This document provides information about a chemistry lesson on scientific notation for expressing very large and very small numbers. The objectives are to express numbers using scientific notation and understand its importance. Students will be given data or articles containing large or small numbers and asked to rewrite them in scientific notation. They will learn that scientific notation positions the decimal point and uses exponents to write numbers in a more compact way than standard form. An activity is described where students will jump left or right and wiggle their fingers to represent positive and negative exponents when rewriting numbers in scientific notation.

1. GENERAL CHEMISTRY FOR TEACHERS
SE 251
Submitted by:
LEILANI P. PAPA
Submitted to:
PROF JANET T. COMODA
(Demonstration Topic)

2. Measurements
 Give the importance of measurement
 Is there a need to follow standards in measurements?
 Fundamental Quantities?

3. Objectives :
Express very large or very small numbers using the
scientific notation
Determine the importance of using scientific
notation

4. Activity
Each group will be given a selection/article/data
Read the articles/data
You are task to copy the figures given in the articles/data
written in large number or smaller number
How do you find the given figures/number?
Do you know how to write these figures/number in other
way?

5. Scientific notation is used to write
very large or very small numbers
using less digits.

8. Scientific Notation

14. Scientific Notation was developed in
order to easily represent numbers that
are either very large or very small.

15. This is one reason astronomers and
other scientists use scientific notation when
working with very large or very small
numbers. Scientific notation is a system for
writing and working with numbers that makes it
much easier to deal with numbers that are very
small or very large.

16. Jump and Wiggle
Express the given figures to scientific notation.
Identify the exponent as to negative or positive.
Jump to the left when the exponent is positive, then wiggle it
to the number of exponent to be expressed.
Jump to the right when the exponent is negative, then wiggle
it to the number of exponent to be expressed.

17. Let’s begin
1Km = 1 000 00m
1Cm = 0.01m
Proton = 0.0000000000000000000000016727g
Earth’s volume = 260 000 000 000cu mi
1mm = 0.001m

19. 1) 0.000006
2) 5400000
3) 60
4) 0.009
5) 6.7
6) 0.0000002
7) 2000000
8) 71 × 103
Express the following in
scientific notation
Write each number in
standard notation.
9) 0.9 × 10−1
10) 2 × 10−1