Unit 2 Day 2

Unit 2 Day 2

by Jaffa Williams

Clear Target

I can use scientific notation to write very large or very small quantities and convert scientific notation to standard form.

Open Ended

What did we learn yesterday?

Solve & Discuss It!

​Scientists often write very large or very small numbers using exponents. How might a scientist write the number shown using exponents?

​Louisa is researching the approximate distance between Earth and the Sun. In an astronomy book, she found the following. 

Writing Large Numbers in Scientific Notation

The height of Angel Falls, the tallest waterfall in the world is 3, 212 feet. How do you write this number in scientific notation?

Writing Large Numbers in Scientific Notation Y'ALL TRY!

Multiple Choice

Brenna wants an easier way to write 0.0000000000000000587. 

How can she write this number in scientific notation?

• $$587\times10^{17}$$  

• $$5.87\times10^{16}$$  

• $$5.87\times10^{17}$$  

• $$587\times10^{16}$$  

What is the width of a red blood cell written in scientific notation?

Writing Small Numbers in Scientific Notation

A common mechanical pencil lead measures about 0.005 meter in diameter. How can you express this measurement using scientific notation?

Writing Small Numbers in Scientific Notation Y'ALL TRY!

Multiple Choice

Peter says that the Sun is 150,000,000 kilometers from Earth.

How can Peter write the distance from the Sun to Earth in scientific notation?

• $$1.5\times10^8$$  

• $$15\times10^8$$  

• $$1.5\times10^7$$  

• $$15\times10^7$$  

You Practice!

1. ​Go to www.socrative.com

2. ​Room Name is the class name

3. ​Type in your student ID #

4. Work independently​

Clear Target

I can convert numbers written in scientific notation to standard form.

​Scientific Notation to Standard Form

​Standard form is the actual value of the number.

​

Is the exponent positive or negative?

​

​Positive means the value will get _________, so move your decimal to the _________.

​

​Negative means the value will get ________, so move your decimal to the __________.

​Scientific Notation to Standard Form Y'ALL TRY

​Standard form is the actual value of the number.

​

Is the exponent positive or negative?

​

​Positive means the value will get _________, so move your decimal to the _________.

​

​Negative means the value will get ________, so move your decimal to the __________.

Multiple Choice

Write  $$1.72\times10^7$$  in standard form.

• 1,720,000

• 17,200,000

• 1,720,000,000

• 10,000,000

​Scientific Notation to Standard Form

​Standard form is the actual value of the number.

​

Is the exponent positive or negative?

​

​Positive means the value will get _________, so move your decimal to the _________.

​

​Negative means the value will get ________, so move your decimal to the __________.

​Scientific Notation to Standard Form Y'ALL TRY

​Standard form is the actual value of the number.

​

Is the exponent positive or negative?

​

​Positive means the value will get _________, so move your decimal to the _________.

​

​Negative means the value will get ________, so move your decimal to the __________.

Multiple Choice

Write  $$7.75\times10^{-2}$$  in standard form.

• 77,500

• 775

• 0.0775

• 0.00775

Poll

How do you feel about today's lesson?

• Great, I can teach someone else

• I feel good. I would like to practice more.

• I can do it with help.

• I can't do this at all.

​Exit Ticket

​Complete today's exit ticket that is posted on Google Classroom under the Classwork tab, under Week 3.

​

​Once you are done, please get your belonging and sit at your desk quietly.