all energy we use comes originally from the sun. Fossil fuels are plant and
animal matter that decayed tens of millions of years ago and have been
compressed and heated turning into coal, oil and gases. Of course, plants get
energy from the sun and convert it through photosynthesis. Animals in turn eat
plants converting the stored energy into energy to keep themselves alive.
is created because of differential heating of land and water areas by the sun
creating movement of air from one area to another. Geothermal energy is residual
heat of the earth, which was created billions of years ago in the formation of
the earth and the solar system. So, we can trace all energy back to the
source...the nearest star, our sun.
is in everything. We use energy to do everything we do, from making a jump
shot to baking our favorite cookies to sending astronauts into space -- energy
is there, making sure we have the power to do it all
use all these energy sources to generate the electricity we need for our homes,
businesses, schools, and factories. Electricity
"energizes" our computers, lights, refrigerators, washing machines,
and air conditioners, to name only a few uses.
use energy to run
our cars. The gasoline we burn in our cars is made from oil.
We use energy to cook on an outdoor grill or soar in a beautiful hot-air
balloon. The propane
for these recreational activities is made from oil and natural gas.
are two types of energy -- stored (potential) energy and working (kinetic)
energy. For example, the food you eat contains chemical energy, and your
body stores this energy until you release it when you work or play.
comes in different forms -- heat (thermal), light (radiant), mechanical,
electrical, chemical, and nuclear energy.
forms of energy are stored in different ways, in the energy sources that we use
every day. These sources are divided into two groups-- renewable (an energy source that we can use over and over again)
and nonrenewable (an energy source that we are using up and cannot recreate in a short period of
time). Renewable energy sources include solar energy, which comes from the sun and can be turned into
electricity and heat. Wind, geothermal energy from inside the earth,
biomass from plants, and hydropower from
water are also renewable energy sources.
Renewable Sources of Energy
Conduction, Convection, and Radiation
Wonderville Game (ignore message that pops up)
Power Up Game
Energy Quiz (give it a try!!)
back to main index