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Chemistry Unit 2 Test Review
Energy can be stored in ____________ .
What is a pure substance?
Chemistry Unit 2 Test Review
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1
What is a pure substance?
Compounds
Atoms and elements
Atoms
Elements and compounds
2
Energy can be stored in ____________ .
fuel
batteries
all of the above
food
3
Theory has to be supported by what
Aw look at that picture
Facts, evidence and repeated testings
Your own brain
Fact, no testing needed though
4
Most elements on the periodic table are ____
nonmetals
gases
metals
5
fluorine, chlorine, bromine, iodine, and astatine
halogens
noble gases
nonmetals
metalloids
6
Which of the following is NOT a qualitative observation?
Her shirt is blue and white.
I see a goat by the water.
The texture of the table was smooth.
There are 5 kids in the classroom.
7
Which is an example of Heterogeneous Mixture
All of the above
A bowl of Chex Mix
A bowl of M&Ms
A bowl of mixed nuts
8
Which is a qualitative observation?
300,000 pounds
80 feet
scary
blue
9
Which of the following is a Heterogeneous mixture?
Salt Water
Soil
Steel
Air
10
Which is an example of a pure substance?
Glass
Sugar
Chocolate Chip Ice Cream
Granite
11
What is matter?
Matter is a something that will destroy things
Matter is a word?
Matter is anything that has mass and takes up space
I dont know
12
Which is not a physical property?
Density
Malleability
Ductility
Toxicity
13
Is Steel a Heterogeneous or Homogeneous Mixture?
Heterogeneous
Homogeneous
14
What is a qualitative observation?
an observation that involves describing
an observation that involves a number or measurement
15
A scientific law that states that matter cannot be created or destroyed.
Valence Electrons.
Conservation of Mass.
Element.
16
Define Organic Chemistry.
flowers growing on your house.
any substance that has a definite composion.
the use of math to observe principles.
the study of most carbon-containing compounds.
17
A pure substance made of only one kind of atom
colloid
solution
element
compound
18
An explanation you can test in an experiment is a...
theory
inference
hypothesis
thesis
19
The ________ have characteristics of both metals and nonmetals
non-metals
metalloids
transition metals
halogens
20
Name of Element
Phosphorus
Sulphur
Nickel
Potassium
21
Solubility is the chemical property
True
False
22
Definition of a controlled Experiment?
An experiment in which only one variable is changed at a time.
An experiment where all variables stay the same
An experiment where multiple variables are changed at once.
An experiment that doesn't change
23
Chemistry is the study of
the origin & history of the Earth.
composition & properties of matter.
the universe beyond Earth.
living things.
24
What is the chemical property
Melting point
Sour taste
Reacts with air
Odor
25
What is a physical property?
Appearance changes after it’s mixed with another substance
Something that happens in a repeated way.
Describes how a material reacts.
A property that can identify the object.
26
Baking soda is a heterogeneous mixture
False
True
27
A scientific model is a
representation of a real event or object
small building used to conduct experiments
new theory that takes the place of an incorrect one
mathematical statement of a theory
28
Observation may be
only qualitative
only quantitative
qualitative or quantitative
29
Applied research is research with
confounding variables
Clear uses and applications
experimental biases
no use, but is interesting
30
What is Kinetic Energy?
Energy that can also be considered as atoms
Energy that is apathetic
Stored Energy
Energy in motion
31
A pure substance is an example of an alloy
False
True
32
___________________ is a physical property.
ability to decompose
color
ability to rust
ability to burn
33
The _______ of the periodic table are called periods.
columns
elements
rows
atoms
34
Symbol of element
Mg
Mn
Na
K
35
My element name is:
Yestrium
Yotrium
Yaytrium
Yttrium
36
Which is an example of a Chemical property
Crushing a can
Mixing sand with water
Boiling water
Burning wood
37
What is the scientific method?
Series of steps that scientists use to solve & answer problems.
Steps to success.
A Secret.
A formula.
38
What are the 6 branches of chemistry?
organic, physical, theoretical, analytical, bio, inorganic
inoragnc, physical, analytical, bio, anti, theoretical
tech, bio, analytical, organic, theoretical, physical
oragnic, physical, chemcial, proton, ion, biochemistry
39
Is Pizza a Heterogeneous or Homogeneous Mixture?
Homogeneous
Heterogeneous
40
Can a pure substance be physically separated?
No
Yes
41
Which of these is a Chemical Property
Combustible
State of Matter
The Volume
Density
42
What element does the symbol Sn represent
Sulfur
Iron
Aresenic
Tin
43
An example of a pure substance is:
Paint
Salt Water
Water
Air
44
According to the Law of Definite Composition, any two samples of NaCl will have …
same mass
same boiling point
same mass ratio of elements
same melting point
45
Physical or Chemical property?
Malleability
Physical
Chemical
