Kategorier: Alle - gravity - friction - circuits - energy

af peter hill 14 år siden

1001

Year 8

Students in Year 8 engage in various tasks designed to deepen their understanding of fundamental concepts in physics. They independently design investigations to explore friction, gaining insights into how it acts as a force.

Year 8

Year 8

Resources

Web
Lessonlookup
Books
Smart Princeton
Pain less

4.6 Energy

Tasks

TaskA: Students independently devise and design a first hand investigation that enables an understanding of the concept of friction as a force.

friction video, friction lesson

friction and sliding block, friction applet

TaskB: Students perform teacher-prepared first hand investigations and explain their observations in terms of the Electric Lines of Force Model eg balloons, water, electroscopes etc

Students evaluate the advantages and disadvantages of this model.

electric field lines, electric fields

First hand investigations using magnets and electromagnets. Complementary assessment task.

Task: Students research the significance of the Law of Gravitation as an explanation of the motion and characteristics of celestial objects.

Gravity and Gravitation, Gravitation applet

Task: Students identify different forms of energy and devise/design models to describe the phenomena.

Task: Students design and perform first hand investigations and label summative diagrams showing energy transfers in simple series and parallel circuits.

construct dc circuits

sound waves

em waves (radio), electromagnetic waves

em simple theory

simple theory heat transfer

Experimental investigations in conduction, convection and radiation

Task: students research and identify technological applications of sound, light and heat transfer

Students research the origin of the Law of Conservation of Energy and its significance to the Physical Sciences.

applet Conservation of Mechanical Energy

Bridges, trebuchets etc

Skills
Content
Energy

Conservation

1d) qualitatively account for the total energy involved in energy transfers and transformations

Transfers

3a) associate electricity with energy transfer in a simple circuit

3b) construct and draw circuits to show transfer of energy.

4a) describe sound as a form of energy requiring a medium for propagation.

5a) describe light as a form of energy not requiring a medium for propagation.

6a) identify processes of heat transfer by conduction, convection and radiation.

Definition

1a) identify situations or phenomena in which different forms of energy are evident

1b) use models to describe different forms of energy

1c) identify objects that possess energy because of their motion (kinetic) or because of other properties (potential)

Forces

Gravity

Magnetism

Electrostatic

Ideas

8a) describe ways in which objects acquire an electrostatic charge

2b) use the term ‘field’ in describing forces acting at a distance.

7c) describe the behaviour of charges when they are brought close to each other

Example

7b) identify everyday situations where the effects of electrostatic forces can be observed

Class Exp

Muscle

History

Friction

7a) describe friction as a contact force which opposes motion

7b) identify everyday situations where friction acts.

What they do

2a) identify changes that take place when particular forces are acting

Balanced Deform

Unbalanced Accelerate