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Worksheets8th Exam Review
Total questions: 50
Worksheet time: 35mins
Name
Class
Date
1.
You should never ______ chemicals in the lab.
a)
taste
b)
touch
c)
smell
d)
all of the above
2.
If you are not sure what to do during a lab activity:
a)
guess
b)
change lab partners
c)
ask a teacher
d)
just sit quietly and do nothing
3.
Girl serving a volleyball
a)
Potential
b)
Kinetic
4.
A rubber band has been pulled backward but hasn’t been let go yet.
a)
Potential
b)
Kinetic
5.
what type of energy is stored in a battery?
a)
electrical
b)
chemical
c)
thermal
d)
mechanical
6.
Which type of energy is most commonly produced during energy transformations?
a)
Light
b)
Heat
c)
Sound
d)
Electricity
7.
Is this activity as an example of potential or kinetic energy Choose “PE” or “KE”:
Boiling water.
Boiling water.
a)
PE
b)
KE
8.
What is the electrical charge of a proton?
a)
positive
b)
negative
c)
neutral, or no charge
9.
What is the electrical charge of an electron?
a)
positive
b)
negative
c)
neutral, or no charge
10.
The atomic number of this pictured element is
a)
28
b)
58.6934
c)
Ni
d)
Nickel
11.
What does the 1.00794 stand for?
a)
Hydrogen
b)
atomic number
c)
atomic mass
d)
atomic explosion
12.
What is the chemical symbol for Lithium?
a)
H
b)
He
c)
Li
d)
N
13.
What element is represented in this Bohr Model?
a)
Carbon
b)
Hydrogen
c)
Aluminum
d)
Lithium
14.
How many electrons should Neon have around its Lewis dot model?
a)
5
b)
6
c)
7
d)
8
15.
The atomic number tells you what?
a)
number of electrons
b)
number of protons
c)
number of neutrons
d)
both electrons and protons in an atom.
16.
How many valence electrons does Hydrogen have?
a)
1
b)
2
c)
3
d)
4
17.
How many valence electrons does Carbon have?
a)
4
b)
12
c)
6
d)
14
18.
Identify this atom.
a)
Lithium
b)
Boron
c)
Carbon
d)
Neon
19.
How many neutrons does oxygen have?
a)
16
b)
15.99
c)
8
d)
Doesn't contain any neutrons
20.
How many neutrons does NA have?
a)
11
b)
23
c)
22
d)
12
21.
This is a correct dot diagram for carbon (C)
a)
true
b)
false
22.
A substance that contains only one type of atom is a(n)
a)
compound
b)
element
c)
heterogeneous mixture
d)
homogeneous mixture
23.
This picture represents which of the following?
a)
Element
b)
Compound
c)
Mixture
24.
This picture represents which of the following?
a)
element
b)
compound
c)
mixture
25.
This picture represents which of the following?
a)
element
b)
compound
c)
mixture
26.
Which of these selections is an example of an element?
a)
H20
b)
Carbon
c)
sugar mixed with tea
d)
OH-
27.
What is the definition of a mixture?
a)
when a solute dissolves in a solvent
b)
a substance whose atoms has the same number of protons
c)
a thing that is composed of two or more separate elements
d)
one or more substances mixed together
28.
What is CO2 and example of?
a)
element
b)
mixture
c)
compound
29.
What is an ion?
a)
A Charged Atom
b)
A Large Atom
c)
A Small Atom
d)
A Cute Atom
30.
An atom becomes _________ when it gains electrons.
a)
Positive
b)
Negative
c)
Neutral
d)
Invinsible
31.
An atom becomes _______ when it loses electrons.
a)
Positive
b)
Negative
c)
Neutral
d)
Invinsible
32.
How are covalent bonds explained?
a)
When one atom takes the other atom's electron
b)
When the atom shares an electron with an another atom
c)
When the two nucleus merge
d)
When the neutrons leave the nucleus
33.
Ionic Bonding involves...
a)
The transfer of protons
b)
The transfer of neutrons
c)
The transfer of electrons
d)
Sharing electrons
34.
Generally, which has a higher melting point?
a)
molecular compounds
b)
ionic compounds
c)
They have about the same melting point
d)
such a generalization can't be made
35.
The state of matter that has no definite size or shape is
a)
Solid
b)
Liquid
c)
Gas
36.
The speed of the molecules determines the _____.
a)
volume
b)
density
c)
pressure
d)
temperature
37.
How is a gas defined?
a)
no shape, no volume
b)
Definite shape, definite volume
c)
Found in stars
d)
Definite volume, no shape
38.
Define a liquid
a)
no shape, no volume
b)
Definite shape, definite volume
c)
Found in stars
d)
Definite volume, no shape
39.
Which is Chemical Equation is Balanced?
a)
CH₄+O₂------CO₂+2H₂O
b)
H₂+O₂-----2H₂O₄
c)
4Al+3O₂-----2Al₂O₃
40.
24 g of magnesium reacts with 38 g of fluorine to produce _____ g magnesium fluoride
a)
62
b)
38
c)
24
d)
14
41.
What elements are in this compound?
a)
Carbon
b)
Hydrogen
c)
Nitrogen
d)
Oxygen
e)
Helium
42.
Am I a element or a compound:
H2
a)
Element
b)
Compound
43.
Which problem is balanced?
a)
PbO2 + 2H2
b)
SO2 + H20 --> H2SO4
c)
2Na + 2H2O --> 2NaOH + H2
44.
In an exothermic reaction, heat is ...
a)
taken in
b)
given out
45.
In an endothermic reaction, heat is ,,,
a)
taken in
b)
given out
46.
Is burning wood a chemical or physical change?
a)
chemical
b)
physical
47.
man made materials and substances that do not exist naturally in the environment
a)
nonrenewable products
b)
synthetic products
c)
systematic products
d)
none of the above
48.
Which is an example of conduction?
a)
Steam is rising from a cup of hot coffee.
b)
A hot biscuit is warming the plate it is on.
c)
The sun is shining through a window and warming a table.
d)
Grilling a hot dog over a campfire.
49.
Which best describes heat transfer by radiation?
a)
a slice of bacon frying in a pan
b)
a pot on a stove boiling water
c)
a camp fire warming hands
d)
a hot air balloon
50.
Warm air rises and the cool air sinks demonstrates this type of heat transfer.
a)
conduction
b)
convection
c)
radiation
d)
Insolation
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