1. Chapter 2 Review

2. 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

3. 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

4. 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

5. 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

6. 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

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

8. 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

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

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

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

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

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