Energy
Energy is very important. It can
never be destroyed or created. When energy is used it simply transforms into a
different type of energy. An example of a transfer of energy is when you throw
a ball straight into the air, the kinetic energy in the ball transfers into
potential energy when the ball reaches its peak.
(In the
picture below the man is releasing energy through heat.)
There are two basic groups of energy,
renewable energy and nonrenewable energy. The United States produces half of
its electricity from coal, a nonrenewable type of energy. A renewable source of energy, a light bulb,
uses only 10% of its energy to create light. The other 90% of the energy is
converted into heat.
(In the
picture above you can see two types of energy being transformed into different
types)
Energy is important because it
allows work to be done. Without energy it would be impossible to move
anything. Energy affects all things. Two
of the main types of energy are Kinetic and potential energy. Kinetic energy is
the amount of energy in objects that move. An example of Kinetic energy is when
a car is driving down the road. Potential energy is the amount of energy an
object has depending on its position. An example of potential energy is an
apple hanging on a tree. I will leave you with a question, if you throw a ball
at a wall, where does the energy go after the ball hits the wall?
No comments:
Post a Comment