Uncertainty In Measurement
Chapter Name : Some Basic Concepts Of Chemistry |
Sub Topic Code : 102_11_01_04_02 |
Topic Name : Uncertainty In Measurement |
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Sub Topic Name : Significant Figures |
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Introduction
Every measurement cannot be accurate. To get an accurate figure we tailor it down. These tailored digits are known as significant figures.
Pre-Requisites:
Decimal operation, scientific Notation.
Activity:
Grocer measuring wheat flour on the weighing machine and trying to get closest possible value against the demand of customer.
Real Life Question:
How do you measure number of hair on someone’s scalp to its closest possible value?
Key Words / FlashCards
| Key Words | Definitions (pref. in our own words) |
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| Precision | Closeness of various measurements. |
| Accuracy | Closeness to actual value. |
Learning aids / Gadgets
| Gadgets | How it can be used |
|---|---|
| Thermometer | Measure the temperature of your body and see how close it is to the normal body temperature. |
| Weighting machine | Measure a cup of sugar. |
Real life uses :
Used to determine the approximate closest value.
Places to visit :
Kitchen, laboratory
Practical examples around us
| Examples | Explainations |
|---|
What you learn in Theory:
To find significant figures in a complex set of digits.