6.9
Compare and convert units of measure for length, area, weight/mass, and volume
within the U.S. Customary system and the metric system and estimate conversions
between units in each system:
a) length — part of an inch (1/2, 1/4, and 1/8), inches, feet, yards, miles,
millimeters, centimeters, meters, and kilometers
b) weight/mass — ounces, pounds, tons, grams, and kilograms
c) liquid volume — cups, pints, quarts, gallons, milliliters, and liters
d) area — square units.
Pg 82
Examples of measurement 6.9
Customary
Metric
Liter
gram
centimeter
6.9 Basics
pg 83
Capacity - A measure of the ability to receive, hold, or
absorb volume.
Length - A measure used as a unit to estimate distances.
Weight - Weight is determined by the pull of gravity on the
mass of an object. The weight of an object
changes dependent on the gravitational pull at its location.
Mass - Mass is the amount of matter in an object. The
mass of an object remains the same regardless of its
location. In everyday life, most people are actually
interested in determining an object’s mass, although they
use the term weight, as shown by the questions: “How
much does it weigh?” versus “What is its mass?”
Volume –The amount of space that a three dimensional
figure contains. Volume is expressed in cubic units, it tells
you the number of cubes of a given size are used to fill the
figure.
Area – The product of the length and the width (A = l  w).
The area of a triangle is one half of the measure of the base
times the height:
A = bh, or A = bh ÷ 2.
Square Unit – Units used when measuring the area of a
two-dimensional figure.
Pg 84
Directions Customary
Length
Inch
Foot-12 inches
Yard- 3 Feet /36 inches
Mile- 1760 yards /5,280 feet
Weight/mass
Ounce (oz)
Pound (lb) 16 ounces
Ton- 2,000 lbs
Capacity
Cup
Pint-2 cups
Quart- 2 pints/4cups
Gallon- 4 qts/8 pts/16 cups
6.9
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6.9
Vocabulary
pg 85
U.S. Customary System –System of measurements using
inch, foot, yard, mile, fluid ounce, cup, pint, quart, gallon,
dry ounce, pound, and ton.
Inch –measurement, about the width of a quarter
Foot –used to measure length, equal to 12 inches.
Yard –3 feet, approximate distance from nose to fingertip
for the average adult
Mile –used to measure distance, equal to 1,760 yards
Ounce (oz) – measurement for liquids or solids; (p. 470)
fluid ounce (fl oz), about 2 tablespoons of water; dry
ounce (oz), about the weight of a pencil
Pound (lb) –used to measure mass, 1 pound = 16 ounces,
1 package of notebook paper
Ton (T) –solid measurement, 1 ton = 2,000 pounds,
average passenger car
Cup (c) –liquid measurement, 1 cup = 8 fluid ounces,
coffee cup
Pint (pt) –liquid measurement, 1 pint = 2 cups, small ice
cream container
Quart (qt) –liquid measurement, 1 quart = 2 pints, small
plastic jug of milk
Gallon (gal) –liquid measurement, 1 gallon = 4 quarts,
large plastic jug of milk
Pg 86
Metric Directions 6.9
King Henry Died Drinking Chocolate Milk
Metric 6.9
pg 87
Metric System –A decimal system of units based on
the meter as a unit length, the gram as a unit mass,
and the liter as a unit of volume.
Meter (m) –basic unit of length in the metric
measurement system, equivalent to 39.37 inches or
just more than 3 feet.
Centimeter (cm) –metric measurement, 2.5
centimeters = to 1 inch, half the width of a penny
Kilometer (km) –metric measurement for distances,
6.2 km = to 1 mile, six city blocks
Millimeter (mm) –length measurement, 25 millimeters
= 1 inch, thickness of a dime
Liter (L) –liquid metric measure, 1 liter = 1 quart, 1
small picture
Milliliter (ml) –liquid metric measurement, 1 milliliter
= 0.03 fl oz, an eyedropper
Gram (g) – metric measurement for solids, a paper clip
Kilogram (kg) –solid metric measure, 1 kilograms = 2
pounds, six medium apples
Milligram (mg) –A metric unit of mass. One Milligram
equals one-thousandth of a gram. A grain of sand