Types of Energy
Energy is ______________________________.
the ability to do work or cause change
Claudia accidentally hits her garbage can while she is backing her car out of the driveway. The garbage can falls and rolls down the street.
Describe the transfer of energy that took place.
The kinetic energy from the moving car is transferred to the garbage can. The kinetic energy causes the garbage can to move.
What form of energy is released when someone turns on a flashlight?
light energy
What is the role of a battery in an electric circuit?
The battery is the source of energy.
What is the energy of motion?
kinetic energy
Laura and Francesco were playing catch in Laura's front yard. Laura threw the ball to Francesco, but he missed it. The ball hit a nearby car and left a small dent in the side of the car.
Describe the transfer of energy that caused the car to dent.
The kinetic energy of the baseball was transferred to the car.
Oven's transform _____________ energy into ______________ energy.
electrical energy, heat energy
Electricity is the flow of ______________.
electrons
What is sound energy caused by?
vibrations
Aaron Judge warms up for baseball games by participating in batting practice. One time he hit the ball so hard that it left his bat at a speed of 118 mph. What will happen to the speed of the ball when it hits the batting practice net? Why will this happen? (explain the transfer of energy)
The speed of the ball will decrease (slow down). This will happen because some of the kinetic energy the ball had will be transferred to the net.
Describe a situation in which electrical energy is transferred to heat and sound energy.
ex: using a hair dryer
Why do electricians wear cloth or rubber gloves?
Electricians wear cloth or rubber gloves because cloth and rubber are insulators. They will protect the electrician and allow him/her to touch electrical wires without getting shocked.
List 4 types of energy (100 pts each).
light, sound, heat, potential, kinetic
A child is bowling. She knocks down all of the pins and earns a strike. Explain the transfer of energy that occurs when...
1- The girl throws the bowling ball down the lane.
2- The bowling ball hits the pins.
1- Before the girl throws the ball, the ball has potential energy. Once the ball is thrown, the potential energy transforms into kinetic energy.
2- The kinetic energy in the bowling ball is transferred to the pins. It is transformed into kinetic energy (the pins fall) and sound energy (we hear the pins hit the floor and each other).
A boy turns his TV on. The ____________ energy used to power the TV is transformed into ____________ energy and ____________ energy.
1- electrical
2- light (or sound)
3- sound (or light)
Why are wires made of metal? (200 pts)
Why are metal wires coated/covered with plastic? (200 pts)
1- Wires are made of metal because metals are conductors. Conductors allow electricity to pass through them easily and wires need electricity to pass through them.
2- Metal wires are coated/covered with plastic because the plastic insulates the wire. It prevents electricity from passing through the sides of the wire.