6º. Unit 7.Energy

6º. Unit 7.Energy

What Is Energy?

The simplest definition of energy is "the ability to do work". Energy is how things change and move. It's everywhere around us and takes all sorts of forms. It takes energy to cook food, to drive to school, and to jump in the air.

Read more at: http://www.ducksters.com/science/energy.php
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The simplest definition of energy is "the ability to do work". Energy is how things change and move. It's everywhere around us and takes all sorts of forms. It takes energy to cook food, to drive to school, and to jump in the air.

Read more at: http://www.ducksters.com/science/energy.php
This text is Copyright © Ducksters. Do not use without permission.

The simplest definition of energy is "the ability to do work". Energy is how things change and move. It's everywhere around us and takes all sorts of forms. It takes energy to cook food, to drive to school, and to jump in the air.

Read more at: http://www.ducksters.com/science/energy.php
This text is Copyright © Ducksters. Do not use without permission.

 The simplest definition of energy is "the ability to do work". Energy is how things change and move. It's everywhere around us and takes all sorts of forms. It takes energy to cook food, to drive to school, and to jump in the air.

Energy from Pinaki Bhadury

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video

Forms of energy 

Kinetic Energy

Kinetic Energy is energy that is in motion. Moving water and wind are good examples of kinetic energy. Electricity is also kinetic energy because even though you can't see it happen, electricity involves electrons moving in conductors.

Potential Energy

Energy is measured in the amount of "work" it does. Potential Energy is stored energy. Examples of potential energy are oil sitting in a barrel, or water in a lake in the mountains. This energy is referred to as potential energy, because if it were released, it would do a lot of work.
Energy can change from one form to another. A good example is a Roller Coaster. When it is on its way up, it is using kinetic energy since the energy is in motion. When it reaches the top it has potential (or stored) energy. When it goes down the hill it is using kinetic energy again.

Other Types of Energy

There are other types of energy as well:

• Mechanical Energy is the energy of motion that does the work. An example of mechanical energy is the wind as it turns a windmill.
• Heat energy is energy that is pushed into motion by using heat. An example is a fire in your fireplace.
• Chemical Energy is energy caused by chemical reactions. A good example of chemical energy is food when it is cooked.
• Electrical Energy is when electricity creates motion, light or heat. An example of electrical energy is the electric coils on your stove.
• Gravitational Energy is motion that is caused by gravity. An example of gravitational energy is water flowing down a waterfall.
•  Light - Light is called radiant energy.The Earth gets a lot of its energy from the light of the Sun. 
•  Motion - Anything that is moving has energy. This is also called kinetic energy. 
• Nuclear - Huge amounts of nuclear energy can be generated by splitting atoms.
  

  

  
  

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Light

What is light?

When we're very young, we have a very simple idea about light: the world is either light or dark and we can change from one to the other just by flicking a switch on the wall. But we soon learn that light is more complex than this.
Light arrives on our planet after a speedy trip from the Sun, 149 million km (93 million miles away). Light travels at 186,000 miles (300,000 km) per second, so the light you're seeing now was still tucked away in the Sun about eight minutes ago. Put it another way, light takes roughly twice as long to get from the Sun to Earth as it does to make a cup of coffee!

Why are there different colours of light? There are different colours of light because they are light waves which have different wavelengths. Red light has the longest wavelength while violet light has the shortest wavelength.
What are the primary colours of light? Red, green and blue are the primary colours of light. Mixing them in various ways will make all other colours, including white.
What is reflection? The bouncing back of light waves when they hit an object with a very smooth and shiny surface, like a mirror, is called reflection.
What is refraction? The bending of light as it passes from one transparent substance to another, like air to water, is called refraction.
What makes a rainbow? When sunlight is intercepted by a drop of water in the atmosphere, some of the light refracts into the drop, reflects from the drop's inner surface, and then refracts out of the drop. The first refraction separates the sunlight into its component colours, and the second refraction increases the separation. The result is a rainbow.

Game 

More games

• How we see things (interactive)

• Light sources and light rays

•   The Many Colors of Light

Heat 

Heat Transfer

Learn about heat transfer and how to keep things warm by testing the characteristics of different materials with this fun activity for kids. Some materials are good thermal conductors, easily letting heat pass through them, while others are good thermal insulators, not easily letting heat pass through them. Conduct experiments and watch how the temperature changes. Record your results on a table and make your own conclusions, some materials help keep things warm while others make them go cold quick. Find out if metal, cardboard and polystyrene are good at thermal insulation or have good thermal conductivity by checking out this heat transfer activity.

Heat Energy Games & Videos

Heat Energy Song

Heat Energy HangMouse

Heat Energy Word Search

Heat Energy LetterFall

Heat Energy Word-O-Rama

Heat Energy MatchIt

Heat Cardflip

LINKS

• THE MOST USED SOURCES OF ENERGY 

• ELECTRIC CURRENTS 

• PRODUCING ELECTRICITY 

• RENEWABLE AND NON-RENEWABLE ENERGY SOURCES 

• ENERGY SAVING AND LESS CONTAMINATING ALTERNATIVES

• AHORRO ENERGÉTICO Y ALTERNATIVAS MENOS CONTAMINANTES

• SAVING ENERGY AND PROTECTING THE ENVIRONMENT

• AHORRO DE ENERGÍA Y CONSERVACIÓN DEL MEDIO AMBIENTE

•   FUENTES DE ENERGÍA NO RENOVABLES Y RENOVABLES

•  SAVING ENERGY AND PROTECTING THE ENVIRONMENT

• AHORRO DE ENERGÍA Y CONSERVACIÓN DEL MEDIO AMBIENTE

• SELF-EVALUATION