific measurements

Question 8

what does the United States use for measurement?

Answer 8

The english system

Question 9

what does everyone else use for measurement

Answer 9

the metric system

Question 10

what are the SI Units

Answer 10

Mass, length, time, temperature, electric current, amount of a substance

Question 11

what is the unit and symbol for mass

Answer 11

Kilogram and Kg

Question 12

what is the unit and symbol for length?

Answer 12

meter and m

Question 13

what is the unit and symbol for temperature

Answer 13

kelvin and K

Question 14

what is the unit and symbol for electric current?

Answer 14

ampere and A

Question 15

what is the unit and symbol for an amount of a substance?

Answer 15

mole and mol

Question 16

what is giga?

Answer 16

G or 1,000,000,000 or 10^9

Question 17

what is mega? ( think of mega million)

Answer 17

M or 1,000,000 or 10^6

Question 18

what is the unit and symbol for time?

Answer 18

second and s

Question 19

what is kilo?

Answer 19

K or 1000 or 10^3

Question 20

what is hecto?

Answer 20

h or 100 or 10 ^2

Question 21

what is deka?

Answer 21

da or 10 or 10^1

Question 22

what is deci?

Answer 22

d or 0.1 or 10^-1

Question 23

what is centi?

Answer 23

c or 0.01 or 10^2

Question 24

what is mili?

Answer 24

m or 0.001 or 10^-3

Question 25

what is micro?

Answer 25

upside down u or 0.000001 or 10^-6

Question 26

what is nano?

Answer 26

n or 0.000000001 or 10^-9

Question 27

what is volume?

Answer 27

volume is the measure of space

*any cubed unit of length

Question 28

what is exact?

Answer 28

exact values have no uncertainty

Question 29

what is inexact?

Answer 29

inexact values have some amount of uncertainty

Question 30

What are the sig fig rules

Answer 30

1. ) all nonzero numbers are significant
2. ) zeros between nonzero digits
3. ) leading zeros
4. ) trailing zeros
5. ) exact numbers

Question 31

what is the extra rule about trailing zeros?

Answer 31

zeros to the left of the first nonzero digit is not significant

Question 32

what is the special rule about exact numbers concerning sig figs?

Answer 32

exact numbers have an unlimited amount of sigfigs

Question 33

how should you round a number that is above 5

Answer 33

add at least one sig fig

example: 4.16 would round to 4.2

Question 34

how would you round a number that is above 5?

Answer 34

leave at least 1 sig fig unchanged

4.14 would round to 4.1