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8th Unit 4 Interactions of Matter - Unit Test Review Flashcards | StudBud
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8th Unit 4 Interactions of Matter - Unit Test Review
8th Unit 4 Interactions of Matter - Unit Test Review
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1
Endothermic reactions
_____.
release more energy than absorb or absorb more energy than release, depend
Release more energy than they absorb
Release and absorb exactly the same amount of energy
Absorb more energy than they release
2
Matter from which a
substance is or can be made
Synthetic materials
Natural materials
Materials
Atoms
3
Which best describes why synthetic material production is limited from country to country?
Economics
Both A & B
Science labs
Natural resource availability
4
A
secondary product
that results from a manufacturing process of chemical reaction is called a _______.
Reactant
Natural resource
Synthetic material
By-product
5
Qualitative
is to _____, whereas
quantitative
is to _____.
Measure, observe
None of the above
Measure, describe
Describe, measure
6
Malleability
is the ability to bend or form without breaking.
False
True
7
A chemical bond
absorbs energy
when it
breaks
.
True
False
8
Atoms rearrange
to form new…
Substances
Compounds
All of the above
Elements
9
For a property to be considered
chemical
, does the type of
matter (substance) change
?
No
Sometimes
Yes
Almost always
10
As
consumption
of a synthetic material
increases
, negative impacts to Earth required to produce the material
increase
.
False
True
11
A material that has been
altered by undergoing a chemical reaction
in a laboratory or factory is called a ____ material.
Wool
Natural
Concrete
Synthetic
12
Given the following chemical equation, how many atoms are there in total?
4C₂O
4
11
12
6
13
When reacting to acid, creates a new substance
…
This property is -
Base change
Flammability
Reactivity
Oxidation
14
According to the
Law of Conservation of Mass
, the total mass before and after a chemical reaction is ________.
None of the above
Less than
More than
The same as
15
Which of the following is
not
a way that
natural resources
are
obtained
?
Farmed from the land
Sourced from the ocean
Made in a factory
Extracted from Earth
16
Mass
and
weight
are units of measurement that are used interchangeably.
False
True
17
Clothes change color when they are dyed -
This describes a…
Physical change
Chemical change
Chemical property
Physical property
18
Physical matter that is obtained/made from plants, animals, or ground
w/o undergoing chemical process
is natural materia
False
True
19
Which of the following is
not
a
synthetic material
?
Wood
Bone china
Polyester
Concrete
20
When economic conditions are
favorable
, more effort is put into
synthetic materials
that satisfy
desires
not just needs.
False
True
21
synthetic materials
are different from the natural materials from which they are made b/c they undergo chemical process
True
False
22
Volume
is often used when measuring
irregularly shaped
objects.
True
False
23
Exothermic reactions
_____.
Absorb more energy than they release
Release and absorb exactly the same amount of energy
Release more energy than they absorb
release more energy than absorb or absorb more energy than release
24
When substances react w/oxygen to create a new substance, often seen as a color change
…
This property is -
Reactivity
Base change
Oxidation
Flammability
25
Melting/Boiling Points
are best described as…
Easily moves electricity and thermal energy
Temperature at which a material changes state
Temperature at which a material becomes liquid
Ability of one substance to dissolve into another substance
26
When a substance undergoes a
chemical change
, its
identity
does not change.
False
True
27
A
coefficient
is the # placed in front of the element symbol, indicating the # of sets.
False
True
28
What is the
density
of a substance with a
mass of 30 g
and a
volume of 3 mL
?
27 g/mL
10 g/mL
10 mL/g
90 g/mL
29
State of matter
is an example of a
physical property
.
True
False
30
Which of the following is
not
a sign of
chemical change
?
Color
Odor
All of the above
State of matter
31
Hydrogen and oxygen combine to form water. What is/are the
product(s)
?
Hydrogen & Oxygen
Water
32
Energy
is needed to
break bonds
in chemical reactions.
True
False
33
Substance A & Substance B are mixed. The temperature begins to change. Do I 100% know that a chemical change happened?
Yes
No
34
The chemical process in which
small organic molecules called monomers bond together
to form a chain is called…
Production
Polymerization
Modification
Technology
35
A
physical change
is when the substance maintains its properties, but may appear different.
True
False
36
Hydrogen and oxygen combine to form water. What are the
reactant(s)
?
Water
Hydrogen & Oxygen
37
Which of the following is
not
an impact of
using gasoline mixed with ethanol
instead of pure petroleum-based gasoline?
Decreases cost of fuel
Increases smog
Reduces dependency on petroleum
Decreases acid rain
38
Ability of a type of matter to burn easily
…
This property is -
Flammability
Base change
Oxidation
Reactivity
39
Which of the following is
not
an example of a
physical property
?
Color
Reaction w/acid
Volume
Mass
40
Conductivity
is best described as…
Temperature at which a material becomes liquid
Easily moves electricity and thermal energy
Temperature at which a material changes state
Ability of one substance to dissolve into another substance
41
Which of the following is an
example
of a
chemical change
?
Bending a pop can
Melting wax
Evaporating of milk
Burning paper
42
Which of the following
does not
apply to
density
?
Inversely proportional relationship
Ratio of the mass/unit volume of a substance
Proportional relationship
Remains the same for a substance
43
A substance’s _______________________ properties predict how it will
react
with other
substances
.
Exothermic
Chemical
Physical
Endothermic
44
The
practical use
of scientific knowledge
Materials
Investigation
Observation
Technology
45
Which of the following statements best describes a
physical property
?
Characteristics you can observe
Characteristics you can observe or measure by changing the substance
Characteristics you can observe or measure that do not change the substance
Characteristics you can measure
46
Solubility
is best described as…
Easily moves electricity and thermal energy
Temperature at which a material becomes liquid
Temperature at which a material changes state
Ability of one substance to dissolve into another substance
47
Forming a
chemical bond
_____.
Absorbs energy from the surroundings
Releases energy into the surroundings
Creates energy that did not previously exist
Uses up energy that then no longer exists
48
Which of the following is the
correct chemical equation for water
?
H₂ + O₂ → 2H4O
H₂ + O₂ → H₂ O
2H + 2O = H2O
H₂ + O₂ = H₂ O
49
If I combine
4
of
Element Q
&
7
of
Element V
, how many
amu
would I expect to find on
both sides
of equation?
4
11
7
3
50
One
of the
small organic molecules
that make up the long chain of a polymer
Monomer
Synthetic polymers
Polymerization
Tonomer
51
What is the
mass
of a substance with a
density of 20 g/mL
and a
volume of 4 mL
?
80 g
4 mL
8 g
80 mL
52
Leaves changing color in the fall -
This describes a…
Chemical change
Physical property
Physical change
Chemical property
53
Which of the following best describes the job of a
materials scientist
?
Examines the connection between the structure of a materials properties
Examines technology and its uses
Is inspired to make synthetic materials from natural materials
Compares and contrasts natural and synthetic materials
54
Which of the following is
not
an example of a
chemical property
?
Change of state
Oxidation
Reactivity
Flammability
55
When atoms of one or more substances
rearrange
to form one or more
new substances
Chemical change
Chemical reaction
Chemical property
Physical reaction
