TỔNG ÔN TẬP THI VÀO LỚP 10 MÔN TIẾNG ANH NĂM HỌC 2023 - 2024 CÓ ĐÁP ÁN (NGỮ Â...
The metricsystem
1.
Must have a standard.
A standard is an exact quantity people agree to use
for comparison.
A standard means two people using the same object
should get close to the same results.
Measurement
2. Standards of the past
People used to use
parts of their body to
determine the length
of something.
The standard would
be a part of the king’s
anatomy.
The standard yard
was the distance from
the king’s nose to his
outstretched arm
3. People would use their feet to measure
distance
This is how the term
foot came about.
Today the standard
“foot” in the English
system is
12 inches = 1 foot
4. The English system is very confusing
because it has so many different values
5.
America is the only country that still
uses the old English system
6.
Scientists give the English system the
thumbs down
Scientists needed an exact and uniform system of weights
and measurements
7.
How did the metric system come
about?
During the18th century
scientists measured the
distance from the
earth’s equator to its
North Pole and divided
it into ten million parts.
This is how they came
up with the length of
the standard meter.
8.
The Meter
The standard for the meter is kept in a safe in France.
The meter stick is a replica of that standard
A meter is made up of 100 centimeters and 1000
millimeters
9.
Scientists needed a way to measure liquids so they
took 10 cm and multiplied it by its length x width x
height to come up with a standard for measuring
volume
The liter is the size of 10 cm(3)
10cm x 10 cm x 10 cm
Length x Width x Height = Volume
The liter is used to measure liquids
How the liter came
about
10.
How the Gram came
about
Scientists needed a
standard to measure
mass.
Mass is the amount of
matter in an object
They decided to take
one cubic centimeter of
water and call it a gram
11. The time standard
During the 15th
century a scientist
named Galileo set the
standard of time
known as the second
12.
The Mistake
Two different groups of
scientists were working
on the calculations to
send a probe to Mars.
The American team did
their calculations in the
English standard and the
other team did it in the
metric system (OOPS!)
MARS
14.
Kilo means thousand (1000)
Hecto means hundred (100)
Deca means ten (10)
Deci means one-tenth (1/10)
Centi means one-hundredth (1/100)
Milli means one-thousandth (1/1000)
Metric chart
15.
The Meter- Measures length
Length is the distance between two points
The Liter –Measures Volume
Volume is how much space a liquid takes up
The Gram- Measures mass
Mass is how much matter is in an object
Copy This Down
16.
How to use the metric chart
Rewrite the problem
Check for the decimal (if no decimal, put at end)
Where do we start? Put pencil their
Were do we go to?
# of hopes and direction
Do the same with decimals
Metric chart
17. kilo hecto deca UNIT deci centi milli
(meter, gram or liter)
How the metric system
works
•100cm = ___ m100cm = ___ m
•100cm = 1.0 m100cm = 1.0 m
•6.9mm = ___cm6.9mm = ___cm
•6.9mm = .69 cm6.9mm = .69 cm
