Scientific Notation 2.0 x 10^0

Choose the number that is written in scientific notation.

• 0.78 x 10^-2

• 7.8 x 10³

• 78.0 x 10^-4

• 780 x 10⁵

Which of these numbers is the smallest?

• 3.5 x10⁷

• 3 x10⁷

• 5 x10⁷

• 5.5 x10⁷

To compare two numbers that are in scientific notation, first compare the ________ . If they are the same, then compare the ___________.

• decimals; exponents

• first number; next number

• exponents; decimals

Which of these numbers is the greatest?

• 9 x 10⁹

• 8.1 x10⁸

• 9.02 x10⁹

• 6.35 x10⁷

Place the following numbers in order from least to greatest:

7.8 x 10⁶, 5.1 x 10⁴, 1.25 x 10⁵, 4.09 x 10⁴

• 4.09 x 10⁴,

  1.25 x 10⁵,

  5.1 x 10⁴,

  7.8 x 10⁶

• 4.09 x 10⁴,

  5.1 x 10⁴,

  1.25 x 10⁵,

  7.8 x 10⁶,

• 1.25 x 10⁵,

  4.09 x 10⁴,

  5.1 x 10⁴,

  7.8 x 10⁶,

The diameter of the planet Mercury is

4.87 x 10³ km. The diameter of the planet Venus is 1.21x10⁴ km. The diameter of the planet Mars is 1.28 x 10³ km.

Which planet has the smallest diameter?

• Mercury

• Mars

• Venus

Square roots are the opposite of ____________.

• Cube Roots
• Squaring
• Multiplication
• Absolute Value

What is scientific notation?

• A long way to write really short numbers

• A short way to write really long numbers

• I don't know...

• None of the above