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Ch. 17: Classification of Matter

Multiple Choice

Answer all the Multiple Choice Questions then hit "Check" after the last multiple choice question

Which of the following statements about elements is true?
An element is composed of two or more different substances
All known elements are naturally occuring
Zinc, copper, and iron are elements
There are about 30 known elements

Table salt, NaCl, is an example of which type of material?
colloid
element
compound
mixture

Based on the law of conservation of mass, which of these is a true statement?
The mass of the products is always greater than the mass of the materials which react in a chemical change
The mass of the products is always less than the mass of the materials which react in a chemical change
Matter is neither lost nor gained during a chemical change
A certain mass of material must be present for a reaction to occur

Which of these describes a chemical change?
When liquid water is heated, it changes to a gas
When a piece of rock salt is hit with a hammer, it forms smaller crystals
A glass rod placed in a flame becomes hot
Gasoline burns in an engine to form carbon dioxide and water

Which of these is a homogeneous mixture?
milk
apple juice
raisin bread
sodium chloride

Muddy water is an example of a ________ because it will eventually settle out?
colloid
element
solution
suspension

Which of these is not a physical property of a substance?
color
mass
melting point
flammability

If you have to use a microscope in order to see the substances in a mixture, that mixture is __________ .
heterogeneous
homogeneous
a solution
microgeneous

A(n) __________ is a substance in which all the atoms in it are alike.
element
compound
mixture
suspension
solution

The proportions of substances in a mixture __________ .
are always equal for each substance in the mixture
can vary among the substances
never can be determined accurately
are always the same for each substance

A change in size, shape, or state of matter is a __________ .
chemical property
physical property
chemical change
physical change

Which of the following is a chemical change?
boiling water
evaporation of water off a lake
crushing an aspirin tablet
burning of a log

Which of the following is a physical property?
flammability
magnetism
changes when exposed to light
freezing

A(n) __________ is a substance in which all the exact combinations of elements are always the same.
solution
suspension
compound
mixture
colloid

A __________ is a heterogeneous mixture that never settles.
solution
suspension
compound
mixture
colloid

Which of the following is NOT a physical property
temperature
melting point
color
hardness
all are physical properties

A copper wire will bend. This is an example of _____.
a chemical property
a physical property
law of conservation
a chemical change

Some evidence a chemical reaction has occured is
fizzing/bubbling
change in color
phase change
magnetism






Physical Science