energy transformation

ENERGY TRANSFORMATION

What is energy transformation?

The conservation of energy principle states that energy can neither be destroyed nor created. Instead, energy just transforms from one form into another. So what exactly is energy transformation? Well, as you might guess, energy transformation is defined as the process of changing energy from one form to another.

There are so many different kinds of energy that can transform from one form to another. There is energy from chemical reactions called chemical energy, energy from thermal processes called heat energy, and energy from charged particles called electrical energy. The process of fission, which is splitting atoms, andfusion, which is combining atoms gives us another type of energy called nuclear energy. And finally, the energy of motion, kinetic energy, and the energy associated with position, potential energy, are collectively called mechanical energy.

Examples of energy transformation:

1. A toaster transforms electrical energy into thermal energy.

2. A blender transforms electrical energy into mechanical energy.

3. The sun transforms nuclear energy into ultraviolet, infrared, and gamma energy all forms of electromagnetic energy.

4. Our bodies convert chemical energy from food into mechanical and electrical energy to allow us to move.

5. A natural gas stove converts chemical energy from burning into thermal energy used to cook food.

What are the pros and cons on chemical and electrical energy?

1. Chemical energy is the most abundant source of energy available. Different chemical energy sources are copiously available worldwide. One of these common sources includes crude oil. Crude oil is produced from the process of chemical conversion occurred from the fossilized remains of dead animals and plants under great pressure exerted by the Earth’s layer. People have a very high dependency on crude oil that the status of all global economies is affected directly by price fluctuations of crude oil. Some other copious sources of chemical energy include wood, coal and other organic materials such as wax.

http://study.com/academy/lesson/energy-transformation-definition-types-examples.html

Copy of the Prezi

Water Contamination

WATER CONTAMINATION

In the developed world, regulation has restricted industry and agricultural operations from pouring pollutants into lakes, streams, and rivers. Technology has also offered a solution in the form of expensive filtration and treatment plants that make our drinking water safe to consume. Some cities are even promoting "green" infrastructure, such as green roofs and rain gardens, as a way to naturally filter out pollutants. But you may find a different picture in parts of the developing world, where there is less infrastructure—politically, economically, and technically—to deal with the barrage of pollution threats facing freshwater and all of the species that rely on it.

Fast Facts

• In developing countries, 70 percent of industrial wastes are dumped untreated into waters, polluting the usable water supply.

• On average, 99 million pounds (45 million kilograms) of fertilizers and chemicals are used each year.

• Portland, Oregon, is actively pursing “green roofs” and “green streets” to prevent sewer overflows into the Willamette River. Chicago, Illinois, now has more than 517,000 acres (209,222 hectares) of vegetated roofs—more than any other U.S. city—which are helping to catch storm water, cool the urban environment, and provide opportunities for rooftop gardens

Diseases Caused By Water Pollution:

1.     Cholera

2.      Amoebiasis (Traveller’s Diarrhea)

3.       Dysentery

4.       Diarrhea

5.       Hepatitis A

6.       Lead Poisoning                                                  

7.      Malaria

8.       Polyomavirus Infection

9.       Polio (Infantile Paralysis)

10.     Arsenicosis

11.    Fluorosis

12.    Dracunculiasis (Guinea Worm Disease)

13.    Intestinal Worms

14.    Trachoma (Eye Infection)

15.    Typhoid Fever

16.    Schistosomiasis (Bilharzia)

17.     HIV/AIDS

        Sources: http://environment.nationalgeographic.com    http://www.newhealthadvisor.com/ 

       http://www.testingbrain.com/

PYP Inquiry Cycle

Types of energy

Types Of Energy 

What is mechanical energy?

Mechanical energy is the energy that is possessed by an object due to its motion or due to its position. Mechanical energy can be either kinetic energy (energy of motion) or potential energy(stored energy of position). Objects have mechanical energy if they are in motion and/or if they are at some position relative to a zero potential energy position.

Example:

A brick held at a vertical position above the ground or zero height position.

http://www.physicsclassroom.com/class/energy/Lesson-1/Mechanical-Energy

What is electrical energy?

Matter is made up of atoms. In these atoms, there are some even small stuff called electrons that are constantly moving. The movement of these electrons depends on how much energy it has. This means every object haspotential energy, even though some have more than others.

Humans can force these moving electrons along a path from one place to the other. There are special mediums (materials) called conductors, that carry this energy. Some materials cannot carry energy in this form, and they are called insulators. We generate electrical energy whey we succeed in causing these electrons to move from one atom to the other, with the use of magnetic forces. 

Example:

Lightning is one good example of electrical energy in nature, so powerful that it is not confined to a wire. Thunderclouds build up large amounts of electrical energy. This is called static electricity. They are released during lightning when the clouds strike against each other.

http://www.eschooltoday.com/energy/kinds-of-energy/what-is-electrical-energy.html

What is chemical energy?

Chemical Energy is energy stored in the bonds of chemical compounds (atoms and molecules). It is released in a chemical reaction, often producing heat as a by-product (exothermic reaction). Batteries, biomass, petroleum, natural gas, and coal are examples of stored chemical energy. Usually, once chemical energy is released from a substance, that substance is transformed into an entirely new substance.

We just talked about the fact that plants use solar energy to make sugar from carbon dioxide and water. Sugar, carbon dioxide and water are all chemicals that are held together by what we call chemical bonds or forces that hold the chemicals together. For example, all sugars are composed of carbon, oxygen and hydrogen atoms that are held together by chemical bonds. These atoms don't just stick together automatically. Rather, energy is needed to hold them together. Plants utilize solar energy to put the carbon, the hydrogen and the oxygen atoms together in the form of sugar. 

Example:

The dry wood is a store of chemical energy. As it burns in the fireplace, chemical energy is released and converted to thermal energy (heat) and light energy. Notice that the wood now turns into ashes (a new substance)

http://www.eschooltoday.com/energy/kinds-of-energy/what-is-chemical-energy.html

http://study.com/academy/lesson/what-is-chemical-energy-definition-examples.html

NEWTON´S LAWS

CULTURAL DIVERSITY