In scientific notation $a \times 10^n$, what does a positive integer exponent $n$ indicate about the original number?

The original number is between 0 and 1.

The original number is greater than or equal to 10.

The original number is negative.

The original number is a fraction.

Writing Scientific Notation Practice — Grade 8 math

Lesson 6: Writing Scientific Notation — Practice Questions

1. Which of the following numbers is correctly written in scientific notation?
- A. $14.2 \times 10^5$
- B. $0.88 \times 10^{-2}$
- C. $7.3 \times 10^8$
- D. $5 \times 100^3$
2. The approximate distance to the sun is 93,000,000 miles. Express this number in scientific notation: ___.
3. The width of a human hair is approximately 0.005 centimeters. How is this number written in scientific notation? ___
4. In scientific notation $a \times 10^n$, what does a positive integer exponent $n$ indicate about the original number?
- A. The original number is between 0 and 1.
- B. The original number is greater than or equal to 10.
- C. The original number is negative.
- D. The original number is a fraction.
5. A number is written in scientific notation as $3.14 \times 10^{-5}$. What is this number in standard decimal form? ___
6. If the length of a football field in miles is written in scientific notation, will the exponent on 10 be positive or negative?
- A. Positive
- B. Negative
7. Compute the product and write the answer in standard notation. $0.002 \times 10^{-2} = \_\_\_$
8. Write the number $385 \times 10^{-3}$ in proper scientific notation.
- A. $3.85 \times 10^{-5}$
- B. $3.85 \times 10^{-1}$
- C. $3.85 \times 10^0$
- D. $38.5 \times 10^{-2}$
9. Compute the product and write the answer in standard notation. $8 \times 10^{-6} = \_\_\_$
10. Write the number $4834$ in scientific notation.
- A. $4.834 \times 10^3$
- B. $4.834 \times 10^{-3}$
- C. $48.34 \times 10^2$
- D. $0.4834 \times 10^4$