Mrs. Lee
9/13/07
Physical Science – Chapter 2 Practice Test Answer Key
______ a
1) Which of the following is a physical property of an element?
a) color
b) ability to rust
c) flammability
d) ability to tarnish
______ c
2) Which of the following is NOT a characteristic of a compound?
a) has different properties from the elements that formed it
b) pure substance made of two or more elements
c) different samples have different properties
d) can be represented by a chemical formula
______ a
3) A measurement of the amount of matter in an object is its ______.
a) mass
b) density
c) volume
length
______ c
4) Every chemical or physical change in matter includes a change in ______.
a) volume
b) temperature
c) energy
d) mass
______ d
5) A(n) ______ is an example of a homogeneous mixture that is very evenly mixed.
a) compound
b) element
c) pure substance
d) solution
______ c
6) A chemical bond is ______.
a) a group of atoms that are joined together
b) The basic particle of matter
c) The force that holds two atoms together
d) A substance formed from the chemical combination of two or more atoms
______ d
7) Which of the following is an example of a chemical change?
a) melting butter
b) mixing milk and chocolate syrup
c) breaking glass
d) burning fuel
______ a
8) Which of the following is NOT true of atoms?
a) They are composed of molecules.
b) They are combined with other atoms.
c) They make up elements.
d) They are extremely small.
______ d
9) A(n) ______ of a pure substance can be observed without changing the substance.
a) chemical property
b) atom
c) element
d) physical property
______ a
10) ______ is stored in the bonds that hold atoms together.
a) Chemical energy
b) Physical energy
c) Thermal energy
d) Electromagnetic energy
______ b
11) A(n) ______ is a group of atoms that are joined together by chemical bonds.
a) roundtuit b) molecule c) element
d) substance
______ c
12) A pure substance made of two or more elements that are chemically combined is
a(n) ______.
a) substance b) element
c) compound d) atom
______ d
13) A measure of the average energy of random motion of particles of matter is ______.
a) energy
b) running
c) eventful
d) temperature
Chapter 2 Practice Test Answer Key
1
9/13/07
Mrs. Lee
9/13/07
Physical Science – Chapter 2 Practice Test Answer Key
______ a
14) A pure substance that cannot be broken down into any other substances by
chemical means is called a(n) ______.
a) element
b) compound
c) rabbit
d) album
______ a
15) ______ is the ability to do work or cause change.
a) energy
b) homework
c) teacher
d) atom
______ b (physical change) 16) During a chemical change, the form of a substance is altered, but
not its identity.
a) True
b) False
______ a
17) A change in matter in which energy is taken in is an endothermic change.
a) True
b) False
______ a
18) Electrical energy is the energy of electrically charged particles moving from one
place to another.
a) True
b) False
______ a
19) Iron being separated from iron ore by melting it in a furnace is an example of a
chemical change.
a) True
b) False
______ b (solid)
20) Ice is an example of the liquid state of matter.
a) True
b) False
______ a
______ c
21) Which is a physical property?
a) color
b) ability to burn
22) An atom ______
a) is the largest piece of matter.
c) Is a particle of an element.
c) ability to rust
b) is made up of compounds.
______ c
23) A chemical bond is ______.
a) a physical property
b) The smallest piece of matter
c) The force that holds atoms together
______ c
24) A compound ______.
a) is the same as a mixture
b) Has the same properties as the elements it is made of
c) Has different properties from the elements it is made of
______ b
25) The parts of a mixture ______.
a) cannot be separated
b) Are easily separated
c) Have new properties after they are mixed
Chapter 2 Practice Test Answer Key
2
9/13/07
Mrs. Lee
9/13/07
Physical Science – Chapter 2 Practice Test Answer Key
______ a
26) The amount of matter in an object is its ______.
a) mass
b) weight
c) volume
______ b
27) Groups of atoms held together by chemical bonds form ______.
a) mixtures b) molecules c) solutions d) energy
______ a
28) Which is an example of a chemical change?
a) burning wood
b) freezing water
c) bending a paper clip
______ b
29) Which of the following is an example of a change of state?
a) pouring chocolate syrup over ice cream b) melting ice in a glass of lemonade
c) stretching copper into a wire
______ a
30) Anything that has mass and takes up space is called ______.
a) matter
b) junk
c) definite
d) something
______ d
31) A(n) ______ change produces new substances with properties that differ from the
original substances.
a) physical
b) normal
c) special
d) chemical
______ b
32) The ability to do work is called ______.
a) school
b) energy
c) life
d) matter
______ c
33) A mixture in which the separate parts of the mixture are very evenly mixed
together is called a(an) ______.
a) messy
b) exact
c) solution
d) junction
______ a
34) Light is an example of ______ energy.
a) electromagnetic
b) heat
c) inorganic
d) reflected
______ a
35) Elements are the simplest substances.
a) True
b) False
______ b
36) Electrical energy is stored in the bonds that hold atoms together.
a) True
b) False
______ b
37) In a physical change, matter changes into a new kind of matter.
a) True
b) False
______ a
38) Thermal energy flows from warmer objects to cooler objects.
a) True
b) False
______ a
39) Electrical energy is the energy of moving charged particles.
a) True
b) False
______ d
40) The fourth, theoretical state of matter is called ______.
a) sun
b) plasma
c) blood
d) nothing, it doesn’t exist
Chapter 2 Practice Test Answer Key
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9/13/07
Mrs. Lee
9/13/07
Physical Science – Chapter 2 Practice Test Answer Key
______ b
41) What is the best title for the chart below?
a) Chemical Properties of Some Compounds
b) Physical Properties of Some Elements
c) The Periodic Table of the Elements
d) Gases Found in Air
Helium
Iron
Oxygen
(TITLE?)
Colorless; less dense than air
Attracted to a magnet; melting point of 1,535oC
Odorless; gas at room temperature
A scientist did an experiment, described by the words and symbols below. Use the information
to answer the following three questions.
Hydrogen + oxygen  water + energy
______ c
42) The scientist found that 2 grams of hydrogen reacted completely with 16 grams of
oxygen. What was the total mass of water produced?
a) 8 grams
b) 14 grams c) 18 grams d) 32 grams
______ a
43) The properties of the water produced by the reaction are ______.
a) different from the properties of both hydrogen and oxygen
b) the same as the properties of both hydrogen and oxygen
c) the same as the properties of hydrogen, but different from the properties of oxygen
d) the same as the properties of oxygen, but different from the properties of hydrogen
______ a
44) Which pair of terms best describes the type of change that occurred in the reaction?
a) chemical and exothermic b) chemical and endothermic
c) physical and exothermic d) physical and endothermic
______ d
45) The fact that matter is neither created nor destroyed in any chemical or physical
change is called the ______.
a) law of exothermic change b) law of endothermic change
c) law of thermal change
d) law of conservation of matter
______ a
46) How would you classify the burning of natural gas?
a) exothermic chemical change
b) endothermic chemical change
c) exothermic physical change
d) endothermic physical change
Chapter 2 Practice Test Answer Key
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9/13/07