S7 lesson 4 Energy transformations-Cambridge Lower Secondary Checkpoint Science-Physics.pptx

Energy Transformations

1. Energy Transformations By Emmanuel Nzumvira Tel: [phone] Email: [email protected]

2. TOPIC 6. ENERGY TRANSFORMATIONS Definition : Energy transformation is the change of energy from one form to another to do work. Work cannot be done without changes in energy. Before energy can be changed or transferred it must be stored . Stored energy does not d o any work when it is still stored .

3. Energy descriptions in a video

4. Energy transformations Activity Look at each picture and write energy transformations that take place.

5. 1. Motorcycle that uses gasoline (petrol) for movement

6. 2. Cooking food using firewood

7. 3. Power generation using coal

8. 4. Running a hydro-electric power

9. 5. Producing electricity using windmills

10. 6. Using a drilling machine

11. 7. Watching a movie on Television

12. Energy transformations Energy changes are not always positive. For example, events such typhoons, Tsunami, hurricanes and earthquakes are energy changes that are so dangerous. Processes such as burning can also damage the environment and property.