Scientific Notation

Which of the following would be a reasonable estimate for the weight of a pencil?

• 1x10^-20 lb

• 1x10² lb

• 1x10²⁰ lb

• 1x10^-2 lb

Tags

CCSS.8.EE.A.3

A possible wavelength for the color blue is 0.000000492 meter. Which of the following is a reasonable estimate for this wavelength for the color blue.

• 5x10⁶ m

• 5x10⁷ m

• 5x10^-6 m

• 5x10^-7 m

Tags

CCSS.8.EE.A.3

The population of Oklahoma City was approximately 560,000 in 2009. The population of Oklahoma City was approximately 445,000 in 1990. What is the difference between the approximated populations of Oklahoma City?

• 1.15 x 10⁵

• 2.493 x 10¹²

• 1.005 x 10⁶

• 1.15 x 10⁶

Tags

CCSS.8.EE.A.4

The contents of a cell in a spreadsheet are shown below.

1.0304283E-5

What number does the contents of the cell represent?

• It represents 0.0000010304283

• It represents 0.000010304283

• It represents 103,042.83

• It represents 10,304.283

Tags

CCSS.8.EE.A.3

Which shows the expression below in simplified form.

(5 x 10⁴) x (4 x 10^-4)

• 2 x 10²

• 9 x 10⁰

• 2 x 10^-1

• 2 x 10¹

Tags

CCSS.8.EE.A.4

The table shows the atomic radii of four elements. Which list shows the atomic radii of the elements ordered from greatest to least?

• Potassium, Boron, Silver, Argon

• Boron, Argon, Potassium, Silver

• Potassium, Silver, Boron, Argon

• Argon, Boron, Silver, Potassium

Tags

CCSS.8.EE.A.3

The contents of a cell in a spreadsheet are shown below.

8.6974E6

What number does the contents of the cell represent?

• 0.0000086974

• 8,697,400

• 0.00000086974

• 86,974,000,000

Tags

CCSS.8.EE.A.3

Which shows the expression below simplified?

(5x10^-5) x 0.00008

• 4 x 10^-10

• 4 x 10^-9

• 4 x 10²⁵

• 1.3 x 10²⁵

Tags

CCSS.8.EE.A.4

Which shows the expression below simplified?
 $0.00042\ \div\ \left(7\ \times\ 10^{-3}\right)$  

•  $6\times10^0$  

•  $6\times10^{-3}$  

•  $6\times10^{-1}$  

•  $6\times10^{-2}$  

Tags

CCSS.8.EE.A.4

A sodium hydroxide solution contains  $7.9\times10^{-5}$   kg of sodium hydroxide. A sodium chloride solution contains  $1.2\times10^{-7}$  kg of sodium chloride. Which estimate best describes the quotient shown?
 $\frac{7.9\times10^{-5}}{1.2\times10^{-7}}$  

• between 6,000 and 7,500

• between 0 and 2

• between 0 and 1

• between 700 and 900

Tags

CCSS.8.EE.A.4