Chemistry Chapter 1-3 Review 2.0

Air is classified as matter because: a) It is a mixture of gases b) It has mass and occupies space c) It can be compressed d) It is invisible.

• It is a mixture of gases

• It has mass and occupies space

• It can be compressed

• It is invisible

The Chinese characters for chemistry literally mean "change study." Why are these appropriate characters to represent chemistry?

• Because chemistry is related to biology.

• Because chemistry is a branch of physics.

• Because chemistry involves the study of changes in matter.

• Because chemistry is a historical study.

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Describe the main difference between inorganic chemistry and organic chemistry.

• Inorganic chemistry is the study of living organisms, while organic chemistry is the study of non-living matter.

• Inorganic chemistry and organic chemistry are the same fields of study.

• Inorganic chemistry deals with compounds that do not contain carbon-hydrogen bonds, while organic chemistry focuses on compounds with carbon-hydrogen bonds.

• Inorganic chemistry only studies metals, while organic chemistry only studies non-metals.

Is a scientist who is studying cancer with the goal of finding an effective treatment doing pure research or applied research?

• Applied research

• Pure research

Which of the following is not involved in scientific methodology?

• hypothesis

• theory

• guess

• experiment

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How do an independent variable and a dependent variable differ?

• There is no difference between an independent and a dependent variable.

• A dependent variable is manipulated to observe its effect on the independent variable.

• Both variables are manipulated simultaneously to observe their effects.

• An independent variable is manipulated to observe its effect on the dependent variable.

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During a science experiment, Avery and William observed that air is classified as matter because:

• It can be compressed

• It has mass and occupies space

• It is invisible

• It is a mixture of gases

Which of the following is a key component of the scientific method?

• speculation

• experiment

• belief

• opinion

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What is a mixture?

• A single element in its pure form

• A physical blend of two or more components

• A solution of a single component

• A chemical compound of two or more elements.

Fill in the blank: A mixture in which the composition is not uniform throughout is called a ____.