Chemistry Concepts and Applications

Chapter 1: The Science of Matter

Chapter Test Practice

1
Which is NOT a feature of a scientific model?

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A)It helps you understand and explain observations.
B)It helps you predict behavior that has yet to be observed.
C)It is supported by experiments.
D)It helps you make observations.
2
Sand and sucrose are separated using the apparatus shown. This is an example of a __________.

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A)chemical change
B)physical change
C)chemical property
D)physical property
3
The number of atoms present before a chemical change is __________ the number of atoms present after a chemical change.

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A)not related to
B)greater than
C)equal to
D)less than
4
What would be the usual order of change to separate a heterogeneous mixture into its elements?

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A)First separate the mixture into a pure substance with physical changes, then change the pure substance into elements with chemical changes.
B)First separate the mixture into a pure substance with chemical changes, then change the pure substance into elements with physical changes.
C)First separate the mixture into a pure substance with physical changes, then change the pure substance into elements with physical changes.
D)First separate the mixture into a pure substance with chemical changes, then change the pure substance into elements with chemical changes.
5
Which change will NOT change the density of the material?

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A)Freezing water.
B)Pounding gold into a flat plate.
C)Burning a cork.
D)Heating the air inside a balloon.
6
Which two elements make up approximately 83% of your body by mass?

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A)carbon and hydrogen
B)carbon and oxygen
C)carbon and nitrogen
D)oxygen and nitrogen
7
A substance must be __________.
A)an element or a compound
B)an element
C)a homogeneous mixture
D)a heterogeneous mixture
8
A solution is __________.
A)a homogeneous mixture
B)an element
C)a compound
D)a heterogeneous mixture
9
Sterling silver is __________.
A)an alloy
B)a compound
C)an element
D)a heterogeneous mixture
10
A substance being dissolved is called __________.
A)an aqueous solvent
B)a solute
C)a solution
D)a solvent
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