Download 8th grader and Energy

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5th Grader?
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Grade Topic 1
Grade Topic 2
Grade Topic 3
Grade Topic 4
Grade Topic 5
Grade Topic 6
Grade Topic 7
Grade Topic 8
Grade Topic 9
Grade Topic 10
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5th Grade Topic 1 Question
What
is potential and Kinetic Energy
and give an example
Topic 1 Answer
Kinetic Energy is energy of motion
EX: swing a bat
Potential Energy is stored energy
Ex: diver poised to jump in the water
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Topic 2 Question
Give
the definition of The Law of
Conservation of Energy
Topic 2 Answer
Energy
can’t be created or destroy.
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Topic 3 Question
A
piece of wood has a mass of 8.5 kg
and is at rest on the top of a 100m
hill. What is the weight?
Show
all three steps
Topic 3 Answer
Wt=
m*g
Wt= 8.5kg * 9.8m/sec2
Wt= 83.3 N
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Topic 4 Question
A
piece of wood has a mass of 8.5 kg
and is at rest on the top of a 25m hill.
How much Gravitational Potential
Energy does it have on top of the hill?
**
Need three steps
Topic 4 Answer
GPE=
M *G *h
GPE= 8.5kg * 9.8m/sec2 * 25m
Or GPE= 83.3N * 25m
2082.5 J
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Topic 5 Question
If
the piece of wood is thrown off
the hill so it falls at a velocity of
4m/s, what is its Kinetic Energy?
Three
steps
Topic 5 Answer
KE
= M *V2 divided by 2
KE = 8.5kg * 4squared m/s = 16 * 8.5

2
2
KE= 136/2
KE=
68 J
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Topic 6 Question
Give
an example for the following
Energy Conversions:
 a) PE
 KE
and

b) KE 
PE
Topic 6 Answer
A.
Water going over a water fall/glass
falling off the table
b)
Throw a ball straight up
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Topic 7 Question
Where is the greatest potential energy?
8
4
3
2
1
5
9
6
7
7
10
Topic 7 Answer

#4 and #8
8
4
3
2
1
5
9
6
7
7
10
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Topic 8 Question
Where
energy?
is the greatest kinetic
8
4
3
2
1
5
9
6
7
7
10
Topic 8 Answer
#1,
#7, #9
8
4
3
2
1
5
9
6
7
7
10
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Topic 9 Question
List
the 5 main forms of energy and
their definitions.
Topic 9 Answer
Mechanical- result of motion
Heat- due to the internal motion
of
particles
Chemical- found in the bounds that holds
atoms together
Electric magnetic- moving electrical
charges
Nuclear- released when the nucleus of an
atom splits/ fuses
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Topic 10 Question
Name
the three energy
transformations that occur in
everyday life.
Topic 10 Answer
Conduction
Convection
Radiation
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Million Dollar Question
Topic 11
1,000,000 Question
Explain
how two energy
transformations occur in your life.
1,000,000 Answer
rubbing hands together
Mechanical

heat

 moving hands
Burning
wood
Chemical

friction heats up hands
stored in wood
 electromagnetic
light (light produced)