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Worksheets08.01.25 Quiz
Total questions: 59
Worksheet time: 55mins
Which of the following materials is a conductor?
toothpick
paper clip
copper wire
rubber band
A moving car is a good example of what kind of energy?
light
chemical
gravitational
mechanical
pitch of a birds song is generated by the waves what?
wavelength
loudness
speed
intensity
Electrical current can only flow through a ___________ circuit.
open
positive
closed
The wavelength is defined as the distance or space between one (a) to another.
Match the following
1
Has a low pitch and vibration
2
Has the greatest amplitude
3
Has the greatest frequency
Understanding Mechanical Energy
Mechanical energy is the energy that an object has because of its motion or position. It is a combination of two types of energy: kinetic energy and potential energy. Kinetic energy is the energy of motion, which means that any object that is moving has kinetic energy. For example, a rolling ball or a running dog both have kinetic energy because they are in motion. The faster an object moves, the more kinetic energy it has.
Potential energy, on the other hand, is the energy stored in an object because of its position or condition. For instance, a book placed on a high shelf has potential energy because of its height. If the book falls, the stored potential energy changes into kinetic energy as it moves. Another example is a stretched rubber band, which stores potential energy that can be released when it snaps back to its original shape.
Mechanical energy can be seen in many everyday examples. A windmill uses the mechanical energy of moving air to generate electricity. A child on a swing has both kinetic energy when moving and potential energy at the highest point of the swing. Even a car driving on the road uses mechanical energy, combining the motion of its wheels and the stored energy in its fuel. Understanding mechanical energy helps us see how energy is used and transformed in the world around us.
What is mechanical energy?
Energy due to motion or position
Energy due to chemical reactions
Energy due to heat
Energy due to sound
Which of the following is an example of kinetic energy?
A book on a shelf
A rolling ball
A stretched rubber band
A windmill at rest
What happens to potential energy when a book falls from a shelf?
It remains the same
It changes into kinetic energy
It disappears
It increases
What type of energy does a stretched rubber band have?
Kinetic energy
Potential energy
Thermal energy
Electrical energy
How does a windmill generate electricity?
By using mechanical energy of moving air
By using chemical energy of fuel
By using thermal energy of the sun
By using electrical energy stored in batteries
A child is on a playground swing, going back and forth. At what point in the swing’s motion is the child’s kinetic energy at its minimum and potential energy at its maximum?
At the very bottom of the arc.
When the swing is at the highest point on either side.
Just as it passes through the middle.
A race car travels in a straight line at constant speed, then enters a wide, flat turn without changing speed. How would you describe the two motions?
Both are examples of rectilinear motion.
The straight section is linear, and the turn is rotational.
The straight section is linear; the turn is curvilinear because the car’s direction is changing.
Which of the following items would be the best electrical conductor?
A piece of chalk
A cotton shoelace
A steel fork
A ceramic mug
Which choice is the safest electrical practice?
Plugging a space heater into an extension cord.
Unplugging a toaster by pulling the plug, not the cord.
Using a power strip that feels warm to the touch.
Replacing a broken plug by twisting wires together.
A musician is tuning a string instrument. To produce a note with a higher pitch, what should they do?
Pluck a thicker string gently.
Pluck a thinner string gently.
Loosen the string to make it longer.
Tighten the string to make it vibrate faster.
During a thunderstorm, you see lightning flash, and several seconds later you hear thunder. Why does this happen?
Thunder is produced after the lightning has finished.
Your brain processes sight faster than sound.
Light travels through the air much faster than sound.
Sound is slowed down by the rain in the air.
Imagine a boulder resting on a cliff, then falling off. As it falls toward the ground (ignoring air resistance), how do its kinetic and potential energies change?
Both its kinetic and potential energy increase.
Its potential energy decreases and its kinetic energy increases.
Its potential energy increases while its kinetic energy stays the same.
Two submarines can use sonar to communicate underwater. Why can’t two satellites in space, the same distance apart, communicate by yelling?
There is no air in space to carry the sound waves.
Space is too cold for sound to travel.
Sound in space travels in the wrong direction.
The satellites’ engines make too much noise.
A windmill spinning in the breeze is an example of energy conversion involving which type?
Chemical energy
Nuclear energy
Sound energy
Mechanical energy
A student builds the circuit below using a battery, wires, and a buzzer, but the buzzer doesn’t sound. The circuit has a gap with a plastic comb across it. What is the main problem?
The circuit has no energy source.
The plastic comb is an insulator, so the circuit is open.
