Objectives:◦ Today I will be able to:

Apply math skills to problem solving. Apply scientific notation to problem solving. Calculate multiplication and division problems using scientific

notation. Informal Assessment – monitoring student interactions

as they complete the scientific notation practice Formal assessment – math assessment/scientific

notation practice and exit ticket Common Core Connection

◦ Make sense of problem and persevere in solving them ◦ Model with mathematics

Evaluate: Warm-Up Evaluate: Review Milk Lab Evaluate: Math assessment Engage/Explain: Scientific Notation Notes/

Activity Elaborate: Scientific Notation Practice Evaluate: Exit Ticket

Complete the STEM Fair 2014-15 half sheet of paper

What observations did you notice when you added the detergent to the whole, 2 percent and skim milk?

Why did the detergent, milk and food coloring interact?

Today I will be able to:◦ Apply math skills to problem solving.◦ Apply scientific notation to problem solving. ◦ Calculate multiplication and division problems

using scientific notation.

Scientific Notation Practice

Warm-Up Review Milk Lab Math Assessment Scientific Notation Activity, Notes, Practice Exit Ticket

Review and explain the milk lab

You have 25 minutes to complete the assessment individually at your desk. You

may not use a calculator

What is scientific notation?

In groups, brainstorm 3 examples of things that scientists/ engineers could study that would be large enough or small enough for scientific notation to be used to describe them

Each group has an envelope containing numbers in scientific notation and standard notation.

Put the numbers in order from smallest to largest on your desk.

A way to write numbers that are too big or too small to conveniently write in decimal notation

Standard scientific notation format

◦6.02 x 1023

Notice there is only one number before the decimal

Standard Notation – numbers that are in decimal form

When given a number in standard notation move the decimal to the left or right until there is only one number before the decimal

The number of spaces moved to the left or right becomes the exponent

The sign on the exponent is ◦ Positive – moved the decimal to the left◦ Negative – moved the decimal to the right

Examples◦ 489000000 (Standard Notation)

Move the decimal to the left, exponent is positive◦ 4.89 x 108 (Scientific Notation)

◦ 0.000123 (Standard Notation) Move the decimal to the right, exponent is negative

◦ 1.23 x 104

Start with number in scientific notation

Look at the sign on the exponent◦ If positive, move the decimal to the right◦ If negative, move the decimal to the left

Use the exponent to tell you how many places to the move the decimal point

Examples

◦ 3.47 x 105 (Scientific Notation) Exponent is positive, move to the right

◦ 347000 (Standard Notation)

◦ 7.82 x 10-4 (Scientific Notation) Exponent is negative, move to the left

◦ 0.000782 (Standard Notation)

Multiply or divide the numbers first ◦ (don’t include x 10exp)

When multiplying, add the exponents together

When dividing, subtract the exponents Make sure there is only one number before the

decimal place in scientific notation. You may have to move the decimal so there is only one

Examples

(2.0 x 105)(7.0 x104)=

◦ 1.4 x 1010

(15.0 x 107) / (3.0 x 109)=

◦ 5.0 x 10-2

Complete the practice at your desk. Whatever you do not finish will become

your homework.

Activity◦ Find your matching partner by finding the correct

standard notation and scientific notation pair

With your partner discuss the following questions:◦ If you could have one special superhero power,

what would it be?◦ Would you rather have Cheetos fingers, or a

popcorn kernel stuck in the back of your throat, for the rest of your life?