MJ2 Ch 1.9 – Scientific Notation & Quiz #2

Bellwork Please take out your assignment from yesterday and leave it on your desk for me to check.Please take out your assignment from yesterday and leave it on your desk for me to check. Convert the measurements:Convert the measurements: cm = _______m 2.52L = _______kL 3.2,500 mg = _______g

Assignment Review Workbook p. 37Workbook p. 37

Objective 1.Students will demonstrate understanding of converting metric measurement 2.Students will write numbers in scientific and standard form

Quiz Please take out a sheet of paper, pencil, and your calculator and text book…then clear your deskPlease take out a sheet of paper, pencil, and your calculator and text book…then clear your desk In the upper right hand corner of your paper write your name, today's date/period & Quiz #2 (No heading & No pencil will result in a 1 letter grade deduction EACH for this quiz)In the upper right hand corner of your paper write your name, today's date/period & Quiz #2 (No heading & No pencil will result in a 1 letter grade deduction EACH for this quiz) Today you will have a quiz on converting metric measurement.Today you will have a quiz on converting metric measurement.

Quiz 5 questions = 20 points each5 questions = 20 points each You may use the FCAT conversion chart at the back of your text bookYou may use the FCAT conversion chart at the back of your text book Number each problemNumber each problem You do not have to write the questionYou do not have to write the question Circle your answerCircle your answer Show all work (No work = No credit)Show all work (No work = No credit)

Quiz 1.Each morning Carlos runs 1.5 kilometers. How many meters did he run? 2.A soda can contains 355 milliliters of liquid. How many liters of liquid does it contain? 3.For 11 – 14 year olds, the recommended Dietary Allowance (RDA) for protein is about 60 grams. How many milligrams do they need daily? 4.A helicopter was flying 800 meters above the ground. How many kilometers above the ground was it flying? 5.A water sprinkler sprays about 150 liters of water each hour. How many kiloliters of water does it spray?

Quiz Answers 1.1,500 m L 3.60,000 mg km kL

After the Quiz… Please pass your answer sheets forward…Please pass your answer sheets forward… Then take out your notebook and get ready to work…Then take out your notebook and get ready to work… Today we will look at numbers in scientific notation and standard form…Today we will look at numbers in scientific notation and standard form… Raise your hand if you can explain why we need to know how to do this….Raise your hand if you can explain why we need to know how to do this….

Objective Students will express numbers in scientific notationStudents will express numbers in scientific notation

CONVERTING FROM SCIENTIFIC NOTATION TO STANDARD FORM

Positive Exponents Positive Exponent – If the scientific notation has a positive exponent move the decimal the # of spaces of the exponent to the RIGHTPositive Exponent – If the scientific notation has a positive exponent move the decimal the # of spaces of the exponent to the RIGHT Example: 5.34 x 10 4Example: 5.34 x 10 4 Starting at the decimal point move it 4 spaces to the RIGHT = 53,400

Negative Exponents Negative Exponent – If the scientific notation has a negative exponent, move the decimal the # of spaces of the exponent to the LEFTNegative Exponent – If the scientific notation has a negative exponent, move the decimal the # of spaces of the exponent to the LEFT Example: 3.27 x 10 -3Example: 3.27 x Starting at the decimal point move it 4 spaces to the LEFT =.00327

Your Turn In the notes section of your notebook write and complete the following problems.In the notes section of your notebook write and complete the following problems.  6.7 x 10 3  x 10 8  x  x 10 -4

CONVERTING FROM STANDARD FORM TO SCIENTIFIC NOTATION

Scientific Notation A number is expressed in scientific notation when it is written as the product of a factor and a power of 10. The factor must be greater than or equal to 1 and less then 10A number is expressed in scientific notation when it is written as the product of a factor and a power of 10. The factor must be greater than or equal to 1 and less then 10 Lets look at an examples with positive and negative exponents…Lets look at an examples with positive and negative exponents…

Positive Exponent 3,725, Place a decimal point between 3 & 7 2.Count the number digits from the decimal to the end of the number going right 3. Drop all zeros in the number and write as a power of 10 3,725,000 = x 10 6

Negative Exponent Place the decimal between the 3 & 1 3. Count the number of digits from the original decimal to the new decimal place 4. Restate the number as a power of = 3.16 x If the standard form number is less than 1 you will have a negative exponent.

Your Turn In the notes section of your notebook write and covert the following to scientific notationIn the notes section of your notebook write and covert the following to scientific notation 1.43, ,300,

Summary In the notes section of your notebook summarize key concepts covered in today’s lessonIn the notes section of your notebook summarize key concepts covered in today’s lesson Today we discussed:Today we discussed: Converting from scientific notation to standard formConverting from scientific notation to standard form Converting from standard form to scientific notationConverting from standard form to scientific notation

Assignment Text p. 45 # 10 – 36Text p. 45 # 10 – 36Reminder I do not accept answers only!I do not accept answers only! You must write the problem & answerYou must write the problem & answer Check the answers to the odd problems with the answers in the back of the text book.Check the answers to the odd problems with the answers in the back of the text book.