The buzzer is using all the electricity.
The wires are made of the wrong metal.
What property of a sound wave determines whether you hear it as a high note or a low note?
Its amplitude
Its wavelength
Its frequency
Its speed through the air
Which term means the ability to do work or cause change?
Force
Energy
Motion
Friction
Kinetic energy is best described as:
Energy an object has because it is moving
Stored energy an object has because of its position
Energy from the movement of charged particles
A push or a pull on an object
Which term refers to movement in a straight line?
Curvilinear motion
Linear motion
Circular motion
Vibrational motion
What is a push or a pull that can change the motion of an object?
Friction
Force
Energy
Volume
Electricity is defined as:
A build-up of charge that stays in one place
A form of energy from the movement of charged particles
A complete path for electricity to flow
A material that does not allow electricity to flow
Which term means a complete path for electricity to flow?
Electric circuit
Series circuit
Parallel circuit
Resistor
A parallel circuit connects components in:
One straight line
Multiple paths
A single loop only
No closed path
Match each electricity term to its definition.
Conductor
A material that allows electricity to flow through it easily
Insulator
A material that does not allow electricity to flow through it easily
Resistor
A material that slows down the flow of electricity
Which term describes a vibration that travels through a medium and can be heard?
Pitch
Sound
Frequency
Amplitude
Which simple machine has slanted sides used to split or cut?
Wedge
Screw
Wheel and axle
Lever
Select the terms that describe parts of a lever system.
Fulcrum
Pulley
Lever
Resistor
What happens to kinetic energy as a roller coaster car goes down?
It decreases
It stays the same
It increases
It disappears
What is mechanical energy a combination of?
Potential energy and thermal energy
Kinetic energy and thermal energy
Potential energy and kinetic energy
Thermal energy and sound energy
At which point are kinetic and potential energy equal?
Point 1 & 5
Point 2 & 4
Point 1 & 2
Point 4 & 5
The law on conservation states ____________.
that energy cannot be created or destroyed
energy can be destroyed
energy can be created, but not destroyed
Match the following different forms of energy.
thermal
mechanical
Electrical
sound
Which letter represents the crest?
A
B
C
D
The two waves have different...
amplitudes
speeds
wavelengths
frequencies
Simple machines can make work easier by reducing the input force needed to move an object. However, there is a trade off for decreased input. What is the trade off?
The distance the object is moved is increased.
The distance the object is moved is decreased.
The amount of work is increased.
The amount of work is decreased.
A simple machine is a device that helps to reduce the amount of _____ required to work. Machines make work easier.
A simple machine that splits an object apart is a _______.
inclined plane
fulcrum
wedge
lever
A bowling ball, ping pong ball and tennis ball is rolling down a hill. Which has more kinetic energy?
Bowling Ball
Ping Pong Ball
Tennis Ball
Which material is considered an insulator?
Copper wire
Aluminum foil
Plastic coating
Steel nail
What type of energy is stored in a stretched rubber band?
Kinetic energy
Potential energy
Thermal energy
Sound energy
Which simple machine is used to lift a flag on a flagpole?
Wedge
Inclined plane
Pulley
Lever
How is potential and kinetic energy inversely related?
Both decrease at the same time
Both increase at the same time
As one increases the other decreases
Why won't the light bulb turn on?
The wire is not connected to the source.
It is a closed circuit so the electricity cannot flow
The wire does not have a conductor
It is not a closed circuit, with no electric current
Organize these options into the right categories
Magnetic Force
Gravitational Force
Friction
Tension Force
Spring Force
In the vacuum of space, there is no (a) such as air or water to carry sound vibrations. Therefore, if an astronaut shouts, another nearby astronaut will not hear it, because sound cannot travel through a (b) .
Define potential and kinetic energy and how they are related
Which term means the ability to do work or cause change?
Draw a curvilinear and linear example. Label
Electricity is defined as:
A build-up of charge that stays in one place
A form of energy from the movement of charged particles
A complete path for electricity to flow
A material that does not allow electricity to flow
Draw a scientific simplified parallel circuit. Label the drawing.
Match each electricity term to its definition.
Conductor
A material that allows electricity to flow through it easily
Insulator
A material that does not allow electricity to flow through it easily
Resistor
A material that slows down the flow of electricity
Select the terms that describe parts of a lever system.
Fulcrum
Pulley
Lever
Resistor
Match the following different forms of energy.
thermal
mechanical
Electrical
sound
Look at the pictures of objects below and their current charge. Which picture shows objects that will most likely attract one another?
