I AM HAFIZ MUHAMMAD WASEEM from mailsi vehari BSc from science college Multan MSC university of education Lahore i love Pakistan and my teachers

1. HAFIZ
MUHAMM
AD
WASEEM
BA BA G
LAHORE

2. Standard System for
Weight, Length and Volume
(Part. 1)
Lecture 5
UNIVESITY OF EDUCATION
LAHORE PAKISTAN

3. Metric units of mass
• Mass is a measurement of the amount of matter
in an object.
• Basic unit of mass is gram (g).
• Weight and mass are related, but NOT the same.
• Weight is the pull of gravity on an object
• The greater the mass, the larger the pull of
gravity.

4. • Mass is used to measure the weight of an object.
• For example, you are measuring the mass of
your body when you step on to a scale.
• In the metric system of measurement, the most
common units of mass are the
• gram (g) and kilogram (Kg).

5. mass
milligram
gram
kilogram
tonne
mg
g
kg
t
1000mg = 1g
1000g = 1kg
1000kg = 1t
Quantity Name of unit
Sym
bol
Value

6. Converting kilograms to grams
• Let's convert 2.8 kg to
grams.
1kg = 1000g
2.8kg = 2.8 ×
1000
= 2800g
• kilogram is the larger
unit than the gram, so
to convert larger unit
to a smaller unit, we
multiply by the factor.
1kg = 1000g, we
multiply by 1000.

7. Converting grams to milligrams
• Let's convert 3.5 g to
milligrams.
1g = 1000mg
3.5g = 3.5 ×
1000
= 3500mg
• gram is the larger unit
than the milligram, so
to convert larger unit
to a smaller unit, we
multiply by the factor.
1g = 1000mg, we
multiply by 1000.

8. Converting milligrams to
micrograms
• Let's convert 1.5 mg to
micrograms.
1 mg = 1000µg
1.5mg = 1.5 ×
1000
= 1500µg
• milligram is the larger
unit than the
microgram, so to
convert larger unit to a
smaller unit, we
multiply by the factor.
1mg = 1000µg, we
multiply by 1000.

9. Converting micro grams to
milligrams
• smaller units to larger
units you divide (÷)
when dividing by 1000
you move the decimal
point in 450.0, three
places to the left.
• 450µg to milligrams
1000 µg = 1mg
450 µg = 450 ÷
1000
= 0.450mg

10. Converting milligrams to
grams
• smaller units to larger
units you divide (÷).
• when dividing by 1000
you move the decimal
point in 250.0, three
places to the left.
• 250 mg to grams
1000 mg = 1g
250 mg = 250 ÷
1000
= 0.250g

11. Metric units of length
• In the metric system of measurement, the
most common units of length are
millimeters (mm), centimeters (cm),
meters (m), and kilometers (Km).

12. How big are metric units of
distance?
• A paper clip is about 1 millimeter thick.
• A fingernail is about 1 centimeter wide.
• The length of a guitar is about 1 meter.
• A kilometer is equal to 1000meters.
•

13. Summary of metric units of
distance

14. Converting larger units to
smaller units
• 1 centimeter (cm)=10 millimeters (mm)
• 1 meter (m)=100 centimeters (cm)
1 meter (m)=1,000 millimeters (mm)
1 kilometer (Km)=1,000 meters (m)
• To convert larger units to smaller units we multiply
the number of larger units by the conversion factor
for the appropriate smaller units.

15. Example
• Let's convert 11m to
centimeters.
1m = 100cm
11m = 11 x 100
= 1100 cm
• meter (m) is a larger
unit than Centimeter
(cm) , so to convert
larger unit to a
smaller unit we
multiply.
• 1m = 100cm , we
multiply by 100.

16. Example
• Let's convert 2Km to
meters.
1 Km = 1000 m
2Km = 2 x 1000
= 2000 m
• Kilometer (Km) is a
larger unit than
meter (m) , so to
convert larger unit to
a smaller unit we
multiply.
• 1Km = 1000m , we
multiply by 1000.

17. Converting smaller units to
larger units
• 1 millimeter (mm)=1/10 centimeter (cm)
• 1 centimeter (cm) =1/100 meter (m)
• 1 meter (m)=1/1,000 kilometer (Km)
• To convert smaller units to larger units we divide
the number of smaller units by the conversion
factor for the appropriate larger units.

18. Example
• Let's convert 250cm
to meters.
100cm = 1m
250cm = 250 ÷
100
= 2.5m
• Centimeter (cm) is
the smaller unit than
the meter, so to
convert smaller unit
to a larger unit we
divide. 100cm = 1m ,
we divide by 100.

19. Example
• Let's convert 750m to
Kilo meters.
1000m = 1Km
750m = 750 ÷
1000
= 0.750Km
• meter (m) is the
smaller unit than the
Kilo meter, so to
convert smaller unit
to a larger unit we
divide. 1000m = 1Km
, we divide by 1000.

20. Metric units of volume
• Volume measures capacity.
• For example, the volume of a bowl is the amount
of space inside the bowl or how much water, for
example it would take to fill the bowl.
• In the metric system of measurement, the most
common units of volume are milliliters (ml) and
liters (L).

21. Example
• Let's convert 2L to
milliliters.
1 L = 1000 ml
2 L = 2 x1000
= 2000 ml
• Liter (L) is the larger
unit than the
milliliter, so to
convert larger unit to
a smaller unit we
multiply.
• 1L = 1000 ml , we
multiply by 1000.

22. Converting liters to milliliters
• 1 liter=1000 milliliters
• To convert liters to milliliters we multiply the number of liters
by 1,000
• Example:
• 8 liters=8×1000=8000 milliliters

23. Converting milliliters to liters
• 1 milliliter=1/1000 liter
• To convert milliliters to liters we divide the
number of milliliters by 1,000
• Example:
• 45 mL=45/1000=45÷1000=0.045 L

24. volume
cubic millimetres
cubic centimetres
cubic metres
mm3
cm3
m3
1cm3= 1000mm3
1m3= 1000cm3
1m3= 1000,000
capacity
(volume of
fluids)
millilitre
litre
kilolitre
mL
L
kL
1000ml = 1 L
1000L = 1kL
Quantity Name of unit Symbol Value
Quantity7 Name of unit Symbol Value