Question 1

Which of the following best describes the difference between a scientific theory and a scientific law?

Accepted Answer

A scientific theory is a tested explanation for observations, while a scientific law is a statement of what generally occurs without explanation.

Question 2

Which of the following is an example of a chemical property?

Accepted Answer

Iron reacts with oxygen to form rust.

Question 3

A nurse inflates a blood pressure cuff. Which type of energy is primarily involved in this action?

Accepted Answer

Kinetic energy

Question 4

Which of the following numbers has 4 significant figures?

Accepted Answer

0.0001102

Question 5

Express $$0.0001038 in $$scientific notation.

Accepted Answer

$$1.038 	imes 10$$^{-4}$$

Question 6

A package weighs $$3.50 \ \mathrm{kg}. $$What is its weight in pounds (lb)? (Use $$1 \ \mathrm{kg} = 2.20 \ \mathrm{lb})$$

Accepted Answer

$$7.70 \ \mathrm{lb}$$

Question 7

How many microliters ($$\muL) $$are in $$0.0000005 \ \mathrm{L}$$? (Use $$1 \ \mathrm{L} = 1 	imes 10^6$ \ \mu\mathrm{L})$$

Accepted Answer

$$0.5 \ \mu\mathrm{L}$$

Question 8

A student is $$60.0$$ inches tall. What is the student's height in centimeters? (Use $$1 \ \mathrm{in} = 2.54 \ \mathrm{cm})$$

Accepted Answer

$$152 \ \mathrm{cm}$$

Question 9

Round $$0.0000876216 to $$three significant figures.

Accepted Answer

$$8.76 	imes 10$$^{-5}$$

Question 10

Calculate $$12.5849 + 2.4$$ and report the answer to the correct number of decimal places.

Accepted Answer

$$15.0$$

Question 11

Which of the following is NOT a base SI unit?

Accepted Answer

Liter (L)

Question 12

Convert $$9758 \ \mathrm{mg} of $$blood serum to grams. (Use $$1 \ \mathrm{g} = 1000 \ \mathrm{mg})$$

Accepted Answer

$$9.758 \ \mathrm{g}$$

Question 13

Which of the following is an example of kinetic energy?

Accepted Answer

A mountain climber rappelling down a cliff

Question 14

Which of the following is the correct formula to convert Celsius to Kelvin?

Accepted Answer

$$K = ^\circ C + 273.2$$

Question 15

A scientist measures the mass of a sample five times and gets values very close to each other, but far from the true value. This is an example of:

Accepted Answer

High precision, low accuracy

Question 16

Which of the following is a correct statement about significant figures in multiplication and division?

Accepted Answer

The result should have the same number of significant figures as the measurement with the fewest significant figures.

Question 17

Which of the following is an example of a physical property?

Accepted Answer

The boiling point of ethanol is $$78.4^\circ C$$

Question 18

Which of the following is the correct formula to convert Fahrenheit to Celsius?

Accepted Answer

$$^\circ C = \frac{(^\circ F - 32)}{1.80}$$

Chapter 1: Science and Measurements – Study Notes

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