Grade 8 Algebra: Word Problems: Scientific Notation

Name: ______________________Date: ____________Score: ____ / 8

Level 1

Writing real-world numbers

1. Write in scientific notation:
$\text{The}$ $\text{Sun}$ $\text{is}$ $\text{about}$ $\text{150000000}$ $\text{km}$ $\text{from}$ $\text{Earth.}$
2. Write in scientific notation:
$\text{A}$ $\text{human}$ $\text{hair}$ $\text{is}$ $\text{about}$ $\text{0.00008}$ $m\text{}$ $\text{wide.}$
3. Write in scientific notation:
$\text{About}$ $\text{8000000000}$ $\text{people}$ $\text{live}$ $\text{on}$ $\text{Earth.}$
4. Write in scientific notation:
$\text{A}$ $\text{grain}$ $\text{of}$ $\text{sand}$ $\text{has}$ $\text{a}$ $\text{mass}$ $\text{of}$ $\text{about}$ $\text{0.0000044}$ $\text{kg.}$
5. Write in standard form:
$\text{The}$ $\text{Moon}$ $\text{is}$ $\text{about}$ $3.84\times 10^{5}\text{}$ $\text{km}$ $\text{from}$ $\text{Earth.}$
6. Write in standard form:
$\text{A}$ $\text{dust}$ $\text{particle}$ $\text{is}$ $\text{about}$ $2.5\times 10^{-6}\text{}$ $m\text{}$ $\text{wide.}$
7. Write in scientific notation:
$\text{A}$ $\text{red}$ $\text{blood}$ $\text{cell}$ $\text{is}$ $\text{about}$ $\text{0.000007}$ $m\text{}$ $\text{wide.}$
8. Write in standard form:
$\text{Earth}$ $\text{is}$ $\text{about}$ $4.5\times 10^{9}\text{}$ $\text{years}$ $\text{old.}$