[Music]
smile and learn let's find out what
energy is what its properties are and
what types of energy exists energy is
anything that has the capacity to
produce a change in matter if you look
around you'll see that energy is present
everywhere for example cars move
thanks to energy produced by motor
combustion the blades of the mill start
moving thanks to the energy produced by
the wind we can walk or jump thanks to
the energy we get from food you should
know that energy can neither be created
nor destroyed energy can only be
transferred from one object to another
for example energy in the air can be
transformed in electricity and this can
be transformed in thermal energy to warm
a room by means of a radiator we obtain
energy from two sources renewable and
nonrenewable renewable energy refers to
all those limitless energy sources
present in nature like wind for example
sunlight or sea waves non-renewable
energy refers to the limited energy
sources that we exhaust with use like
oil or coal
[Music]
energy possesses four fundamental
properties you should know about energy
transforms for example when we use a
battery for a flashlight the chemical
energy in the battery transforms in
electric energy energy is transferred
from one object to another for example
when we mix hot and cold water
thermal energy passes from hot water to
cold water energy is transported and can
move from one place to another
this way energy travels through electric
cables and reaches our houses energy can
be stored for example mobile phone
batteries are used for storing energy
let's recap energy transforms is
transferred and can also be transported
and stored thermal energy that is also
called heat energy is transferred with
heat mechanical energy is created by two
objects owing to their movement electric
energy is carried by electric currents
chemical energy is found in substances
like food or fuel light energy that is
present in the light e Olek energy that
comes from the wind or hydraulic energy
which we obtained thanks to the flow of
water
it's easy to understand that energy is
essential for life because it causes all
changes to occur in the world around us
[Music]
did you like the video we have so many
more subscribe by clicking on the seal
ah and if you want to keep watching more
videos click on the boxes
[Music]