Aim: Why do we use Scientific notation in Science? Do Now: - In your notebooks, explain why scientists use scientific notation to represent numbers they calculate rather then writing out the entire number.

Scientific notation is used to write numbers in a short-hand form. This technique makes really large or really small numbers easier to read and write. Ex: 9,600,000 = 9.6 x = 4.9 x 10 -4

Rules for writing in Scientific Notation Step 1 Position the decimal point to get a number between 1 and 10 Step 2 Count the number of places the decimal point was moved to get the number between 1 and 10. Where did it start originally? Step 3 Write the number as a product between 1 and 10 to a power of 10 using the number of spaces the decimal moved as your exponent = 9.6 x 10 6

Closure: - Take a “Writing numbers in Scientific Notation” worksheet from the back. Working with the person sitting next to you, work on the practice problems on the front of the worksheet.

10) 6.57x ) 5.45x )2.245x ) 8.03x ) 6.783x ) 3.47x ) 1.2x ) 5.7x ) ) ) ) ).06523) ).14 25) ) ) )4.6x ) 4.605X10 6 3) 3.3X10 4 4) 9.632X10 3 5) 8.0X ) 3.0X ) 1.458X10 6 8)1.4X ) 5.7X10 3