Download Chemical potential energy → electrical energy

Energy
Energy Equations
• Remember the Law of Conservation of
Energy?
• Well energy equations show how this energy
is transformed e.g. Battery
• Chemical potential energy → electrical energy
• E.g Toaster
• Electrical energy → Heat energy + light energy
Answer these energy equations
• In your notebook complete these energy
equations:
• Flying Airplane
• Light bulb
• Moving Car
• Computer
Remember that energy is transformed (changed)
Into different forms.
It can be transferred (moved to) different objects.
Answers to energy equations
• Flying Airplane
Chemical potential energy → Kinetic+Heat+Sound
• Light bulb
Electrical energy → Heat+Light Energy
• Moving car
Chemical potential energy → Kinetic+Sound+Heat
• Computer
Electrical energy → Heat+Light+Sound energy
Energy words!
• The following words are words you need to know
for this topic:
Joules – unit of measurement for energy
Watt – unit of measurement for power
Kinetic energy – energy of moving objects
Chemical energy – energy in food and fuels
Electrical energy – most useful form of energy
Friction – a force that opposes motion. Friction
can cause energy to be lost as heat and sound.
Perpetual Motion
• YouTube - Perpetual Motion machine
• This is a machine that continues to move once
set in motion – forever! Is this possible?
Why/why not.
• Take some time to think this out, after you
have an idea share with your partner.
• (Think, pair, share)
Are you cold?
• What is hypothermia?
• This is when our body temperature is lowered.
Warm blooded animals require a constant body
temperature for their bodies to carry out life
processes. Humans have a body temperature of
37⁰C. If this is lowered by only 1 – 2 ⁰
hypothermia starts to set in.
• Once this process sets in shivering sets in, this is
the bodies way of trying to convert chemical
energy to kinetic and heat energy to try to raise
the body temperature.
Renewable/Non-renewable
• Fossil fuels such as coal, oil and natural gas are
non-renewable forms of energy.
• http://www.umich.edu/~gs265/society/fossilf
uels.htm
• What are two reasons why fossil fuels are not
a good source of energy?
1. Non-renewable
2. Create pollution