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WorksheetsElectricity and Heat Review
Total questions: 14
Worksheet time: 28mins
A fan is plugged into an extension cord. The extension cord is plugged into a wall outlet. How does the extension cord help the fan work?
The extension cord makes the fan more powerful.
The extension cord makes the fan easier to operate.
The extension cord transfers sound energy to the fan.
The extension cord transfers electric currents from the outlet to the fan.
An electric fence used to contain cattle works by transmitting energy through a conductor creating an electric ___________.
current
ripple
wave
A flow of electrical charges is known as _________.
resistance
electrical current
static electricity
voltage
In an electric circuit, a battery can act as a __________.
voltage source
conductor
insulator
resistor
A conductor is a ___________.
a material that increases the number of charged particles
material that increases the amount of electricity
material through which electricity flows easily
material that stops the flow of energy
You are asked to design a product that will change electrical energy to heat energy. Choose the item you would research while developing your product.
Hair dryer
Alarm clock
Ceiling fan
Cell phone
Amy touched a machine called a Van de Graaf generator. When she touched the generator all of her hair on the top of her head stood up. When she removed her hand from the generator, her hair fell back to its normal state. What conclusion can you draw from Amy touching the generator?
Charged particles are being pulled from the air.
Charged particles are being pulled from the floor.
Charged particles are being destroyed.
Charged particles are being moved from one object to another.
A switch in a circuit__________.
acts as an insulator
absorbs electricity
allows or stops the flow of electricity
keeps the flow of electricity at a safe level
An object in an electrical circuit that resists the flow of energy is called
a magnet
a compass
a voltage
a resistor
A farmer needed to keep his baby chicks warm. He placed a light in their cage. Which sentence best explains the farmer's thinking of placing a light in the cage?
The farmer thought the light would transfer thermal energy to the chicks' cage.
The farmer thought that the chicks would be healthier if they were not in the dark.
The farmer thought that the chicks would eat more to stay warm if they can see their food.
The farmer thought that the light would encourage the chicks to huddle together to keep themselves warm.
A ________ transfers heat easily.
conductor
insulator
In the image to the left, what evidence can you gather to prove that energy is being transferred?
The smoke shows that the grill is transferring heat energy to cook the food.
The smoke shows that the grill is transferring sound energy to cook the food.
The smoke shows that the grill is transferring electrical energy to cook the food.
The smoke shows that the grill is transferring mechanical energy to cook the food.
You are watching fireworks on the fourth of July. When the fireworks are set off, they give off three forms of energy. Which three forms of energy are given off?
light, sound, electrical
light, sound, heat
sound, electrical, mechanical
heat, mechanical, electrical
It is summer and very hot outside. You walk barefoot on hot pavement to get to your pool. Predict what will happen in this scenario.
The transfer of heat energy from the pavement will cause your feet to feel hot.
The transfer of light energy from the pavement will cause your feet to feel hot.
The transfer of light energy from the pavement will cause your feet to feel cold.
The transfer of heat energy from the pavement will cause your feet to feel cold.
