1. World 1-5 Scientific Notation

2. When numbers get really ______ or For this reason we use Scientific Notation. really ______ it is inconvenient to write out all of the zeros. Big small

3. eg. 1 Express using scientific notation b) 0.00042 = 4.2 /10000 = 4.2 x 10 -4 10 4 because there are 4 places to the left of the decimal. a)5600 POSITIVE EXPONENT NEGATIVE EXPONENT =5.6 x 1000 =5.6 x 10 3 10 3 because there are There are 3 places to the right of the decimal.

4. http://www.youtube.com/watch?v=_WEL117xXpw&feature=related “Use the video link below to help you complete the table on the following page.”

5. Table 1 - Positive Exponents Planets and Stars. Decimal NotationScientific Notation Earth Jupiter Sun Aldebaran Betelgeuse VV Cephei

6. Solutions Decimal NotationScientific Notation Earth12 756 km1.3 x 10 4 km Jupiter142 984 km1.4 x 10 5 km Sun1 392 000 km1.4 x 10 6 km Aldebaran59 770 000 km6.0 x 10 7 km Betelgeuse903 500 000 km9.0 x 10 8 km VV Cephei2 644 800 000 km2.6 x 10 9 km

7. http://learn.genetics.utah.edu/content/begin/cells/scale/ “Use the interactive link below to help you complete the table on the following page.”

8. Table 2 - Negative Exponents Cells, Viruses and Proteins Decimal NotationScientific Notation Salt Grain0.005 m Skin Cell0.000 03 m Chromosome0.000 007 m HIV Virus0.000 000 130 m Hepatitis B0.000 000 045 m Water Atom0.000 000 000 275 m

9. Solutions Decimal NotationScientific Notation Salt Grain0.005 m5.0 x 10 -3 m Skin Cell0.000 033.0 x 10 -5 m Chromosome0.000 0077.0 x 10 -6 km HIV Virus0.000 000 1301.3 x 10 -7 km Hepatitis B0.000 000 0454.5 x 10 -8 km Water Atom0.000 000 000 2752.8 x 10 -10 km

10. Homework pg. 40 #4-6, 8-9