Energy
The ability to make things move or change.
Unit that energy is measured in
Joules (J)
All energy can be categorized into the two following categories:
Potential and Kinetic Energy
Wind energy is harnessed using these large structures that convert kinetic energy from the wind into electrical energy.
What are wind turbines
The process chain from the primary energy source to the final energy to supply a service.
What is an Energy System.
Energy that depends on an object's motion.
What is Kinetic Energy.
If a ball is thrown up, what happens to its kinetic energy as it reaches the peak of its trajectory?
It transforms into potential energy
An example of an Energy Transformation:
Human Body: Chemical Energy from (food) ---> Mechanical Energy (movement)
Electric Fan: Electrical Energy ----> Kinetic Energy (motion of fan)
Solar Panel: Light Energy (sun) ----> Electric Energy (solar panels)
Battery: Chemical Energy (stored in a battery) ---> Electrical Energy (when used in a device such as a phone)
An energy source that cannot be replenished in a short period of time (coal, natural gas, oil, and nuclear energy).
What is a Non Renewable Energy Source.
What energy transformation occurs during the process of a car engine burning gasoline
What is chemical energy transforming into mechanical energy.
Energy that depends on an object's position.
What is potential energy (PE).
Kinetic Energy depends upon
mass and velocity
Changing of energy from one form to another form.
What is Energy Transformation.
Energy sources that are naturally replenishing but limited by the availability of the resource (Solar, Wind, Water).
What is a Renewable Energy Source.
Energy cannot be created nor destroyed. Energy can only be transferred from one object to another, or transformed from one type of energy to another.
What is the Law of Conservation of Energy.
m * g * h
What is the equation for potential energy
Potential Energy depends upon
mass and height
This type of energy is associated with the stored energy in bonds of atoms.
What is chemical energy (potential energy)
A natural resource that can be harnessed to produce energy.
What is a primary energy source.
In an ecosystem, energy is transferred from one organism to another through food chains. What is the primary source of energy for this system?
What is the sun?
0.5 * m * v2
What is the equation for kinetic energy.
The potential energy of a 50 kg rock teetering on the edge of a cliff is 15,000 Joules (J). How high was the rock to have had this much potential energy? (Don't forget units!)
What is 30 meters
In a battery-powered toy, chemical energy is transformed into this type of energy that makes the toy move.
What is mechanical energy? (kinetic energy)
Hot coffee being cooled down from cold milk being poured in is an example of:
Thermal Energy Transfer
Describe the complete energy system involved in turning on a light at EHS.
Primary Energy Source: The sun or Power Plant
Energy Generation: A generator harnesses the energy and transforms it into electrical energy.
The electrical energy travels through power lines to the school.
When the electrical energy reaches the lightbulb, it is transformed into Light Energy, where the bulb emits visible light.