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WorksheetsUnit 6 Review
Total questions: 45
Worksheet time: 26mins
Name
Class
Date
1.
Balance this equation, Al2O3 ---> Al + O2
a)
Cannot be balanced
b)
2Al2O3 ---> 2Al + 3O2
c)
2Al2O3 ---> 4Al + 3O2
d)
3Al2O3 ---> 2Al + O2
2.
How many Al atoms are in this compound? 4Al2O3
a)
2
b)
8
c)
6
d)
4
3.
A chemical reaction that produces energy is a /an
a)
endothermic reaction
b)
exothermic reaction
c)
energy
d)
chemical reaction
4.
A chemical reaction that requires energy is a
a)
exothermic reaction
b)
endothermic reaction
c)
over reaction
5.
Salt dissolved in water is an example of:
a)
colloid
b)
solution
c)
element
6.
A combination of substances that are not chemically combined is called a(n)____________.
a)
mixture
b)
compound
c)
physical
7.
Located on the left side of the reaction
a)
reactants
b)
products
8.
Is sour milk a chemical or physical change?
a)
chemical
b)
physical
9.
Is burning toast a chemical or physical change?
a)
physical
b)
chemical
10.
Is spoiled meat a chemical or physical change?
a)
chemical
b)
physical
11.
Which is an example of a physical property?
a)
rusting
b)
boiling point
c)
combustion
d)
reactivity with water
12.
Flammability is an example of what property?
a)
Chemical property
b)
Physical property
13.
This is an example of a
a)
physical change
b)
chemical change
14.
Ability to rust is this type of property:
a)
Physical property
b)
Chemical property
15.
Which is an example of a physical property?
a)
ability to react with acid
b)
color
c)
flammability
d)
ability to react with oxygen
16.
Physical properties are
a)
properties that can be observed without changing the identity of the substance
b)
properties that describe how a substance changes into a completely different substance
c)
properties that we can only observe with our eyes
d)
properties that we need special tools to observe
17.
In an endothermic reaction, heat is ,,,
a)
taken in
b)
given out
18.
What type of reaction occurs in a hand warmer
a)
exothermic
b)
endothermic
19.
What is Viscosity?
a)
A liquid's resistance to flow.
b)
A liquid's ability to flow.
c)
A liquid's flowing speed.
d)
The measurement of time it takes a solid to change to a liquid.
20.
What is Viscosity?
a)
A liquid's resistance to flow.
b)
A liquid's ability to flow.
c)
A liquid's flowing speed.
d)
The measurement of time it takes a solid to change to a liquid.
21.
The pH scale is a range from:
a)
1-7
b)
0-14
c)
1-14
d)
1-20
22.
___________________ are the elements or compounds that are formed or produced in a chemical reaction.
a)
Polymers
b)
Bonds
c)
Reactants
d)
Products
23.
A change in which NEW substances are formed.
a)
Chemical change
b)
Physical change
c)
Casual change
d)
Formal change
24.
_________________ are the elements and compounds that react, or start, in a chemical reaction.
a)
Polymers
b)
Bonds
c)
Reactants
d)
Products
25.
Which of the following could indicate a chemical change?
a)
All of the answers could indicate Chemical Change
b)
a color change has occurred
c)
bubbles appear
d)
a precipitate formed
26.
A copper penny turning greenish after a few years is an example of...
a)
Chemical Change
b)
Physical Change
27.
Which of the following is a PHYSICAL change?
a)
Getting a haircut
b)
Rusty metal
c)
sour milk
d)
A compound
28.
What is the law of conservation of mass?
a)
The part of the universe being studied
b)
The rest of the universe that interacts with the system
c)
Mass/matter cannot be created or destroyed, it can just change form
d)
A system that freely exchanges matter and energy
29.
Evidence of a chemical reaction include:
a)
Phase change
b)
No new substance
c)
Bubbles forming
d)
Shape change
30.
No Definite Shape and No Definite Volume
a)
Gas
b)
Liquid
c)
Solid
31.
Definite shape and a definite volume.
a)
Gas
b)
Liquid
c)
Solid
32.
No definite shape, but has a definite volume
a)
Gas
b)
Liquid
c)
Solid
33.
Phase change from a solid to a gas.
a)
sublimation
b)
deposition
c)
condensation
d)
evaporation
34.
Phase change from a solid to a liquid.
a)
melting
b)
sublimation
c)
boiling
d)
condensation
35.
A measure of the average kinetic force an object has (how fast the molecules are moving).
a)
temperature
b)
motion
c)
speed
d)
velocity
36.
What does this instrument measure?
a)
Mass
b)
Density
c)
Weight
d)
Volume
37.
What is the name of this instrument?
a)
Beaker
b)
Flask
c)
Graduated Cylinder
d)
Tuber
38.
Which of the following causes a solid to change to a liquid?
a)
the freezing point
b)
evaporation
c)
cold
d)
heat
39.
In which state of matter are molecules moving the fastest?
a)
solid
b)
liquid
c)
gas
d)
the molecules move equally fast in all states of matter
40.
True or False: Are weight and mass the same thing?
a)
True
b)
False
41.
Which of these substances is not an element?
a)
water
b)
aluminum
c)
hydrogen
d)
iron
42.
Formation of a precipitate is usually evidence of
a)
the separation of a mixture
b)
a chemical change
c)
the formation of a mixture
d)
a physical change
43.
Density, boiling point, color, shape, conductivity, malleability are all _________
properties
properties
a)
physical
b)
chemical
c)
simple
d)
elemental
44.
Sugar is dissolved in water. Water is the ________ and sugar is the __________
a)
solvent, solute
b)
solute, solvent
c)
solvent, dissolver
d)
solute, dissolved
45.
Solutions where the components are not mixed evenly.
a)
Homogeneous mixtures
b)
Suspension
c)
Heterogeneous mixtures
d)
Heterogeneous mixtures and suspensions
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