$$1 \text{ m} = 1,000 \text{ mm}$$

Question 1

Which of the following is the correct scientific notation for the mass of a typical human cell, which is approximately 0.000001 g?

Accepted Answer

$$1 	imes 10$$^{-6}$$ g

Question 2

A blood sample has a mass of 0.02040 g. How many significant figures are in this measurement?

Accepted Answer

5

Question 3

Which SI prefix represents a factor of $$10^{-9}$$?

Accepted Answer

nano (n)

Question 4

A nurse measures a patient's temperature as 37.0 °C. How many significant figures are in this measurement?

Accepted Answer

3

Question 5

The diameter of a human hair is about $$7 	imes 10$$^{-5}$$ m. Which metric prefix is most appropriate for expressing this value?

Accepted Answer

micro ($$\mu)$$

Question 6

Which of the following measurements contains three significant figures?

Accepted Answer

2.50 cm

Question 7

A solution has a volume of 1.5 L. Express this volume in milliliters (mL).

Accepted Answer

1500 mL

Question 8

Which of the following zeros is NOT considered significant?

Accepted Answer

A zero at the beginning of a number (e.g. 0.0834)

Question 9

A laboratory sample weighs 0.00350 kg. How many significant figures does this measurement have?

Accepted Answer

4

Question 10

Which of the following is the correct scientific notation for 0.000000008 g?

Accepted Answer

$$8 	imes 10$$^{-9}$$ g

Question 11

A patient receives a dose of 0.5 mg of medication. Express this dose in micrograms ($$\mug).$$

Accepted Answer

500 $$\mug$$

Question 12

Which of the following is the best estimate for the volume of liquid in the graduated cylinder shown at 17.6 mL, considering significant figures?

Accepted Answer

17.6 mL

Question 13

A camera sensor has a resolution of 12 megapixels. How many pixels is this?

Accepted Answer

$$1.2 	imes 10$$^{7}$$ pixels

Question 14

Convert 0.0834 meters to centimeters (cm).

Accepted Answer

8.34 cm

Question 15

Which of the following is the correct scientific notation for 3,500 g?

Accepted Answer

$$3.5 	imes 10$$^{3}$$ g

Question 16

A femtogram (fg) is how many grams?

Accepted Answer

$$1 	imes 10$$^{-15}$$ g

Question 17

A lithium atom has a radius of $$1.5 	imes 10$$^{-10}$$ m. Which SI prefix would be most appropriate to express this value?

Accepted Answer

nano (n)

Question 18

A sample contains 0.000 000 001 g of a substance. Express this mass using the appropriate metric prefix.

Accepted Answer

1 nanogram (ng)

Question 19

Which of the following is the correct conversion factor to change meters to millimeters?

Accepted Answer

$$1 	ext{ m} = 1,000 	ext{ mm}$$

Question 20

A student records a measurement as 0.020 g. Which statement about the significant figures is correct?

Accepted Answer

There are two significant figures; the zero after the decimal is significant.

Scientific Measurement: Units, Prefixes, Significant Figures, and Scientific Notation

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