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DIFFICULTY OF THE IMPERIAL UNITS?. One inch is usually divided into 8, 10 or 16 parts: DIFFICULTY OF THE IMPERIAL UNITS This particular ruler has 16 divisions.

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Presentation on theme: "DIFFICULTY OF THE IMPERIAL UNITS?. One inch is usually divided into 8, 10 or 16 parts: DIFFICULTY OF THE IMPERIAL UNITS This particular ruler has 16 divisions."— Presentation transcript:

1 DIFFICULTY OF THE IMPERIAL UNITS?

2 One inch is usually divided into 8, 10 or 16 parts: DIFFICULTY OF THE IMPERIAL UNITS This particular ruler has 16 divisions

3 One inch is usually divided into 8, 10 or 16 parts: DIFFICULTY OF THE IMPERIAL UNITS So, the smallest division = 1/16 th of an inch

4 One inch is usually divided into 8, 10 or 16 parts: What is the length of the pencil? So, the smallest division = 1/16 th of an inch

5 One inch is usually divided into 8, 10 or 16 parts: What is the length of the pencil?

6 Videoclip

7 1.3 Relating SI and Imperial Units Copyright © 2010 Ryan P. Murphy

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9 Gallon Mph (Miles per hour) Pounds Inches Yards Fahrenheit I will show you these 6 pictures showing you their metric values.

10 One gallon of milk = 3.78 liters of milk

11 65 mph = 104 km/h Copyright © 2010 Ryan P. Murphy

12 Double Quarter Pounder(0.5 pound) = kg

13 48 inches tall = 1.22 meters tall Copyright © 2010 Ryan P. Murphy

14 1 Yards = meters Copyright © 2010 Ryan P. Murphy

15 80 degrees Fahrenheit = 26.7 degrees Celsius Copyright © 2010 Ryan P. Murphy

16 The International System (System Internationale ‘unites) of Units (SI) also known as THE METRIC SYSTEM.

17 It is used by scientists all over the world

18 The Metric System : A measurement system based on the powers of ten. Copyright © 2010 Ryan P. Murphy

19 POWERS OF TEN HAVE PREFIXES Copyright © 2010 Ryan P. Murphy

20 YOU MUST KNOW THEM!!! Copyright © 2010 Ryan P. Murphy

21 The simplicity of the Metric System? Copyright © 2010 Ryan P. Murphy For example: LENGTH: meter MASS: gram VOLUME: liter Only one unit of measurement for each quantity

22 You can measure the very small and the very large with the same unit Copyright © 2010 Ryan P. Murphy

23 The measurements below are all the same. Copyright © 2010 Ryan P. Murphy “I am mm tall.” “I am cm tall.” “I am meters tall.” “I am km tall.” Compare it with Imperial System

24 The simplicity of the Metric System? Copyright © 2010 Ryan P. Murphy SI For example: LENGTH: meter MASS: gram VOLUME: liter Only one unit of measurement for each quantity For example: LENGTH : mile, yard, foot/feet, inch… MASS : grain (≈0.65g), drachm (1.77 g), pound (453 g)… VOLUME : ounce (0.028 L), gill (0.142 L), gallon (4.55 L)… Imperial

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26 a number and unit Any quantity we measure,( length, mass, volume… ) consists of a number and unit If we are given a quantity in one type of unit, and we want another type of unit : We must convert the units We can do this using :We can do this using 2 methods:

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31 A relationships between any quantities can be expressed by CONVERSION FACTORS

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33 EXAMPLE #1 Convert 21.5 inches to cm!

34 conversion factors Step 1: Write conversion factors for inches and cm cancel units Step 2: Choose a conversion factor which will allow you to cancel units of a given quantity ( inches in our case) cancel check Step 3: Multiply, cancel and check the units EXAMPLE #1 Convert 21.5 inches to cm!

35 conversion factors Step 1: Write conversion factors for inches and cm Convert 21.5 inches to cm!

36 conversion factors Step 1: Write conversion factors for inches and cm Convert 21.5 inches to cm! cancel units Step 2: Choose a conversion factor which will allow you to cancel units of a given quantity ( inches in our case)

37 Convert 21.5 inches to cm! 21.5 inches x cancel check Step 3: Multiply, cancel and check the units

38 EXAMPLE #1 Convert 21.5 inches to cm!

39 A Canadian football field is approximately 59 m wide. What is this measurement to the nearest foot? Use both of the methods of conversion.

40 Nora knows that she is 5 ft. 7 in. tall. a) What height in centimetres will she list on her driver’s license application? Use both of the methods of conversion.

41 HOMEWORK O Pages : 22 – 23 O Problems : 4 – 14 (all even)

42 Convert 6.32 µm to km 1.Convert to a base unit (need 2 conversion factors) and from the base unit

43 Convert 6.32 µm to km 3. Insert the values for 1 µm and 1 km

44 Convert 6.32 µm to km 4.Cancel the units and do the math


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