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WorksheetsEndothermic vs. Exothermic Changes
Total questions: 32
Worksheet time: 22mins
Name
Class
Date
1.
What type of reaction occurs in a hand warmer
a)
exothermic
b)
endothermic
2.
Is the combustion of gasoline endothermic or exothermic?
a)
Endothermic
b)
Exothermic
3.
Is photosynthesis an exothermic or endothermic reaction?
a)
Endothermic
b)
Exothermic
4.
During an endothermic reaction in a beaker if we are part of the surroundings and touched the beaker, it would feel _______.
a)
Warm
b)
Cold
5.
Is cellular respiration an Endothermic or an Exothermic reaction?
a)
Endothermic
b)
Exothermic
6.
In an endothermic reaction, heat is ...
a)
taken in or absorbed
b)
given out or released
7.
In an exothermic reaction, heat is ...
a)
taken in or absorbed
b)
given out or released
8.
Baking bread and cooking an egg are examples of....?
a)
Endothermic processes
b)
Exothermic processess
c)
None of these
9.
When you freeze water, it turns to ice. What kind of change is this?
a)
Physical
b)
Chemical
10.
When a substance melts, the kinetic energy _____________.
a)
decreases
b)
stays the same
c)
increases
d)
decreases then increases
11.
When molecules flow around each other, they are in this phase
a)
solid
b)
liquid
c)
gas
d)
plasma
12.
What takes place when a liquid changes to a gas?
a)
condensation
b)
melting
c)
evaporation
d)
freezing
13.
What takes place when a solid changes to a liquid?
a)
condensation
b)
melting
c)
evaporation
d)
freezing
14.
What is the average kinetic energy of a substance called?
a)
volume
b)
temperature
c)
pressure
d)
movement
15.
What takes place when a gas changes to a liquid?
a)
melting
b)
freezing
c)
evaporation
d)
condensation
16.
What takes place when a solid changes to a liquid?
a)
condensation
b)
freezing
c)
melting
d)
evaporation
17.
Are there molecules moving in a solid brick?
a)
yes
b)
no
c)
maybe
d)
not sure
18.
What happens to molecules when kinetic energy increases?
a)
they move slower and decrease temperature
b)
they move faster and increase temperature
c)
they get heavier and do not impact temperature
d)
it depends on the types of molecules
19.
What state of matter is X?
a)
solid
b)
liquid
c)
gas
d)
supercritical fluid
20.
What state of matter is Y?
a)
solid
b)
liquid
c)
gas
d)
supercritical fluid
21.
What state of matter is Z?
a)
solid
b)
liquid
c)
gas
d)
supercritical fluid
22.
What change occurs from F to E?
a)
sublimation
b)
deposition
c)
melting
d)
condensation
23.
What change occurs from E to C?
a)
sublimation
b)
freezing
c)
melting
d)
boiling
24.
What change occurs from C to D?
a)
condensation
b)
vaporization
c)
melting
d)
sublimation
25.
Which line segment demonstrates vaporization occurring?
a)
B-C
b)
C-D
c)
D-E
d)
E-F
26.
What phase change is occurring at line segment B-C if the graph is exothermic?
a)
melting
b)
freezing
c)
boiling
d)
condensation
27.
At what temperature is this substance melting?
a)
50C
b)
100C
c)
0C
28.
The temperature at which a substance in the liquid state freezes is the same as the temperature at which the substance_________-
a)
melts
b)
sublimes
c)
boils
d)
condenses
29.
Phase change going from a Gas to a Solid...
a)
Deposition
b)
Sublimation
c)
Condensation
d)
Vaporization
30.
Is the substance gaining or losing energy?
a)
Gaining
b)
Losing
31.
Is the substance gaining or losing energy?
a)
Gaining
b)
Losing
32.
Where on the graph are phase changes taking place?
a)
1
b)
2
c)
3
d)
4
e)
5
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