Name:    Quiz 7-3: Scientific Notation

Multiple Choice
Identify the letter of the choice that best completes the statement or answers the question.

1.

Express the number in scientific notation. 0.000015
 a. c. b. d.

Evaluate the expression. Express the result in scientific notation.

2.

 a. c. b. d.

3.

 a. c. b. d.

4.

A horse fossil, found in John Day Fossil Beds National Monument, is approximately old. Express in standard form.
 a. 3500 c. 0.00035 b. 0.0035 d. 35,000

5.

The smallest blood vessels in the human body are called capillaries. Capillaries are approximately millimeters in diameter. Express the diameter of one capillary in standard form.
 a. 0.008 c. 800 b. 8000 d. 0.0008

6.

The area of Lake Huron in North America is square miles, the area of Lake Nicaragua in Central America is square miles, and the area of Lake Victoria in Africa is square miles. Rank the lakes in order from largest to smallest.
Source: “World Explorations and Geography,” The World Almanac and Book of Facts, Ed. Famighetti, Robert. Funk and Wagnalls: Mahwah, New Jersey, 1995.
 a. Lake Victoria, Lake Nicaragua, Lake Huron b. Lake Victoria, Lake Huron, Lake Nicaragua c. Lake Huron, Lake Nicaragua, Lake Victoria d. Lake Nicaragua, Lake Huron, Lake Victoria

7.

There are approximately stars in the Milky Way galaxy. About how many stars would be in 100 galaxies the size of the Milky Way?
 a. stars c. stars stars b. stars d. stars

8.

Oceanographers look at water samples through microscopes. A microscope set on makes an object appear to be 1000 times larger than its actual size. If the actual size of a diatom, a single-celled organism that lives in oceans, is millimeters, how large will it appear under a microscope set on ?
 a. 6 mm c. mm b. 60 mm d. mm

9.

What is 4173 expressed in scientific notation?
 a. 4.173 x 103 c. 417.3 x 10 b. 41.73 x 102 d. 4.172 x 10-3

10.

What is the value of (4 x 10-2)(2 x 108)?
 a. 8 x 10-16 c. 6 x 106 b. 8 x 106 d. 6 x 10-16

11.

Express the number in scientific notation. .026

Evaluate the expression. Express the result in scientific notation.

12.

13.

14.

A fossil from the Burgess Shale in Canada is thought to be approximately years old.
Express in standard form.

15.

The actual size of a bacterium viewed through a microscope is millimeters.
Express 7.5 ´ 10-4 in standard form.

16.

The area of Afghanistan is 2.52 ´ 105 square miles, the area of Greece is 5.09 ´ 104 square miles, and the area of Spain is 1.95 ´ 105 square miles. Rank the countries from largest to smallest.
Source: “Nations of the World,” The World Almanac and Book of Facts, Ed. Famighetti, Robert. Funk and Wagnalls: Mahwah, New Jersey, 1995.

17.

Lab technicians view laboratory samples through microscopes. An electron microscope with a magnification power of 10,000´ makes objects appear 10,000 times larger than their actual size. A red blood cell is 7.5´ 10-3 millimeters in diameter. How large would a red blood cell appear to be under an electron microscope with 10,000´ magnification?

18.

If the altitude of a satellite is 5.4 ´ 102 kilometers, what is its altitude in meters? (1 km = 1000 m) Express your answer in scientific notation.