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