Exploring Scientific Notation in Pre-Algebra

What happens to a decimal number when it is multiplied by ten?

• The digits shift to the right.

• The digits shift to the left.

• The number is divided by ten.

• The number becomes negative.

What is the purpose of scientific notation?

• To confuse people.

• To make numbers easier to read.

• To simplify the representation of very large or very small numbers.

• To represent very small numbers only.

Why were units like feet, meters, and seconds originally chosen?

• To describe things on a human scale.

• To confuse students.

• For space exploration.

• For scientific research.

What does the exponent in scientific notation indicate?

• The number of zeros in the number.

• The number of digits after the decimal.

• How many places to shift the decimal point.

• The base number of the scientific notation.

What is the scientific notation for the distance to the nearest star, 25 trillion miles?

• 25 x 10^13

• 2.5 x 10^12

• 25 x 10^12

• 2.5 x 10^13

What unit of time is one yoctosecond?

• 10^-12 seconds

• 10^-30 seconds

• 10^-18 seconds

• 10^-24 seconds

What does an exponent of zero in scientific notation signify?

• The number is zero.

• The decimal point does not move.

• The number is negative.

• The decimal point moves to the right.

What does multiplying by ten to the zero power do to a number?

• Converts it to zero.

• Leaves it unchanged.

• Decreases it by ten.

• Increases it by ten.

How is the number 1 billion written in scientific notation?

• 1 x 10^12

• 1 x 10^3

• 1 x 10^9

• 1 x 10^6

How do you convert a very small decimal number to scientific notation?

• Shift the decimal point left and decrease the exponent.

• Shift the decimal point right and decrease the exponent.

• Shift the decimal point right and increase the exponent.

• Shift the decimal point left and increase the exponent.