Chapter 2 Review What distinguishes a substance from

Chapter 2 Review

• What distinguishes a substance from a mixture? • A. substances are compounds, and mixtures are not • B. mixtures are groupings of elements, and compounds are not • C. samples of the same substance can have difference intensive properties • D. mixtures can be separated physically, while compounds cannot

• Which of the following is true about compounds? • A. they can be physically separated into their component elements • B. they have compositions that vary • C. they are substances • D. they have properties similar to those of their component elements

• Which of the following is true of a homogeneous mixture? • A. they are know as solutions • B. they consist of two or more phases • C. they have compositions that never vary • D. They are always liquids

• Which state of matter has a definite volume and takes the shape of its container? • A. solid • B. liquid • C. gas • D. both b and c

• A substance that forms a vapor is generally in what physical state at room temperature? • A. solid • B. liquid • C. gas • D. liquid or solid

• The variable that is observed during an experiment is called what type of variable? • A. independent • B. manipulated • C. controlling • D. responding

• A theory is • A. proposed explanation for an observation • B. well-tested explanation for a broad set of observations • C. summary of the results of many observations • D. procedure used to test a proposed explanation

• • • An example of an extensive property is A. temperature B. pressure C. mass hardness

• Which state of matter has a definite volume and takes the shape of its container? • Solid • Liquid • Gas • Both b and c

• A substance that forms a vapor is generally in what physical state at room temperature? • Solid • Liquid • Gas • Both b and c

• A substance that cannot be broken down physically is called a • Homogenous mixture • Element • Pure Substance • Heterogeneous mixture

• • • Which one of the following is a compound? Zinc Carbon Monoxide Carbon Iron