ENERGY

1. ENERGY By: Andrea and Mónica 

2. What is energy ? • Energy is the ability or the capacity to do work. Energy can be changed from one form to another but it can`t be created or detroyed.

3. Energy types and energy sources Energy i inide thimgs.For examplein the food we can find chemilican energy that our body transform in kinetical energy thatlet us move,run,etc…t un we can find thermal energy.All these form are form of energy. There are 2 big groups of form of energy: potiental energy and kinetical energy. Energy souces are the natural resorces we can use to get energy and then we can cheange it into diffent forms. We use olar pannels to get energy form the sun, etc…

4. Kinds of energy sources • There are 2 tips of energy: renewable and non- renewable .

5. Renewable energy  • Renewable energy sources include all fuel types and energy carriers, different from the fossil ones. Renewable energy sources include solar energy (which comes from the sun and can be turned into electricity and heat), wind energy, geothermal energy (from inside the earth), biomass from plants, and hydropower from water are also renewable energy sources .

6. Wave • Waves are caused by the wind blowing over the surface of the ocean. There is tremendous energy in the ocean waves. It's estimated that the total potential off the coasts of the United States is 252 billion kilowatthours a year, about 6% of the United States' electricity consumption in 2010. The west coasts of the United States and Europe and the coasts of Japan and New Zealand are good sites for harnessing wave energy.

7. Geothermal • The word geothermal comes from the Greek words geo (earth) and therme (heat). So, geothermal energy is heat from within the Earth. We can recover this heat as steam or hot water and use it to heat buildings or generate electricity. • Geothermal energy is a renewable energy source because the heat is continuously produced inside the Earth.

8. Hydro - electric • The water flows through a pipe, then pushes against and turns blades in a turbine to spin a generator to produce electricity.

9. Solar • The sun has produced energy for billions of years.  Solar energy is the sun’s rays (solar radiation) that reach the Earth. This energy can be converted into other forms of energy, such as heat and electricity.

10. Wind • Wind is simply air in motion. It is caused by the uneven heating of the Earth's surface by the sun. Because the Earth's surface is made of very different types of land and water, it absorbs the sun's heat at different rates. One example of this uneven heating can be found in the daily wind cycle.

11. Biomass • Biomass is organic material made from plants and animals (microorganisms). Biomass contains stored energy from the sun. Plants absorb the sun's energy in a process called photosynthesis. The chemical energy in plants gets passed on to animals and people that eat them

12. Tidal • Tidal turbines are basically wind turbines in the water that can be located anywhere there is strong tidal flow. Because water is about 800 times denser than air, tidal turbines have to be much sturdier than wind turbines. Tidal turbines are heavier and more expensive to build but capture more energy.

13. Non-renewable energy  • Energy sources are considered nonrenewable if they cannot be replenished (made again) in a short period of time.

14. Oil (petroleum) • Oil was formed from the remains of animals and plants (diatoms) that lived millions of years ago in a marine (water) environment before the dinosaurs. Over millions of years, the remains of these animals and plants were covered by layers of sand and silt. Heat and pressure from these layers helped the remains turn into what we today call crude oil. The word "petroleum" means "rock oil" or "oil from the earth."

15. Natural Gas • The search for natural gas begins with geologists, who study the structure and processes of the Earth. They locate the types of rock that are likely to contain gas and oil deposits.

16. Nuclear • The fuel most widely used by nuclear plants for nuclear fission is uranium. Uranium is nonrenewable, though it is a common metal found in rocks all over the world. Nuclear plants use a certain kind of uranium, referred to as U-235. This kind of uranium is used as fuel because its atoms are easily split apart. Though uranium is quite common, about 100 times more common than silver, U-235 is relatively rare.

17. Coal • Coal is a combustible black or brownish-black sedimentary rock composed mostly of carbon and hydrocarbons. It is the most abundant fossil fuel produced in the United States

18. THE END THANK YOU FOR YOUR ATTENTION