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Chemistry Final Exam Review (Chapters 1 & 2 – Introduction to Chemistry, Matter & Change) Flashcards | StudBud
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Chemistry Final Exam Review (Chapters 1 & 2 – Introduction to Chemistry, Matter & Change)
What is a property of a homogeneous mixture?
In a controlled experiment,
Chemistry Final Exam Review (Chapters 1 & 2 – Introduction to Chemistry, Matter & Change)
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1
In a controlled experiment,
only one variable at a time is deliberately changed.
there are many responding variables.
the responding variable is deliberately changed.
the responding variable is kept constant.
2
What is a property of a homogeneous mixture?
more than one phase
can easily see the components
uniform throughout
only one phase
3
A scientific theory
often takes a long time to develop
is just a guess
is supported by lots of experiments
does not explain anything in particular
4
Which one is NOT a big idea of chemistry?
Electrons are important in determining chemical reactivity.
Chemistry is the most important science.
Matter is composed of atoms.
Compounds are combinations of elements.
5
What shape does a direct proportion have on a graph?
what do you mean by "direct proportion?"
curved line
jagged line
straight line
6
Filtration is separation of a mixture by
size of components
density of components
boiling point of components
magnetic properties of components
7
The law of conservation of mass states that
mass of reactants must equal mass of products
matter cannot be created or destroyed
sometimes mass disappears when you're not watching closely
endangered animals should be protected
8
A pure substance can be a(n)
element
compound
homogeneous mixture
heterogeneous mixture
9
Mixtures must always have the same properties
false
true
10
Which phase of matter has no definite shape or volume?
phase?
solid
gas
liquid
11
A row of the periodic table is also called a
leg
group
period
family
12
A physical property
can be observed without changing a substance
is flammability
is the same thing as a chemical property
can be observed only when changing a substance
13
What is a sign of a chemical change?
release of energy as heat or light
formation of a precipitate (solid)
formation of a gas
Sagittarius
14
A scientific law
can be used to make predictions about what will happen
explains many observations
explains one observation
summarizes many observations
15
An intensive property
is mass
depends on the amount of matter
is so intense
does not depend on the amount of matter
16
What are the building blocks of all matter?
magnetic fields
atoms
forces
kinetic and potential energy
17
Which type of graph shows how a part of something relates to the whole?
bar
direct proportion
circle or pie
line
18
Two branches of chemistry are
geology
biology
biochemistry
organic
19
A column of the periodic table is also called a
period
family
chair
group
20
When the manipulated and responding variables have a constant ratio it is a __________.
interdependent
curve
direct proportion
inverse proportion
21
What is a safe lab practice?
Drinking out of beakers.
Touching hot objects with bare hands.
Tying back long hair and loose clothing.
Directly inhaling vapors.
22
A chemical combination of elements in a fixed proportion is a(n)
heterogeneous mixture
compound
element
homogeneous mixture
