DO NOW Making Measurements lab is due Monday. Turn in Paper Clip lab.

SCIENTIFIC NOTATION Scientific notation is a way of writing numbers that makes it easy to handle very large or very small numbers. Imagine having to write out Avogadro’s Number – 6.02 x 1023! 602,211,220,000,000,000,000,000

SCIENTIFIC NOTATION To Scientific Notation If the number is less than one, move the decimal to the right. The exponent is negative and equals the number of places you moved the decimal point. 0.00004567  4.567 x 10-5 If the number is greater than one, move the decimal to the left. The exponent is positive. 1234  1.234 x 103

SCIENTIFIC NOTATION From Scientific Notation If the exponent is negative, move the decimal point to the left. The number is less than one. 4.567 x 10-5  .00004567 If the exponent is positive, move the decimal point to the right. The number is greater than one. 1.234 x 103  1234

PRACTICE Express in scientific notation. Assume three significant figures in each. 1. 315 2. 25.2 3. 86,500 4. 0.00512 5. 0.162 6. 0.000724

PRACTICE Express the following numbers as ordinary numbers

FOR NOW Work on Making Measurements lab – due Monday. Work on Vocabulary List for Chapter One. Quiz over Vocabulary words is WEDNESDAY (August 16). Quiz MONDAY over Metric Conversions and Scientific Notation.