**What is it?**

How to do it!

How to do it!

**Scientific Notation**

Scientific notation is a way that scientists handle very large or very small numbers

For example, instead of writing 0.0000000056g to describe the mass of an eyelash...

we write 5.6 x 10-9.

So, how does this work?

It is all in how we move the decimal

Just remember:

Tiny #s the decimal moves right

Big #s the decimal moves left

For example:

123,000,000,000

is a very large number

We can write this without all the zeros

by using scientific notation

We would need to move the decimal

place to the left because it is

a BIG number

We start by putting our decimal at the end of the number:

123 000 000 000.

Next we will move it left unit we are between the first two numbers

1.23 000 000 000

We need to count how many places we

moved the decimal

In 1.23 000 000 000 we moved it 11 places

Since we moved the decimal left

and it is a BIG number, the

11 (our exponent) will be +

The 11 is a power of 10. So it should be superscript or up above the 10, however Prezi will not let me superscript the numer.

That is why the ^ mark is there.

The very last step is to drop all the zeros and write the remaining number

1.23 x 10^11

The same rules apply for very small

numbers except:

The decimal will be moved to the right

The exponent will be a negative number

For example:

0.000 000 000 075

We would move the decimal to the right

between the 7 and 5

0 000 000 000 07.5

Since we moved the decimal

11 places to the right

and it is a very tiny number...

our exponent will be -

We would right this:

7.5 x 10 ^ -11

When given scientific notation,

just work backwards.

With negative exponents... move the decimal to the left. This will be a very tiny number.

With positive exponents, move

the decimal to the right.

This will be a

large number.

Example:

4.2 x 10 ^ 6 = 4200000

4.2 x 10 ^ -6 = .0000042

In chemistry, you will be adding, subtracting, multiplying, and dividing numbers in scientific notation.

You can either put the number in ''number'' form or plug the notated number into the calcutator.

Lastly... How to use a calculator

*ALWAYS USE PARENTHESIS

How to:

1) Open with a parenthesis (

2) Plug in decimal number 2.4

3) Use the EE button.

(EE is equal to x 10 ^ )

4) Enter the exponent number. Use the +/- button to change its sign if it is a negative number

5) Close parenthesis

HINTS before you try:

The EE button is above the x-1 (above the 7)

You will have to hit the 2nd (x-1) button

ALWAYS USE PARENTHESIS