Last modified 13 th April 2015 GCSE Revision Pack Ref 157 158 160 GCSE Specification 157 Convert between units of measure in the same system NB Conversion between imperial units will be ID: 739489
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Slide1
GCSE: Units
Dr J Frost (jfrost@tiffin.kingston.sch.uk)
Last modified:
13
th April 2015
GCSE Revision Pack Ref: 157, 158, 160Slide2
GCSE Specification
157
. Convert between units of measure in the same system. (NB: Conversion between imperial units will be
given, metric equivalents should be known.)
158. Know rough metric equivalents of pounds, feet, miles, pints and gallons: Metric/ImperialConvert between imperial and metric measures160. Convert between metric units of speed
eg
km/h to m/s
(Using revision pack reference numbers)Slide3
Metric
Metric Conversions
1 m = 100 cm
1cm = 10 mm
1 ton = 1000 kg
1 kg = 1000 g
1
= 1000 ml
1
= 1000 cm
3
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Imperial & Metric
Length
Mass
Capacity
Pints
Metric
Imperial
Metres
Miles
Litres
kg
Feet
Inches
Tonnes
Miles
Gallons
Pounds
StoneSlide5
Metric
Imperial Conversions
You need to
memorise
these for your GCSE exam!
1 kg
2.2
pounds
(
means ‘approximately equal to’)
1 litre
1.75
pints
4.5 litres
1
gallon
8 km
5
miles
30cm
1
foot
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5.4kg = 11.88 pounds
49.69 pints = 28.394 litres
40km = 25 miles
75cm = 2.5 foot
Test Your Understanding
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30 miles = 48 km
28km = 17.5 miles
480 miles = 768 km
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Memorise Time!
1 kg
2.2
pounds
1
litre
1.75
pints
4.5 litres
1
gallon
8 km
5
miles
1 foot
30 cm
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?
?
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4.5
litres
1 gallon
1
litre
1.75
pints
8
km
5
miles
1 foot
30 cm
1 kg
2.2
pounds
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30m/s
0.03 km/s
1000
?
108 km/h
×
3600
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Converting between compound units
65m/s
234 km/h
?Slide8
175 m/s
630 km/h
?
Test Your Understanding
45km/h
12.5 m/s
?Slide9
Exercises
The radius of the Earth is 6371km
How many miles is that?
3982 miles
London and Auckland are at exact opposites of the Earth. If I fly at 450mph, how many hours will it take to get there? 27.8 hoursUsain Bolt can run 10.48 m/s. What is that in:
km/h?
37.728 km/h
mph?
23.58 mph
Pippin the cat weighs 9.2 pounds. I want to enter Pippin along with cats of the same weight into Crufts. My total weight limits is 1 ton of cat. How many cats can I take?
239 cats
Convert the following:
650 km/h
180.6 m/s
1
m/s
3.6 km/h
1
2
3
5
6
7
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4
[Edexcel] Emily
is driving in
France. She
sees this sign
.
Emily is going to drive to
Dijon. She
plans to drive at an average speed of 50 miles per
hour. Work
out how long it should take Emily to drive to Dijon.
To experiment to see if cats land on their feet, I release Pippin upside down at the top of a 6000 foot drop. What is that in km?
1.8km
The average human consumes about 7.6 pints of cow’s milk a day. How many litres is that in a year?
1585.1 litres
If my Ferrari consumes 6 gallons of petrol each hour and my Aston 8 gallons each hour, what is the difference in time in seconds, between the two cars, to consume a litre of petrol?
33.3 seconds
6 hours
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