1. Bellringer
Enough plastic is thrown away each day to go from the east coast to the west coast (and back!). How many plastic water bottles does this equal?

2. Ms. Hanlon’s Science Classes
Scientific Notation
Ms. Hanlon’s
Science Classes

3. Objectives Demonstrate an ability to use scientific notation.
Be able to perform arithmetic operations using scientific notation.

4. Working with Large/Small Numbers
The mass of the earth is approximately
6,000,000,000,000,000,000,000,000 kilograms
The mass of an electron is
kilograms

5. Scientific Notation to the Rescue
The mass of the earth is approximately
6 x 1027
The mass of an electron is
9.11 x 10-30

7. Solving Equations in Scientific Notation
+/- like exponents
4 x x 108 = 7 x 108
+/- unlike exponents, first move decimal to make both alike
4 x x 105 =
4 x x 106 = 4.3 x 106

8. Solving Equations in Scientific Notation
Multiplication: multiply the numbers, then add the exponents
(3 x 106)(2 x 103) = 6 x 109
Division: divide the numbers, then subtract the exponents
8 x 106 ÷ 2 x 103 = 4 x 103

9. Caution! UNITS MUST BE THE SAME!!!!! 4.1 m + 1.5468 km =
4.1 m m = m

10. Class Activity Work in assigned pairs.
Complete each card set as instructed.
When finished each card set, raise hand for me to check to see if it is correct before proceeding to next card set.

11. Homework
Complete the assigned worksheet.