2.  Energy
can be found in many
things, and takes many forms. There is
a kind of energy called kinetic energy
in objects that are moving. There is
something that scientists call potential
energy in objects at rest that will make
them move if resistance is removed.

4. Solar energy, radiant light and heat from the sun, is harnessed using a
range of ever-evolving technologies such as solar heating, solar
photovoltaics, solar thermal electricity, solar architecture and artificial
photosynthesis

5. 
A solar panel is a set of solar
photovoltaic modules electrically
connected and mounted on a
supporting structure. A photovoltaic
module is a packaged, connected
assembly of solar cells. The solar panel
can be used as a component of a larger
photovoltaic system to generate and
supply electricity in commercial and
residential applications

6. How wind generators works
Figures :

7. 
Wind power is the conversion of wind
energy into a useful form of energy, such
as using wind turbines to make electrical
power, windmills for mechanical
power, windpumps for water pumping or
drainage, or sails to propel ships.

8. Geothermal energy is thermal energy generated and stored in the
Earth. Thermal energy is the energy that determines the temperature
of matter. The geothermal energy of the Earth's crust originates from
the original formation of the planet (20%) and from radioactive decay
of minerals (80%).

10. 
In chemistry, Chemical
energy is the potential of
a chemical substance to
undergo a
transformation through a
chemical reaction or, to
transform other
chemical substances.
Examples include
batteries and light bulbs
and cells etc. Breaking
or making of chemical
bonds involves
energy, which may be
either absorbed or
evolved from a
chemical system.

Energy that can be
released (or absorbed)
because of a reaction
between a set of
chemical substances is
equal to the difference
between the energy
content of the products
and the reactants. This
change in energy is
change in internal
energy of a chemical
reaction