Unit 2: Measurements and Dimensional Analysis

Definitions

100

Definition of Precision?

Refers to how close a series of measurements are to one another.

200

Definition of Derived Units?

Unit in a system of measurement that is defined by combining base units.

300

Definition of Percent Error?

How close your measure value is to the accepted value

400

Definition of Density?

Ratio of Mass to Volume

500

Definition of Conversion Factor?

Ratio of equivalent values used to express the same quantity in different units.

Base Units/Unit Prefixes

100

Milli-

1/1000 or 0.001

200

SI base unit for length?

Meters, m

300

What is Kelvin, K, an SI base unit for?

Temperature

400

What is the SI unit for mass?

Kilogram, Kg

500

Micro-

1/1,000,000 or 0.000001

Sig Figs

100

3596

4

200

2.000

4

300

6000400

5

400

523.00

5

500

52 Students

Infinite

Calculations

100

50 km to meters

50000

200

25 miles to feet

(1 mile = 5280 feet)

132000 feet

300

13.6 x 3.3

(Proper Sig Figs)

45

400

36.259 - 21.2

(Proper Sig Figs)

15.1

500

What is the scientific notation of 789000000?

7.89 x 10⁸