Energy types

energy types and forms of it

1. What the common thing that these things give us?

2. Energy Types Of Energy

3. By the end of this lesson, you will be able to: Explain that energy provides the ability to do work and can exist in different forms. Differentiate between kinetic and potential energy. Demonstrate how one form of energy can be converted into other form of energy. Learning Outcomes

4. Energy causes things to happen around us. Without energy we cannot do any thing . Scientists define energy as: Energy is the ability to do work. Energy is measured in joules(J).

5. Forms of energy Energy can be found in different forms such as:

6. We can put all thesis forms of energy into two categories(types): potential and kinetic. Types of energy

7. Potential Energy , the First type’ Is: energy that is stored in an object due to change in its position or shape. It is written as P.E. Types of energy

8. Examples of P.E Energy stored in a stretched or compressed spring or material – Elastic PE

9. Examples of P.E Energy stored within bonding between molecules chemical PE

10. Examples of P.E Energy stored in an object because where it is placed Gravitational PE

11. Kinetic Energy , the second type’ Is moving ”released” energy Energy in a body due to its motion It is written as K.E.

12. Examples of K.E Shooting a rubber band. Water falling over the fall. Releasing arrow from the bow. Thermal and electrical energy are good examples for KE.

13. Energy can not created or destroyed or removed, it can only be change from one form to another. In other words energy can change forms between kinetic and potential, but it never disappears. The total amount of energy is always the same. Changes in the form of energy …is called: “Energy Conversions” The Transformation of Energy

14. summary We learned that Energy: can be either Potential Energy (PE) or Kinetic Energy (KE) is measured in Joules (J) comes in different forms: Mechanical (from moving objects) Chemical (chemical bonds in a substance) Thermal (heat energy) Electromagnetic (travels through space as waves) Sound (travels through air or other matter as waves) Nuclear (from nuclear reactions) Electrical (electricity)…ext We also learned that energy can neither be created or destroyed – only transformed. This is the Law of Conservation of Energy. The amount of energy in the universe is constant

15. Concept checking The two main categories of energy are potential and kinetic. Which type of energy increases when you compress a spring? energy Can be created or destroyed Potential energy → Energy that is stored because of position or shape Electrical energy → a form of potential energy that is stored in chemical bonds between atoms Electrical energy → a form of potential energy that is stored in chemical bonds between atoms…. Why? Which type of energy lifted large box? What form of energy is stored in the nucleus of an atom

16. Quiz time: You will work in groups ( 3 m each group) The diagram blow shows the steps involved in using the energy in steam to generate electricity. Use the diagram to help you fill in the blanks in the story in the next slide with the following terms : mechanical , chemical , heat , light , and electrical . Some words may be used more than one. You have 5 minutes to finish your work Write your answers in one sheet for each group .

17. (1)________energy from gas, oil or coal provides(2 )_________ energy to water to produce steam. A turbine changes the energy of steam into the (3)_________ energy of rotating turbine and generator convert this energy into (4)_________ energy. The lamp is an energy converter, changing (5) ________ energy to(6)________ and (7)________ energy. chemical heat mechanical electrical electric heat light

18. Energy Transfer Chemical Electrical Electrical Electrical Sound (mechanical) Light (Electromagnetic) Thermal Mechanical

19. Thanks for listening