Bell work: Name as many forms of Bell work: Name as many forms of energy as you can.energy as you can.

Partnership for Environmental Education and Rural Healthpeer.tamu.edu

ObjectivesObjectives

• Learn about the different sources energy

• Understand how one form of energy is transformed into another form

• Describe the difference between renewable energy, non-renewable energy and inexhaustible energy

EnergyEnergy

CH-113.0

• Energy is the ability to do work.

• We use energy for transportation, to heat and cool our homes, to power our electronic devices and many other things.

EnergyEnergy

CH-113.0

• Law of Conservation of Energy - Energy is neither created nor destroyed; it only changes forms.

This field has devices designed to generate electricity from lightning by harvesting the energy from the electrical discharge produced from lightning.

Energy TransformationEnergy Transformation

• Energy transformation is the process of changing one form of energy into another.

Energy TransformationEnergy Transformation

Biomass in the form of wood Energy from the sun is absorbed by trees and plants and stored as chemical energy through a process called photosynthesis. When wood from trees is burned, heat and light energy are released as those chemical bonds are broken.

Biomass is the total quantity or weight of organisms in a given area.

Biomass in the form of dung

Energy from the sun is stored by plants via photosynthesis. The plants are either eaten by humans, or they are eaten by animals and dung is produced. Dung can be burned to release heat and some light energy.

Energy TransformationEnergy Transformation

Fossil fuels (coal, oil and natural gas)

Energy from the sun is stored by plants as chemical energy via photosynthesis. Plants are eaten by animals. Dead plants and animals gradually rot and, over millions of years, are compressed to make fossil fuels. Fossil fuels are burned, creating heat and light energy plus emissions.

Energy TransformationEnergy Transformation

Energy TransformationEnergy Transformation

Wind power Energy from the sun heats the atmosphere, causing winds. The wind turns the turbines on windmills, which generate electricity.

Energy TransformationEnergy Transformation

Wave energy Energy from the sun heats the atmosphere, causing winds and therefore waves. The waves drive turbines, which generate electricity.

Energy TransformationEnergy Transformation

Solar power Energy from the sun is collected and stored in photovoltaic cells to be used as electricity. Alternately, flat-plate solar thermal collectors can be used to store the sun's heat energy, which can be used directly, or to heat water to make steam to drive a turbine to generate electricity.

Forms of EnergyForms of EnergyForm of Energy Primary Source Ultimate Product

Biomass

Dung

Fossil Fuel

Wind

Waves

Solar

Forms of EnergyForms of EnergyForm of Energy Primary Source Ultimate Product

Biomass Sun Heat/Light

Dung

Fossil Fuel

Wind

Waves

Solar

Forms of EnergyForms of EnergyForm of Energy Primary Source Ultimate Product

Biomass Sun Heat/Light

Dung Sun Heat/Light

Fossil Fuel

Wind

Waves

Solar

Forms of EnergyForms of EnergyForm of Energy Primary Source Ultimate Product

Biomass Sun Heat/Light

Dung Sun Heat/Light

Fossil Fuel SunHeat/Light

Emissions

Wind

Waves

Solar

Forms of EnergyForms of EnergyForm of Energy Primary Source Ultimate Product

Biomass Sun Heat/Light

Dung Sun Heat/Light

Fossil Fuel SunHeat/Light

Emissions

Wind Sun Electricity

Waves

Solar

Forms of EnergyForms of EnergyForm of Energy Primary Source Ultimate Product

Biomass Sun Heat/Light

Dung Sun Heat/Light

Fossil Fuel SunHeat/Light

Emissions

Wind Sun Electricity

Waves Sun Electricity

Solar

Forms of EnergyForms of EnergyForm of Energy Primary Source Ultimate Product

Biomass Sun Heat/Light

Dung Sun Heat/Light

Fossil Fuel SunHeat/Light

Emissions

Wind Sun Electricity

Waves Sun Electricity

Solar Sun Electricity/Heat

Forms of EnergyForms of Energy

• The sun is the primary source of energy for most of the forms of energy that we use in our daily lives.

• However, there are other forms of energy that do not involve the sun.

1. Geothermal

2. Nuclear

3. Hydroelectric (although the sun does power

the water cycle that drives this form of energy)

Geothermal EnergyGeothermal Energy

• In volcanic areas, the rocks

heat the ground water. It rises

to the surface as hot water and

steam.

Geothermal EnergyGeothermal Energy• In some places, deep wells can

be drilled down to the hot

rocks and cold water is

pumped down.

• The water runs through

fractures in the rocks and is

heated up.

• It returns to the surface as hot

water and steam.

Geothermal EnergyGeothermal Energy

• In both cases, the hot water

and steam are used to drive

turbines which generate

electricity.

Nuclear EnergyNuclear Energy

• Nuclear fuels, like uranium, are the primary source of energy for nuclear power.

• These radioactive elements are involved in nuclear chain reactions in the reactor core, which produce large amounts of heat.    

Nuclear EnergyNuclear Energy

• The heat energy is used to boil water.

• The kinetic energy in the expanding steam spins turbines, which then drive generators to produce electricity.  

Hydroelectric EnergyHydroelectric Energy

• Hydroelectricity is electricity generated by hydropower, i.e., the production of power through use of the gravitational force of falling or flowing water.

• Most hydroelectric power comes from the potential energy of dammed water driving a water turbine and generator.

Hydroelectric EnergyHydroelectric Energy

• It is the most widely used form of renewable energy.

• A hydroelectric plant produces no direct waste, and doesn’t create as much of the greenhouse gas carbon dioxide (CO2) as fossil fuel powered energy plants.