This final exam for 8th grade Physical Science covers key concepts from chapters 8, 9, and part of 10. It tests students' understanding of work, mechanical advantage, and efficiency through practical problems, ensuring readiness for advanced topics.
Wedge
Wheel and axle
Pulley
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Law of conservation of energy
Periodic law
The kinetic law
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nuclear energy
Sound energy
Electrical energy
Wind energy
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Not this one
Still not this one
Defiantly this one: Mechanical Advantage
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Joule
Watt
Work
Power
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Wheel and axle
Pulley
Wedge
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Transferred
Destroyed
None of the answers
Created
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Machine
Machine
Machine
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Wedge
Pulley
Screw
Lever
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Shape
Height
Distance
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Fossil fuel
Mechanical energy
Solar energy
Wind energy
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Nuclear energy
Sun
Steam
Fossil fuel
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Newton
Joule
Watt
Joule per second
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Chemical change
Physical change
I cant think of another one right now: so its not this one
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Running down the court without a ball
Throwing the ball to a teammate
Dribbling the ball in place
Slam-dunking the ball
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Energy conversion
Both of the answers
Friction force
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Not related to the object's mass
The waste energy it produces by friction
The sum of its potential and kinetic energies
Its energy of motion
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Renewable
Nonrenewable
Nonenergy
None of the answers
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10
0
20
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Electrical energy
Light energy
Nuclear energy
Chemical energy
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Work Input
Work Output
Mechanical Effeciency
Mechanical Advantage
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Electrical
Light energy
Thermal energy
Waste
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Geothermal
Steam
Water
Fossil fuel
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The cars
The track
The air
All of the above
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Speed and mass
Distance and time
Volume and density
Weight and height
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Boiling
Burning
Freezing
Melting
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100 watt bulb
60 watt bulb
40 watt bulb
All bulbs do the same amount of work each second
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Thermal
Kinetic
Light
Potential
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Each state has the same kinetic energy
Gas
Liquid
Solid
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Lever
Compound machine
Ideal Machine
Wheel and Axle
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Wheel and axle
Pulley
Wedge
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10%
25%
95%
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Solid
Liquid
Gas
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Changes in size when done by machine
Changes in direction when done by machine
Changes in size and direction when done by machine
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Combine carbon dioxide with oxygen
Convert thermal energy into kinetic energy
Break down food molecules to release energy
Use light energy to produce new substances with chemical energy
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Solar energy
None of the answers
Gravitational potential energy
Kinetic energy
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Some energy is converted into thermal energy
Some energy is converted into light energy
Both a and b
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The substance have the same average kinetic temperature
Their particles will not react chemically
Their specific hears are identical
The substances have equal thermal energies
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An example of an inclined plane is a wedge
Inclined planes allow you to apply a smaller force over a smaller distance
Egyptian used inclined planes to build the Great Pyramid
A screw is a type of inclined plane.
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Sound energy: energy that can travel through a vacuum
Light energy: the result of vibrations of electrically charged particles
Electrical energy: the energy of moving electrons
Thermal energy: a measure of particle motion
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Sun
Steam
Geothermal energy
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Power
Work input
Work output
Efficiency
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The Input force
The Fulcrum
The Fulcrum, the load, and the input force
The load
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An object is moving after you apply a force to it
You exert a force that moves an object in the direction of the force
You do something that is difficult
You apply a force to an object
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Nuclear energy
Steam
Geothermal
Natural gas
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The heat inside the Earth
Plant matter
Falling water
Electric generator
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45 W
55 W
250 W
10 W
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Potential energy is zero
Kinetic and potential energy are equal
Potential energy is at maxium
Mechanical energy is zero
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