What is the main source of energy for life on Earth?

The Sun is the main source of energy on Earth. It is a star that emits huge amounts of light and heat energy. Light and heat travel from the Sun to the Earth through space. Without the Sun, the Earth would become dark and cold, and no living things would survive.
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What are the two main types of energy?

There are two main types of energy - potential and kinetic energy. 

If an object is moving, it has kinetic energy. If the object moves faster, it has more kinetic energy.

If an object is stationary, it has stored energy called potential energy. You can think of this type of energy as the “potential” of the object to do work. When the object moves, the potential energy is converted to kinetic energy.
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What are the different forms of energy?

Energy has different forms. It can be in the form of light, sound, heat, or electricity.
  • Light (also called radiant energy) is the form of energy that allows you to see the things around you.
  • Sound is the form of energy produced by a vibrating object. 
  • Heat is a form of energy that flows from a warmer material to a colder one.
  • Electricity is a form of energy that exists due to the presence of charged particles.
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Some Interesting Facts

  • Robert Boyle was the first scientist to demonstrate that sound cannot travel through an empty space. He hung a bell inside a glass jar. He used an air pump to remove air from the jar. As more air was removed from the jar, the sound of the bell became softer and softer. When all air had been removed, the bell made no sound.
  • A luminous source gives out light. Sometimes at night, the Moon can be very bright that it lights up the night sky. However, the Moon is not considered a luminous source. It is non-luminous. It shines because its surface reflects light from the sun.
  • The Aurora is a spectacular light show in the night sky. The air glows in different colors. This phenomenon is caused by the electrically charged particles released from the sun that enter the earth’s atmosphere. The lights are seen near the North and South Poles.

All About Energy

Are you looking for fun and engaging energy activities that you can do with your kids? Check out this All About Energy resource that has everything you need for an interactive science unit in your classroom. It includes posters, word cards, nonfiction unit booklet, lap book guide, energy activities, workbook, answer key, graphic organizers, and writing activities. 

This comprehensive packet includes 5 pdf files: Energy Booklet, Posters and Word Cards, Fun Energy Workbook, Lap Book Guide, and Writing Activities Booklet.