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Neathery Physical Science/Chemistry Test #1 Flashcards | StudBud
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Neathery Physical Science/Chemistry Test #1
Neathery Physical Science/Chemistry Test #1
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Physical Science/Chemistry Chps. 1-3
Flashcards
40 cards
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Questions
40
Answers
1
What must occur for a change to be a chemical reaction?
The change must involve a change in volume.
There must be a change in chemical properties.
There must be a change in physical properties.
The change must involve a change in mass.
2
Which of the following is true about compounds?
They have compositions that vary?
They are substances.
They have properties similar to those of their component elements.
They can be physically separated into their component elements.
3
the study of all chemicals containing carbon
organic chemistry
inorganic chemistry
physical chemistry
analytical chemistry
4
Which state of matter is characterized by having a definite shape and definite volume?
both liquid and solid
gas
solid only
liquid only
5
A chemical change occurs when a piece of wood
is cut
decays
is painted
splits
6
Which state of matter has a definite volume and takes the shape of its container?
gas only
both liquid and gas
solid
liquid only
7
Which of the following is true about homogeneous mixtures?
they consist of two or more phases
they are always liquids
they are known as solutions
they have compositions that never vary
8
Separating a solid from a liquid by evaporating the liquid is called?
solution
condensation
distillation
filtration
9
A theory is a
procedure used to test a proposed explanation
proposed explanation for an observation
a summary of results
well-tested explanation for broad set of observations
10
Which of the following is a physical property?
combustible
explosive
melting point
ability to rust
11
the study of chemicals that, in general, do not contain carbon
analytical chemistry
inorganic chemistr
biochemistry
physical chemistry
12
Density is found by dividing
area by mass
volume by mass
mass by area
mass by volume
13
Which state of matter takes both the shape and volume of its container?
liquid only
gas only
both b and c
solid
14
The closeness of a measurement to its true value is a measure of its
precision
usefulness
accuracy
reproducibility
15
Which of the following represents a compound?
H
H-3
O-16
H2O
16
Collaboration and communication are important in science because
most scientists have the knowledge to solve any scientific problem
they increase the liklihood of a successful outcome
they keep scientists from having to repeat experiments
most research problems are not very complex
17
Which of the following is a heterogeneous mixture?
rotting of food
corrosion
milk
vinegar in water
18
The chemical formula of a compound indicates?
relative proportions of the elements in a compound
the source of the elements in the compound
alchemy symbols for the elements in the compound
how elements are joined in the compound
19
The chief advantage of the metric system over other systems of measurement is that it
is in multiples of 10
area by mass
has more units
mass by area
20
The first letter in a properly written chemical symbol is always?
underlined
bold faced
italicized
capitalized
21
The chemical symbol for iron is?
FE
fe
Fe
Ir
22
A substance that forms a vapor is generally in what physical state at room temperature?
liquid
solid
gas
liquid or solid
23
the study of the composition of matter
inorganic chemistry
physical chemistry
organic chemistry
analytical chemistry
24
Which of the following is a physical change?
evaporation
explosion
corrosion
rotting of food
25
Which of the following is a physical property of a substance in the liquid state?
definite volume
indefinite mass
not easily compressed
definite shape
26
The variable that is observed during an experiment is called what type of variable?
controlling
responding
manipulated
independent
27
Which of the following is a homogeneous mixture?
beef stew
salt water
soil
sand and water
28
the study of the processes that take place in organisms
inorganic chemistry
biochemistry
physical chemistry
organic chemistry
29
Which of the following is used for chemical symbols today?
numbers
drawings
letters
icons
30
Concerned with mechanism, rate, and energy transfer that occurs when matter undergoes a change
organic chemistry
physical chemistry
biochemistry
analytical chemistry
31
What distinguishes a substance from a mixture?
substances are compounds, mixtures are not
samples of the same substance can have different intensive properties.
mixtures are groupings of elements, compounds are not
composition of substances cannot vary, but mixtures can
32
Which of the following is a heterogeneous mixture?
soil
air
steel
salt water
33
The expression of 5008 km in scientific notation is
5.008 X E -3
5.008 E 4 km
50.08 E -4 km
5.008 E 3 km
34
Which of the following is a chemical change?
mixing two cheeses in a bowl
fermenting of cheese
melting cheese
grating cheese
35
Which of the following is a chemical property?
hardness
ability to react with oxygen
freezing point
color
36
Which state of matter expands when heated and is easy to compress?
gas
both liquid and solid
solid only
liquid only
37
Conversion factors are useful in solving problems in which a given measurement must be expressed in
scientific notation
significant digits
the correct precision
some other unit of measure
38
Which state of matter is characterized by having an indefinite shape, but a definite volume?
solid only
gas
both liquid and solid
liquid only
39
A substance that can be separated into two or more substances only by a chemical change is a(n)
mixture
solution
compound
element
40
Which of the following can be classified as a mixture?
pure air
pure nitrogen
pure water
pure gold
