Slide 1
Name: Sheraz u din qureshi class:7th esubmitted to: Sir
bilalENERGYTypes of energy
There are eight types of
energy.PotentialKineticMechanicalSolarLightHeatElectricalElectromagnetic
Potential EnergyPotential energy is the energy an object has
because of its condition or position . For example, the higher an
object is, the more potential energy it has. So a ball on the roof
of a building has more potential energy than a ball on your desk,
because it can fall farther.
Kinetic EnergyKinetic energy is the energy of motion . If
something is moving it has kinetic energy. The faster an object is
moving, the more kinetic energy it has.
Mechanical energyMechanical energy is the combination of all the
potential and kinetic energy that something has. This is the energy
we use everyday to physically move things. When you move your chair
from one place to another you are using mechanical energy.
solar energySolar Energy energy that comes from the sun . The
word solar means of the sun. People use solar cells that change
light energy from the sun into electricity.
Light energyLight is energy you can see. It moves in waves. How
big those waves are determines what type and color of light it is.
Those waves, however, are so small that they appear to be straight
lines. The complicated part is that light moves in straight lines
only when its not moving through anything at all (i.e. in a
vacuum). When it moves through air, water, glass, or anything else,
its behavior changes.
7Heat energyHeat energy is a form of energy which transfers
among particles in a substance (or system) by means of kinetic
energy of those particle. In other words, under kinetic theory, the
heat is transferred by particles bouncing into each other. In
physical equations, the amount of heat transferred is usually
denoted with the symbolQ.
8Electric energyElectricity , or electric energy that comes from
an electric current . An electric current results from the movement
of electrons. Electrons are particles found in atoms. You can see
some effects of electric energy when you use appliances. You may
have even felt electric energy.
Electromagnetic energy
Electromagnetic energy is a form ofenergythat is reflected or
emitted from objects in the form of electrical and magnetic waves
that can travel through space.
