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