i. measurements a. all measurements must have two parts 1. a number 2. a unit ex: 150 mass time gram...

I. MEASUREMENTS A. ALL MEASUREMENTS MUST HAVE TWO PARTS 1. A NUMBER 2. A UNIT EX: 1 50 mass time gram seconds – TELLS HOW MUCH IS BEING MEASURED – TELLS WHAT IS BEING MEASURED

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I. MEASUREMENTS

A. ALL MEASUREMENTS MUST HAVE TWO PARTS

1. A NUMBER

2. A UNIT

EX: 1 50

mass time

gram seconds

– TELLS HOW MUCH IS BEING MEASURED

– TELLS WHAT IS BEING MEASURED

A. Base Units – a unit based on an object or

event in the physical world.

B. Derived units – unit defined from a

combination of several base units

ex: Density = mass / volume

units: g / L

Page 3: I. MEASUREMENTS A. ALL MEASUREMENTS MUST HAVE TWO PARTS 1. A NUMBER 2. A UNIT EX: 150 mass time gram seconds – TELLS HOW MUCH IS BEING MEASURED – TELLS

Distance- the measure between two points

Unit = meter (m)

A B

C D

Instrument = ruler, meter stick, measuring tape

longer distance

shorter distance

Page 4: I. MEASUREMENTS A. ALL MEASUREMENTS MUST HAVE TWO PARTS 1. A NUMBER 2. A UNIT EX: 150 mass time gram seconds – TELLS HOW MUCH IS BEING MEASURED – TELLS

Time- the measure of the interval between two events

Unit = seconds (sec)

Instrument- watch, stopwatch

Page 5: I. MEASUREMENTS A. ALL MEASUREMENTS MUST HAVE TWO PARTS 1. A NUMBER 2. A UNIT EX: 150 mass time gram seconds – TELLS HOW MUCH IS BEING MEASURED – TELLS

Mass- the measure of the amount of material in an object

Unit = gram (g)

more mass

less mass

Instrument- balance

Page 6: I. MEASUREMENTS A. ALL MEASUREMENTS MUST HAVE TWO PARTS 1. A NUMBER 2. A UNIT EX: 150 mass time gram seconds – TELLS HOW MUCH IS BEING MEASURED – TELLS

Volume- the amount of space an object occupies

Unit = Liter (L) or

cubic centimeters (cm³) or (cc)

Instrument- graduated cylinder or ruler

Formula: V = l x w x h (cube, rectangular prism)

Page 7: I. MEASUREMENTS A. ALL MEASUREMENTS MUST HAVE TWO PARTS 1. A NUMBER 2. A UNIT EX: 150 mass time gram seconds – TELLS HOW MUCH IS BEING MEASURED – TELLS

Density- the measure of the amount of mass in a given volume

Unit = grams or grams (g/L or g/cm³)

liter cm³

D = mass

volume

Instrument- balance and graduated cylinder

Page 8: I. MEASUREMENTS A. ALL MEASUREMENTS MUST HAVE TWO PARTS 1. A NUMBER 2. A UNIT EX: 150 mass time gram seconds – TELLS HOW MUCH IS BEING MEASURED – TELLS

Temperature- the amount of energy in the particles of a substance

Unit = degrees Celsius (°C) , Fahrenheit (°F), Kelvin (K)

Instrument- thermometer

K = 273 -°C °F = °C(1.8)+32

°C = 273+K °C = °F-32 (1.8)

Page 9: I. MEASUREMENTS A. ALL MEASUREMENTS MUST HAVE TWO PARTS 1. A NUMBER 2. A UNIT EX: 150 mass time gram seconds – TELLS HOW MUCH IS BEING MEASURED – TELLS

Area- the measure of the surface of

an object

Unit = centimeters squared (cm²)Instrument- ruler

A = l x w (square, rectangle)

outside of outside shell balloon of egg

A = r2 (circle)

Page 10: I. MEASUREMENTS A. ALL MEASUREMENTS MUST HAVE TWO PARTS 1. A NUMBER 2. A UNIT EX: 150 mass time gram seconds – TELLS HOW MUCH IS BEING MEASURED – TELLS

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