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Unit 12: Alternative Energy Page 9 of 31
Objectives
Since alternative energy As you sit there reading this, there
experiments in this area require is energy flowing all around you in
power plants and machinery the the form of light waves, sound
size of a small town, we're going to waves, radio waves, heat and
focus on a very specialized form of more. You are constantly being
alternative energy called bombarded by energy. Energy is
Renewable Energy. everywhere, all the time. We’re
going to learn how to tap into the
Renewable energy is the energy potential that's all around you.
created from natural sources, like
sunlight, water, wind, and Highlights:
temperature differences
(geothermal). We'll be making A solar cell converts sunlight
solar-powered robots, build solar straight into electricity.
batteries, light up bulbs using a Solar cells are usually made
blast from a hair dryer, and
capture the energy in light waves of silicon.
on our battery-free radio. Light (photons) hit a solar
cell and get absorbed,
We're also going to study the
energy locked in substances by knocking electrons out of
learning how to split the water their shell, which start
molecule and extracting the energy flowing through the silicon to
using fuel cells and create DC current.
electrochemistry. We'll also have a
peek at the power from steam and A propeller placed in a
how apples can power your clocks. moving fluid will turn a motor
shaft (which has coils of wire
How many of these things do you and magnets inside). The
remember from our previous faster the shaft turns, the
lessons? more the magnets create an
electrical current.
Energy is the ability to do
work. The source of power in an AM
Work is moving something (crystal) radio comes directly
against a force over a from the radio waves
distance.
Power measures how quickly themselves.
work can be done. Molecules can also be split
chemically, or by getting hit
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