Transcript 5 forms of energy

TOPIC: Energy
AIM: Describe the five forms of energy.
Do Now: Let’s go over the HW ditto
http://www.brainpop.com/science/energy/formsofen
ergy/
HW: Periodic table Activity – Due Monday
Reminders:
- Chemistry Castle learning due Tuesday
- Atom Drawing/Model due Friday
- Chemistry test on Tuesday
5 forms of energy
Mechanical • Energy in moving
Energy
things
Heat
Energy
• Thermal Energy
• Energy in moving
particles of matter
• Faster  more heat energy
produced
• Usually results from friction
• Causes changes in
temperature & phase (solid,
liquid, gas)
Almost everything changes to
heat energy.
Thermal • Most substances expand
expansion when their temp is
increased
• Ex:
1. Sidewalks have spaces bw squares of
concrete bc concrete expands in hot
weather
2. Hot air balloons are heated. Its volume
increases which causes the balloon to
expand.
Chemical • Energy that holds
matter together (in
Energy
bonds)
H
H
O
Bond
• Bonds broken chemical
energy released
• Food, batteries, fuels (coal &
wood), unlit match
Electrical
Energy
• Energy in moving
electrons
• Can travel through a
vacuum (no air)
• Examples: electricity, light
Nuclear • Energy stored in
nucleus of an atom
Energy
Mechanical
Mechanical
Heat
Flashlight = converts chemical
energy (stored in the battery)
to electrical energy to light
the bulb. The bulb converts
the electrical energy to
electromagnetic energy.
Toaster = converts
electrical energy into
thermal energy.
Car engine = converts the chemical
energy stored in the gasoline into
mechanical and thermal energy.
Radio = converts electrical energy
into sound energy.
Human body = converts
chemical energy stored in
food into mechanical
energy for a beating heart
and moving muscles.
Let’s summarize…
1. Identify the 5 forms of energy.
2. What is another name for heat energy?
3. Describe what occurs to particles as temperature
increases.
4. Describe what occurs to substances when their
temperature increases?
5. Where is chemical energy found? How is it
released?
6. Where is electromagnetic energy found? Give
one example.
7. Where is nuclear energy stored?
Windmills are used to convert wind energy to a more
useful form. In most cases, there are steps in this
process. The energy is in a different form in each
step. Which of the following flowcharts shows the
most likely order of the energy changes?
1. Wind energy  mechanical energy  solar
energy
2. Wind energy  thermal energy  mechanical
energy
3. Wind energy  solar energy  electrical energy
4. Wind energy  mechanical energy  electrical
energy
A family is moving from Pennsylvania to
Connecticut. As the moving van burns gasoline, it
converts
1. chemical energy into mechanical energy
2. kinetic energy into potential energy
3. thermal energy into electrical energy
4. mechanical energy into kinetic energy
When an electric current flows through a metal
filament of a light bulb, the electrical energy is
converted into
1. heat energy, only
2. heat and light energy
3. light and motion energy
4. light energy only
Which energy source was developed
through the invention of the atomic
bomb?
1. Nuclear
2. Geothermal
3. Solar
4. Hydropower
Which device produces mechanical energy?
1. A battery
2. A light bulb
3. An electric motor
4. A solar cooker
A song is playing on the radio. Which best
describes the change in the flow of energy?
1. Electrical energy  light energy
2. Electrical energy  sound energy
3. Sound energy  light energy
4. Sound energy electrical energy
As a river flows through a turbine in a
hydroelectric power plant, the potential
energy of the water behind the dam
changes to
1. chemical energy
2. nuclear energy
3. mechanical energy
4. radiant energy
A bicycle rider ate breakfast before the
ride. Which energy transformation
occurred during the bike ride?
1. Kinetic to chemical energy
2. Chemical to kinetic energy
3. Kinetic to nuclear energy
4. Nuclear to kinetic energy
Energy appears in many forms. Which
form of energy is lightening?
1. Magnetic
2. Mechanical
3. sound
4. Electrical