a certain body which give us heat and light
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The First Law of Thermodynamics says that energy cannot be created or destroyed. It can only change forms. Energy is in different forms such as light, heat, mechanical, electrical, chemical, nuclear, gravitational etc. But they can all be put into two types of energy: potential (stored) and kinetic (working) energy.
For example, the food you eat contains chemical energy and your body stores this energy until you use it when you work or play.
The sun and the ocean
The Sun is a mighty source of energy. As the Sun is expected to have a life span of 5 billion and more years, this energy is considered renewable. Energy sources can be categorized as renewable and non-renewable. Renewable forms can be easily replenished and non-renewable forms cannot be recreated. These energy sources help us produce electricity and heat. Solar, wind, hydro, geo-thermal (heat from inside the Earth) and biomass are renewable sources of energy. Biomass energy refers to energy from plant sources.
The ocean is an important resource for energy as well. Tidal energy, wave energy and the ocean’s thermal energy can be used to produce secondary sources of energy for our use.
Non-renewable sources
At present, most of our energy is drawn from non-renewable energy sources, which include fossil fuels such as oil, natural gas and coal. They are called fossil fuels because they come from plants and animals that have been buried for millions of years. The weight from the mud and rocks created pressure and heat that changed the plants and animals into fossil fuels. These energy sources are considered non-renewable because once they are consumed, it will take millions of years to produce them.
Another non-renewable energy source is the element uranium found in rocks. Uranium atoms can be split through a process called nuclear fusion to create heat and ultimately electricity.
Secondary energy sources
Secondary sources are also referred to as energy carriers because they move energy in a usable form from one place to another. The most well-known energy carriers are electricity and hydrogen.Electricity is the flow of electrical power or charge, which is our most widely used form of energy. Electricity is the movement of electrons between atoms. Static electricity exists in nature. Lighting is a form of electricity. It is electrons moving from one cloud to another or jumping from the clouds to the earth’s surface.
Like electricity, hydrogen is an energy carrier and must be produced from another substance. Hydrogen is not currently widely used, but it has potential as an energy carrier in the future.
Hydrogen can be produced from water, fossil fuels or biomass and is a by product of other chemical processes. Hydrogen is used often used as fuel in space programmes.
For example, the food you eat contains chemical energy and your body stores this energy until you use it when you work or play.
The sun and the ocean
The Sun is a mighty source of energy. As the Sun is expected to have a life span of 5 billion and more years, this energy is considered renewable. Energy sources can be categorized as renewable and non-renewable. Renewable forms can be easily replenished and non-renewable forms cannot be recreated. These energy sources help us produce electricity and heat. Solar, wind, hydro, geo-thermal (heat from inside the Earth) and biomass are renewable sources of energy. Biomass energy refers to energy from plant sources.
The ocean is an important resource for energy as well. Tidal energy, wave energy and the ocean’s thermal energy can be used to produce secondary sources of energy for our use.
Non-renewable sources
At present, most of our energy is drawn from non-renewable energy sources, which include fossil fuels such as oil, natural gas and coal. They are called fossil fuels because they come from plants and animals that have been buried for millions of years. The weight from the mud and rocks created pressure and heat that changed the plants and animals into fossil fuels. These energy sources are considered non-renewable because once they are consumed, it will take millions of years to produce them.
Another non-renewable energy source is the element uranium found in rocks. Uranium atoms can be split through a process called nuclear fusion to create heat and ultimately electricity.
Secondary energy sources
Secondary sources are also referred to as energy carriers because they move energy in a usable form from one place to another. The most well-known energy carriers are electricity and hydrogen.Electricity is the flow of electrical power or charge, which is our most widely used form of energy. Electricity is the movement of electrons between atoms. Static electricity exists in nature. Lighting is a form of electricity. It is electrons moving from one cloud to another or jumping from the clouds to the earth’s surface.
Like electricity, hydrogen is an energy carrier and must be produced from another substance. Hydrogen is not currently widely used, but it has potential as an energy carrier in the future.
Hydrogen can be produced from water, fossil fuels or biomass and is a by product of other chemical processes. Hydrogen is used often used as fuel in space programmes.
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