How heavy is it?

1
"How heavy is it?"
http//www.coe.uh.edu/archive/science/science_less
ons/scienceles3/
2
History
The Babylonians' unit of weight was the ka and
the gur. The gur equaled to about 80 gallons.
These were the earliest known units given for
weight. The Hebrews' units were the bat, log,
and the hin. Like the customary system, the
Hebrews had units to measure both dry and wet
substances. Inherited by Medieval Europe, the
Roman system developed the pinte to measure
liquid and the quart to measure dry
substances. The US still used "Queen Anne's
gallon," which was discarded from the British in
1824 until they later adopted the bushel. The
bushel was also derived by the British and was
called,"Winchester bushel." The relationship
between these two units (the gallon and the
bushel) are almost equivalent.
3
Units of Weight
The common units for measuring weight in the
customary system are ounces, pounds, and
tons.   A serving of dry cereal weighs about one
ounce. A loaf of bread is about a pound. A
compact car weighs about a ton.   From smallest
to greatest they range
Ounces Pound Ton
4
Reading a Scale
Scales at the grocery stores show weight in
pounds and fractions of a pound which include
halves, fourths, eighths, and sixteenths. Reading
a scale marked with pounds and fractions of a
pound is similar to reading a ruler. The only
difference is that a scale has the geometric
shape of a circle. When reading the scale, find
the nearest whole pound before the arrow shown on
the scale. Then find the fraction of a pound that
the arrow is pointing to. The total amount is
read as a fraction if it is under a pound,
exactly a pound, or a mixed fraction if it is
over a pound.
5
A shows 9/16 pound. D shows 2 1/2 pounds.
B shows 1 pound. E shows 3 1/16 pounds.
C shows 1 3/4 pounds. F shows 3 5/8 pounds.
6
Conversion Chart
MEASURES OF WEIGHT
1 pound (lb.) 16 ounces (oz.)
1 ton (T.) 2,000 pounds (lb.)
When converting any unit of measurements if you
want To change to a larger unit, divide. To
change to a smaller unit, multiply.
7
Drill and Practice
1. The weight of a hamburger is 4
ounces 4 pounds 2. The weight of a golfball
is 4 ounces 4 pounds 3. The weight of a
truckload of steel is 7 pounds 7
tons 4. The weight of a ambulance is 4,000
pounds 4,000 tons 5. The weight of a bag of
potatoes is 5 ounces 5 pounds
8
(No Transcript)