ENERGY IN THE LIFE

A. Forms of Energy

Many forms of energy are as follows :

1 . Thermal Energy

Thermal energy is energy generated from the heat of an object . Heat energy is also called heat energy . Heat also occurs in electrical equipment eg irons , ovens , and solder .
The benefits of heat energy are as follows :
a. Drying wet clothes ( sun ) .
b . Cooking food ( stove ) .
c . Smooth the garment ( electricity board ) .
d . Repairing electrical appliances ( electric soldering ) .

2 . Light energy
Energy is the energy of light emitted by the light source , misalnua light energy emitted by the sun , stars, fire and light . Sunlight can be used by plants to make food through photosynthesis and to illuminate the earth and everything in it during the day . At night , we need the light energy from the light to the room .

3 . energy Motion

Motion energy possessed by a moving object . Energy of motion is called kinetic energy . Motion energy can be generated by wind , flowing water , people running , and electrical equipment . An example of motion energy generating equipment is listrikyang fan , blender and electric drill .

4 . Electrical Energy

Electrical energy is the energy that arises due to electric current . Electrical energy is used in a variety of household appliances , such as irons , fans , washing machines , and blenders .

5 . Chemical energy

Chemical energy is the energy released from the chemical reaction . Chemical energy contained in many foodstuffs , fuel , batteries and battery packs .

6 . Vibration energy .

Vibrational energy produced from vibrating objects . Objects that vibrate to produce sound . The level of sound is affected by objects vibrate faster than the sound produced semakintinggi or hard . The slower and weaker vibrating object , then the resulting sound is getting weaker .
Examples of objects that produce vibrational energy is gong , violin , drums and drums .

B. Sources of energy and their role

Energy derived from a source of energy . Energy sources are the tools and materials that produce energy . energy sources around us is

1 . Foodstuffs

Humans need food for energy. Humans acquire food from animals and plants . Food will produce energy through the digestion of food in the body , among other foods Benefits of body cells to replace damaged , moving organs organs , fulfilling the purpose of life and maintain viability .

2 . Sunlight

The sun is the biggest source of energy for life on earth . Sunlight is the energy source of heat and light .
Sunlight can be used for the following things :
a. For photosynthesis .
b . Drying clothes .
c . Drying foodstuffs , such as rice , fish and crackers .
d . Electrical energy generation .
e . Making salt .

4 . water

Water movement energy sources can be used to exercise mislnya rafting , surfing , hydropower etc. ,

5 . wind

Wind is moving air .
Benefits of wind energy as follows :
a. Moving the windmills to drain rice .
b . Help fishermen sail with the wind land and sea breezes .
c . For sports , for example sailboat and parachuting .

6 . Oil and Natural Gas

 Petroleum is an energy source for fuel . Examples are the petroleum processing results kerosene , petrol and diesel . Kerosene used as fuel for stoves and oil lamps . Gasoline used as a fuel for automobiles and motorcycles . Diesel fuel used for diesel engines . natural gas separately drive the steam engines used in factories as fuel and gas stoves .

7 . firewood

Fuel wood produces heat energy . Firewood is used as furnace fuel . The energy produced is used for cooking . If you are camping you can also get warm body to make a bonfire .

8 . electricity

Much electrical energy used by humans . electrical energy derived from plant sources . In the electrical appliance , electrical energy can be converted into energy of motion , light , heat and sound . some household appliances that use electricity are a fan, refrigerator , television. magic jar , etc. .

9 . battery

Batteries have a variety of shapes and sizes . Energy of batteries can be used , among other things :
a. Turning on a flashlight
b . Moving clockwise
c . Moving toy car
d . rang the radio



source : a book of logic