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Unit 12: Alternative Energy Page 11 of 31
Textbook Reading
Lesson 1: Basics of your guide to doing, observing,
Alternative Energy and thinking about your
environment.
Earth, our home in space, has By understanding our environment,
supported life for a long time. But we can learn to protect the earth
with a growing human population, and to use our natural resources
people are having a greater effect wisely for generations to come.
on the environment than ever
before. Together we must learn Atoms and Molecules
about the problems facing our
environment and work to protect Understanding something about
the earth. atoms and molecules will help you
understand our environment.
There are many ways we can work
together to protect the earth. We Everything in the world around us
can ask adults to use more fuel- is made of atoms and molecules.
efficient cars (cars that get more We talked about this in Units 3 and
miles per gallon of gasoline). We 8 extensively, but here’s a quick
can ride bikes or walk instead of review:
getting rides in cars. We can
recycle aluminum, paper, plastic, Atoms are the basic building
and glass, and we can plant trees. blocks of all things. There are
We can save energy by turning off about 100 different kinds of atoms.
lights when they are not in use. We Molecules are combinations of
can save energy by not keeping tightly bound atoms. For example,
rooms and buildings too hot in the a water molecule is a combination
winter or too cold in the summer. of two hydrogen atoms and one
Another way we can help the earth oxygen atom.
is to learn more about the
environment. Molecules that are made of only a
few atoms are very small. Just one
This lesson is designed to help you drop of water contains about two
better understand our environment million quadrillion
by doing experiments with air, (2,000,000,000,000,000,000,000)
water, land, energy, and life. It’s water molecules.
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