Category : 3rd Class
This lesson will help you to:—
REAL LIFE EXAMPLES
QUICK CONCEPT REVIEW
How many types of weighing devices have you seen?
Check out the different types of weighing devices given
Below: They all are weighing scale. They are used for different purposes.
1. A paperclip weighs about 1 gram.
Try weighing a safety pin!
2. You can weight your body weight using weighing machine.
Try to measure your weight!
3. Body builders lift heavy weights every day to maintain their body.
Can you guess the weights they lift?
Look at the object carefully
Choose a unit of weight
Estimate the weight of the object in that unit
Verify the weight using weighing balance
SHORTCUT TO PROBLEM SOLVING
MASS CONVERSION FACTORS
1 centigram (Cg) = 10 milligram (mg)
1 decigram (dg) = 10 centigram (Cg)
1 gram (gm) = 10 dg = 1000 mg
1 dekagram (dag) = 10 gram
1 hectogram (hg) = 10 dekagram
1 kilogram (kg) = 1000 gram
Misconcept: The object which looks bigger in size is heavier than the object which looks smaller in size.
Concept: The size of an object is not linked with its weight.
Misconcept: While using a weighing balance, the reading of the scale start from ‘1’ since the counting of number starts term ‘1’.
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