Topic 3) Be Shocked!
Unit Summary
This unit expands on the concept of energy, looking at different types of energy and, in particular, at the idea of energy transformations. The efficiency of these transformations has a significant impact on society in terms of optimising the use of energy sources and potential problems created by inefficiencies in energy transformations. This provides a context in which the transfer of heat is presented.
The unit then moves to focus on one form of energy - electricity. This is everywhere and runs almost everything. In their lives, students convert electrical energy to a variety of other forms of energy. But what IS electricity and how does it work? In this unit students will start to develop their understanding of the common features of all electrical circuits and some of the advantages and problems related to their energy transformations.
Learning Intentions
- recognise that energy can be classified as either kinetic or potential energy
- identify specific types of energy - movement, heat, chemical, electrical
- identify situations or phenomena in which different forms of energy are evident
- use models to describe different forms of energy
- identify objects that possess energy because of their motion (kinetic) or because of other properties (potential)
- describe sound as a form of energy requiring a medium for propagation
- describe light as a form of energy not requiring a medium for propagation
- identify the energy transformation in a given situation and everyday devices involving electrical, sound, light and/or heat energy
- describe energy transformations that can be efficient or inefficient
- identify that heat is a common product of inefficient energy transformations
- qualitatively account for the total energy involved in energy transfers and transformations
- describe methods of heat transfer (convection, conduction and radiation)
- recognise examples of static electricity
- recognise technologies driven by current electricity
- identify everyday situations where the effects of electrostatic forces can be observed
- identify the common features of an electrical circuit (an energy source, a resistance and conductors)
- describe differences between a series and a parallel circuit and explain advantages and disadvantages of both
- use correct symbols to draw simple electrical circuits
- construct electrical circuits