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ENERGY
Living things and non-living things need energy
Energy to
Living things need energy to carry out life processes
grow
move
reproduce
make food
Non-living things need energy to do work
Energy stored in most of energy resources
Source of energy
Forms of energy
Kinetic energy
Potential energy
Light energy
Heat energy
Sound energy
Electrical energy
Kinetic energy is the form of energy a moving object possesses
The faster an object move, the greater its kinetic energy
An object has potential energy when it stores energy
Potential energy
Chemical potential energy
Gravitational potential energy
Food, fuels, dry cells
Object position
- Object mass - Height from
the ground
stored in because of
depend on
Light is a form of energy that allows us to see
We can see object if it reflects light or if it source of light which then enters our eyes.
Plants use light energy to make food
Heat is form of energy that flows from a region of higher temperature to lower temperature
Temperature is a measure of hotness or coldness an object
Heat
- the Sun - volcano - geyser - electrical appliances - burning fuels
- to cook food - to boil water - to catch fire - to change states of
matter
source uses for
Sounds is a form of energy that can be detected by our ears
sound
communication can use
can produced - human activities - musical instruments - speaker of music
system
Why our ears can detect sound energy?
Sound can travel
through
Air
Solids
Liquids
Electrical energy is energy stored in electric field
Electric field
Power station
How power station produced electricity?
Dry cells
Solar panel
Conversion of Energy
Energy is used by transform its energy
Chemical potential energy
Electrical energy
Light energy
Heat energy
Energy can’t be created or destroyed, but
Energy can be converted from one to another
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