Energy Transformations
Notes on Thermal Energy:
related to temperature
What gives off radiant energy?
stars
what is energy?
the ability to cause change
It's everywhere and abundant, yet we can't
touch it and it has no mass.
name 4 examples of infrared radiation
ultraviolet radiation X-rays gamma rays radio waves
What is an example of GPE?
water at the top of a waterfall
visible light=
wavelengths that we can see it with our eyes
infrared radiation=
wavelengths that we can't see with our eyes
How does Nuclear energy occur?
when the nuclei of atoms change
Chemical energy is sometimes called fuels that when heated could possibly explode ex)
wood natural gasses gasoline coal etc.
Radiation =
atoms absorbing energy from outside source and then release energy as electromagnetic radiation
The 6 forms of energy are: + any others that you can think of...
chemical mechanical radiant electrical thermal nuclear electromagnetic
What are 3 examples of energy transformations?
chemical energy in a battery is transformed into mechanical energy (the motion of the toy) The chemical energy in the wood is transformed into thermal energy (fire) and Radiant energy (light) The chemical energy in the apple is being transformed into mechanical energy (running).
Energy Transformation Example of a car driving down the street
chemical energy in the gas tank to mechanical energy (the motion of the car).
Input/output of each item Toaster Flashlight Blender Battery-operated clock
electrical to thermal chemical to light electrical to sound chemical to sound
Provide an example of each type of energy below: Chemical Energy Electrical Energy Gravitational Potential Energy Thermal Energy Electromagnetic Energy
gas in a car Batteries in a car car from top of hill coffees heat radio waves
Other uses for Nuclear Energy.....
medicine, radiation therapy, submarines, ships, and takes up little space.
What does energy produce?
motion, heat, and light...
Give their 4 examples of KE (energy at work):
a lawn mower cutting grass a car racing down a hill students running home from school a pendulum
List the 3 examples of PE given here:
a lawn mower filled with gasoline a car at the top of a hill students waiting to go home from school
what is the most familiar form of energy
Mechanical
Everything that has motion has ________
Mechanical energy
If the little girl stops swinging her legs, will she swing forever? Why or why not? Where did the energy from the initial push go?
Mechanical energy from push transforms into thermal energy from friction
What has chemical energy in it?
Photosynthesis
Energy can be divided into 2 large categories:
Potential and kinetic
Electrical Energy is carried by moving electrons cannot be seen, but one of most useful forms and is... (sorry)
Relatively easy to transmit and use
The Law of Conservation of Energy
A. Energy can change from one form to another but the total amount of energy in a system remains constant B. Energy cannot be created nor destroyed
What is chemical energy?
Energy stored in bonds between atoms and molecules
POWER PLANTS =
Chemical Energy -------> Thermal Energy + Mechanical Energy
BURNING WOOD =
Chemical Energy to Thermal Energy (heat) and Radiant Energy
Michael Phelps eats about 12,000 calories of food a day. What energy transformation is taking place ?
Chemical energy to mechanical or kinetic energy
A model rocket uses a flammable fuel to power its flight into the air. What energy transformation takes place in the rocket?
Chemical energy to thermal energy
List five examples they give that show we are using energy:
Getting up Going to school Doing chores Eruption of volcanoes Speeds sprouting
Mechanical energy what is mechanical energy? Which big category does it fall under?
The ability to do move/move both
In physical science, energy means?
The ability to do work.
When enough heat is added (explain)
When you add enough heat the particles will accelerate and become a gas.
What are energy transformations?
a change in energy from one form of energy to another
What does WORK mean?
a change in: position, speed ,state or form of matter .
