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[Interactive Quiz]
What is the best definition of “Energy”?
A. Energy is what it takes to drive our cars,
light our homes, and heat our houses.
B. Energy comes from the sun in the form
of radiation,.
C. Energy is a power over time
D. All of the Above
Answer: (D) Energy causes things
to move, run, change or happen. Energy can be transformed or changed
from one form to another. Each time energy changes form, some of
the energy is converted into heat energy and dissipated into the
environment. Energy has many uses. All people use energy and other
resources for their basic needs and to increase their material standard
of living. People use energy to heat and cool their homes, to run
their appliances, to power their cars, and to make goods and service.
Energy has become increasingly important to industrial societies
and has taken on a central role. There are renewable and nonrenewable
sources of energy. Each energy source has pros and cons environmentally
and economically that can and should be compared. |
The Sun is the source of almost all of our energy!
Physicists believe that in the center of the sun there is a constant
nuclear reaction happening. From crashing two hydrogen molecules
together a helium molecule is formed as well as a huge amount
of energy.
Great! So we are getting bombarded with energy from the sun,
but what is it?
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