Use Of Exponents To Express Small Numbers In Standard Form
Chapter Name : Exponent And Powers |
Sub Topic Code : 104_08_12_04_01 |
Topic Name : Use Of Exponents To Express Small Numbers In Standard Form |
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Sub Topic Name : Use Of Exponent To Express Small Numbers In Standard Form |
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Introduction
The distance of sun from earth is 149,600,000,000 m., The average diameter of Red Blood Cell is 0.000007 mm.
Pre-Requisites:
Exponents basics & applications of exponents
Activity:
Very small numbers may be expressed in the form of fractions & simultaneously in the form of exponents with negative powers
Real Life Question:
Large numbers can be expressed in simplified form with the help of exponents
Key Words / FlashCards
| Key Words | Definitions (pref. in our own words) |
|---|---|
| 150,000,000,000 | 15 x 1010 |
| 0.000007 | 7 x 10-6 |
Learning aids / Gadgets
| Gadgets | How it can be used |
|---|---|
| Notepad | Practice writing such large & very small numbers in the form of exponents |
Real life uses :
Measurement is very important in the scientific world. For instance, while preparing the CPU, one must know how exactly to fit in a computer chip through a wire whose size is 0.000003 m or 3 x 10-5 m.
Practical examples around us
| Examples | Explainations |
|---|---|
| To measure the size of plant cell | When scientists conduct experiments on variety of plant species, they need to make measurements of small size. These use negative exponents |
What you learn in Theory:
How to write standard large or small numbers in scientific/exponential notation
What you learn in Practice:
Expression in the form of exponential notation is simpler for calculations & comparisons