renewable energy resources

chapter 5-section 2

Big image

solar energy

solar energy is radiant light and heat from the Sun harnessed using a range of ever-evolving technologies such as solar heating, photovoltaics, solar thermal energy,solar chitecture and artificial photosynthesis.


*advantages

-renewable

-runs almost all hours of the day


*disadvantages

-the sun doesn't shine 24 hours a day.

-solar panels are expensive

Big image

wind energy

A wind turbine is a device that converts kinetic energy from the wind into electrical power. The term appears to have migrated from parallel hydroelectric technology (rotary propeller). The technical description for this type of machine is an aerofoil-powered generator.


*Advantages of Wind Power

-It's a clean fuel source. Wind energy doesn't pollute the air

-re-usable


*disadvantages

-wind farms are noisy

- may spoil the view for people living near them

Big image

hydroelectric

Hydroelectricity is the term referring to electricity generated by hydropower; the production of electrical power through the use of the gravitational force of falling or flowing water.


*advantages

-it's a clean fuel source

-re-usable


*disadvantages

-The reservoir of water for hydroelectric power releases a large amount of carbon dioxide and methane.

-The area around the dam is filled with water.

Big image

biomass

Biomass contains stored energy. That's because plants absorb energy from the sun through the process of photosynthesis. When biomass is burned, this stored energy is released as heat. Burning biomass releases carbon dioxide.


*advantages

-No Harmful Emissions

-re-usable


*disadvantages

-Expensive

-someone has to do the hard work