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Physical Science Ch.2 Review For Test
Test Description: PS Ch.2 material
Instructions: Answer all questions to get your test result.
1) Matter is defined as anything that
A
contains kinetic or potential energy.
B
can be weighed.
C
can be seen and touched.
D
has mass and takes up space.
2) The smallest unit of a substance that behaves like the substance is
A
a compound
B
a molecule
C
an element
D
an atom
3) The chemical symbol for phosphoric acid is H3PO4. How many atoms are contained in each molecule of phosphoric acid?
A
7
B
none of the above
C
8
D
4
4) A material that can be represented by a chemical formula is
A
a homogeneous solution
B
a mixture.
C
an element.
D
a pure substance
5) Knowing the chemical properties of a substance will tell you how the substance
A
can be broken down into atoms
B
reacts with other substances
C
looks
D
smells
6) Which of the following is NOT an example of a physical property?
A
density
B
freezing point
C
flammability
D
melting point
7) Lead has a density of 11.3 g/cm^3 and a mass of 138.5 g. What is its volume?
A
12.3 cm^3
B
1565.1 cm^3
C
none of the above
D
0.08 cm^3
8) Which of the following is an example of a physical change?
A
cooking a pancake
B
dissolving sugar in water
C
burning wood
D
a metal corroding
9) Which of the following is an example of a chemical change?
A
playing a piano
B
cooking a pizza
C
none of the above
D
melting a metal
10) Which of the following is NOT a potential sign of a chemical change?
A
release of a gas
B
change of color
C
evaporation of water
D
production of gas
11) Aluminum, nitrogen, and sulfur are examples of __________________.
A
elements
B
compounds
C
mixtures
D
none of the above
12) Each molecule of aluminum oxide, Al2O3 contains _____________ atoms of aluminum.
A
2
B
5
C
6
D
none of the above
13) Two or more liquids that can dissolve into each other are referred to as ___________________.
A
none of the above
B
homogeneous
C
miscible
D
immiscible
14) A mixture of flour and water is called a ___________________ mixture because the substances do not dissolve.
A
none of the above
B
heterogeneous
C
miscible
D
homogeneous
15) A substance that cannot be broken down into simpler substances is
A
an atom
B
a mixture
C
an element
D
a compound
16) A molecule of carbon dioxide (CO2) is made from ______________ combining one carbon atom and two oxygen atoms.
A
ionically
B
chemically
C
thermally
D
physically
17) How many oxygen atoms are in one molecule of table sugar (C12H22O11)?
A
2
B
12
C
22
D
11
18) A liquid changes rapidly into a gas at the liquid's
A
melting point
B
boiling point
C
freezing point
D
condensation point
19) What is the density of a sample of gas with a mass of 45 g and volume of 8500 cm^3?
A
none of the above
B
0.005 g/cm^3
C
382,500 g/cm^3
D
188.9 g/cm^3
20) What is the mass of a solid with a density of 13.8 g/cm^3 and volume of 325 cm^3?
A
none of the above
B
0.04 g
C
4,485 g
D
23.6 g
*select an answer for all questions
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