Question 1

Which of the following best describes chemistry?

Accepted Answer

The study of matter—its composition, properties, and the changes it undergoes.

Question 2

Matter is defined as anything that:

Accepted Answer

Has mass and occupies space.

Question 3

Which scientific discipline would most likely study the chemical processes in plants?

Accepted Answer

Biochemistry

Question 4

A scientist observes a new phenomenon and wonders how it happens. What is the next step in the scientific method?

Accepted Answer

Hypothesize

Question 5

Which of the following statements represents a scientific law?

Accepted Answer

Gravity is the reason that an object tossed into the air comes back down.

Question 6

Which of the following is the correct order of steps in the scientific method?

Accepted Answer

Observation → Hypothesis → Experiment → Data Analysis → Conclusion → Peer Review & Publish.

Question 7

Which of the following is an example of an observation?

Accepted Answer

During an assessment, the nurse records the patient’s resting pulse as 32 beats per minute.

Question 8

Which of the following statements is a hypothesis?

Accepted Answer

If I drink coffee early in the morning, I will be able to sleep at night.

Question 9

Which of the following scientific notation values is written correctly?

Accepted Answer

$$5.220 	imes 10$$^{3}$$

Question 10

Convert $$1.25 	imes 10$$^{-4}$$ to standard notation.

Accepted Answer

$$0.000125$$

Question 11

Convert $$3.20 	imes 10$$^{-9}$$ to standard notation.

Accepted Answer

$$0.00000000320$$

Question 12

Convert $$1.6100 	imes 10$$^{4}$$ to standard notation.

Accepted Answer

$$16100$$

Question 13

Convert $$0.0000145 to $$scientific notation.

Accepted Answer

$$1.45 	imes 10$$^{-5}$$

Question 14

Convert $$101,325,000 to $$scientific notation.

Accepted Answer

$$1.01325 	imes 10$$^{8}$$

Question 15

A patient has high blood pressure. Which step of the scientific method would involve designing a diet that is low in sodium?

Accepted Answer

Design & Conduct Experiment

Question 16

Which of the following best describes a scientific theory?

Accepted Answer

A testable and verified hypothesis supported by a large body of evidence.

Question 17

Which of the following is a quantitative observation?

Accepted Answer

The patient’s body temperature is 39°C.

Question 18

If a number in scientific notation has a negative exponent, what does this indicate?

Accepted Answer

The number is less than one.

Question 19

Which of the following is NOT a step in the scientific method?

Accepted Answer

Making an untestable claim.

Question 20

A student converts $$707.82 to $$scientific notation. Which is the correct answer?

Accepted Answer

$$7.0782 	imes 10$$^{2}$$

Introduction to Chemistry: Concepts, Scientific Method, and Scientific Notation

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