Physical Science

Chapter 15: Classification of Matter

Standardized Test Practice

1
Which of the following statements about elements is true?
A)An element is composed of two or more different substances.
B)All known elements are naturally occuring.
C)Zinc, copper, and iron are elements.
D)There are about 150 known elements
2
Table salt, NaCl, is an example of which type of material?
A)colloid
B)element
C)compound
D)mixture
3
Based on the information shown, what percentage do the elements carbon and oxygen account for in the universe?

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A)less than 0.1%
B)1.0%
C)less than 0.2%
D)6.5%
4
Which element makes up about 27 percent of Earth’s crust?

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A)calcium
B)iron
C)silicon
D)oxygen
5
Based on the table, which of these compounds is most common in Earth's crust?

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A)aluminum carbide
B)iron oxide
C)sodium chloride
D)silicon dioxide
6
Based on the law of conservation of mass, which of these is a true statement?
A)The mass of the products is always greater than the mass of the materials which react in a chemical change.
B)The mass of the products is always less than the mass of the materials which react in a chemical change.
C)Matter is neither lost nor gained during a chemical change.
D)A certain mass of material must be present for a reaction to occur.
7
Which of these describes a chemical change?
A)When liquid water is heated, it changes to a gas.
B)When a piece of rock salt is hit with a hammer, it forms smaller crystals.
C)A glass rod placed in a flame becomes hot.
D)Gasoline burns in an engine to form carbon dioxide and water.
8
Which of these is a homogeneous mixture?
A)milk
B)apple juice
C)sand on a beach
D)sodium chloride
9
Muddy water is an example of a
A)colloid.
B)element.
C)suspension.
D)solution.
10
Which of these is not a physical property of a substance?
A)color
B)mass
C)melting point
D)flammability
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