Scientific Notation and Measurement Quiz

Which of the following is the correct scientific notation for 0.00045?

• 4.5 × 10⁻³

• 4.5 × 10⁻⁴

• 45 × 10⁻⁵

• 4.5 × 10³

Convert 6.75 m/s into scientific notation.

• 6.75 × 10⁻¹ m/s

• 0.675 × 10¹ m/s

• 6.75 × 10⁰ m/s

• 67.5 × 10⁻² m/s

If a mass is measured as 3.25 kg with an uncertainty of 0.01 kg, what is the relative uncertainty?

• 3.08%

• 0.31%

• 2.33%

• 0.03%

How many significant figures are in the number 0.03020?

• 2

• 3

• 4

• 5

Which of the following is the best estimate for the speed of light in scientific notation?

• 3 × 10⁶ m/s

• 3 × 10⁸ m/s

• 3.0 × 10⁷ m/s

• 3.0 × 10⁵ m/s

What is the SI unit for length?

• Gram

• Meter

• Liter

• Newton

What is the value of 2.4 × 10³ + 5.6 × 10²?

• 2.96 × 10³

• 2.96 × 10²

• 1.6 × 10²

• 3.0 × 10³

Express 0.000325 m in scientific notation.

• 3.25 × 10⁴ m

• 3.25 × 10⁻⁴ m

• 3.25 × 10⁻³ m

• 3.25 × 10⁻⁵ m

Which of the following describes precision?

• The closeness of a measurement to the true value.

• The closeness of repeated measurements to each other.

• The correctness of a measurement instrument.

• The size of the measuring unit.

A measurement with low accuracy and high precision would be described as:

• Close to the true value but inconsistent.

• Consistent but far from the true value.

• Both inconsistent and inaccurate.

• Consistent and close to the true value.