Name: Per: Date:------------------------------- ------ ------------- ID: A

Math 8 Scientific Notation Unit Review

Multiple ChoiceIdentify the choice that best completes the statement or answers the question.

1. Which number IS NOT written in scientificnotation?A) 3 x 10-8

B) 6.7 X 103

C) 8.7 X 10-5

D) 25.67 X 10-2

E) None of the above

Write the number in standard notation.

5. 9 X 104

A) 9,000B) 904

C) 90,000D) 360E) None of the above

2. Which number IS written in scientific notation?A) 7.8 x 10-5

B) 3.4 X 1002

C) 0.84 X 106

D) -5 X 10-12

E) None of the above

6. 9.07 X 10-2

A) 0.0907B) 0.907C) 0.00907D) -181.4E) None of the above

Write the number in scientific notation. 7. 6.21 X 10-5

A) 0.00000621B) 0.0000621C) 0.000621D) -310.5E) None of the above

3. 8,670,000,000A) 0.867 x 1010

B) 86.7 X 1008

C) 8.67 X 109

D) 8.67 x 10E) None of the above

4. 0.0805A) 80.5 x 100-3

B) 8.05 x 10C) 0.805 X 10-1

D) 8.05 X 10-3

E) None of the above

Simplify the expression. Write the answer usingscientific notation.

8. 8(8.8 X 1012)

A) 70.4 X 1012

B) 70.4 X 1024

C) 7.04 X 1013D) 1.68X 1013

E) None of the above

9. (9 x 107) ( 7 x 109

)

A) 6.3 X 1064

B) 63 X 1016

C) 1.6 X 1064

D) 1.6 X 1017

E) None of the above

10. Astronomers measure large distances in light-years.One light-year is the distance that light can travel inone year, or approximately 5,880,000,000,000miles. Suppose a star is 13.6 light-years from Earth.In scientific notation, how many miles away is it?A) 1.36 x 1012 milesB) 5.88 x 1012 milesC) 7.9968 x 1013milesD) 5.88 x 1013 milesE) None of the above

Add or subtract. Write your answer in scientificnotation.

11. 9.47x103+3.95xl03A) 1.342 X 107

B) 1.342 X 104

C) 1.342 X 103

D) 1.342 X 105

E) None of the above

12. 7.81 x 10-7 - 6.16 X 10-7

A) 1.65 X 10-7

B) 1.65 X 10-8

C) 1.65 X 10-14

D) 1.65 X 10-6

E) None of the above

13. 7.99 X 10-9 + 8.05 X 10-10

A) 8.795 X 10-10

B) 8.795 x 10-9

C) 1.604 X 10-18

D) 8.795 X 10-8

E) None of the above

14. 5.12 x 103 - 8.81 X 102

A) 4.239 X 102

B) 4.239 X 103

C) 3.69 X 105

D) 4.239 X 104

E) None of the above

2

Divide. Write your answer in scientific notation.

15. (5.2 x 105) -+- (1.3 X 105)

A) 4.0 X 10-1

B) 4.0 X 101

C) 2.5 X 10-1

D) 4.0 x 10°E) None of the above

16. (7.8 x 108) -+- (1.95 X 104

)

A) 4.0 X 105

B) 2.5 X 10-5

C) 2.5 X 10-5

D) 4.0 X 103

E) None of the above

17. About how many times greater is the thickness of anickel than the thickness of a dollar bill?

ItemThickness

(in centimeters)Penny 1.55 x 10-1

Nickel 1.95 x 10-1

Dime 1.35 x 10-1

Quarter 1.75 x 10-1

Half dollar 2.15 x 10-1

Dollar bill 1.0922 x 10-2

A) about 0.56 times greaterB) about 17.85 times greaterC) about 0.06 times greaterD) about 1.79 times greaterE) None of the above

Multiply. Write your answer in scientificnotation.

18. (8 x 10-5) X (5.6 X 109

)

A) 1.36 X 105

B) 1.36 X 103

C) 4.48 X 104

D) 4.48 x 103

E) None of the above

19. What is the length of the bacterium in scientificnotation?

0.0019 mm

A) 0.19 X 102 mmB) 1.9 x 103 mmC) 1.9 x 102 mmD) 1.9 x 10-3 mmE) None of the above

20. Each year, more than 425,000,000 gallons of waterare used to make man-made snow at a ski resort.Write this number in scientific notation.A) 0.425 x 107 galB) 4.25 x 107 gal

. 8C) 4.25 x 10 galD) 4.25 x 10-8 galE) None of the above

3