Chemistry Mid-Term

Question 1

Base units

Answer 1

meters, grams, liters, seconds, etc.

Question 2

Scientific Notation

Answer 2

Must be between 1-10| + exponents = larger #, - exponents = smaller # (ex. 36,000 = 3.6 X 10⁴)

Question 3

Accuracy

Answer 3

How close a measurement is to the correct #

Question 4

Precision

Answer 4

How close measurements are to each other.

Question 5

Percent error

Answer 5

experimental value-actual value/accepted x 100

Question 6

Spread

Answer 6

highest value - lowest value /2

Question 7

Metric system

Answer 7

Based on multiples of 10

Question 8

Kilo(k)

Answer 8

10³

Question 9

hector (h)

Answer 9

10²

Question 10

deca (da)

Answer 10

10¹

Question 11

deci (d)

Answer 11

10^⁻1

Question 12

centi (c)

Answer 12

10^-2

Question 13

milli (m)

Answer 13

10^-3

Question 14

Error

Answer 14

Experimental - Actual —– negative = below actual value, positive = above actual value

Question 15

Density

Answer 15

A ratio of the amount of matter per unit of volume
Mass/Volume= Density

Question 16

Circle graph

Answer 16

used to show parts of a whole

Question 17

Bar graph

Answer 17

To show how a quantity varies across categories

Question 18

Slope

Answer 18

Measure of the steepness of a line