WorksheetsPSC Concept 2 Test
Total questions: 12
Worksheet time: 6mins
Name
Class
Date
1.
A substance is
a)
a mixture of compounds.
b)
either an element or a compound.
c)
always an element.
d)
always a compound.
2.
A(n) _____ is a material made up of two or more substances that can be separated by physical means.
a)
substance
b)
mixture
c)
element
d)
compound
3.
Which of the following is an example of physical weathering?
a)
Calcium carbonate in limestone changes to calcium hydrogen carbonate.
b)
Stalactites precipitate in a cave.
c)
Flowing water carves erosion channels in a hillside.
d)
Acid rain corrodes a monument.
4.
Which of the following is a chemical change?
a)
Sugar dissolves in a cup of water.
b)
Glass bends as it is heated.
c)
Gas burns in an engine.
d)
Water expands as it freezes.
5.
A _______ is a heterogeneous mixture that never settles.
a)
colloid
b)
suspension
c)
solution
6.
Table salt (NaCl) is an example of which type of material?
a)
mixture
b)
element
c)
compound
d)
colloid
7.
Which of these warnings refers to a chemical property of the material?
a)
fragile
b)
shake well
c)
flammable
d)
sharp object
8.
Suppose you start to eat some potato chips from an open bag that you found in your locker and notice that they taste unpleasant. Which of the following best accounts for this unpleasant taste?
a)
chemical property
b)
chemical change
c)
physical property
d)
physical change
9.
A(n) ____________ is a substance in which atoms of two or more elements are combined in a fixed proportion.
a)
element
b)
compound
c)
atom
d)
molecule
10.
A mixture in which different materials can be distinguished easily is called a _______ mixture.
a)
heterogeneous mixture
b)
homogeneous mixture
11.
A change of one substance to another is a ________ change.
a)
physical
b)
chemical
12.
Bismuth and fluorine react to form bismuth fluoride. If 417.96 g of bismuth reacts completely with 113.99 g of fluorine, how many grams of bismuth fluoride are formed?
(a)
100 %
