NATURAL SCIENCES AND TECHNOLOGY LESSON PREPARATION

Subject: Natural sciences and Technology Grade: SixTopic: Mains electricity Time in weeks: 2 ½ weeksDate started (actual): Date completed (actual):

SPECIFIC AIMS

Specific Aim 1: ‘Doing Science and Technology’ Learners should be able to complete investigations, analyse problems and use practical processes and skills in designing and evaluating solutions.

Specific Aim 2: ‘Understanding and connecting ideas’ Learners should have a grasp of scientific, technological and environmental knowledge and be able to apply it in new contexts.

Specific Aim 3: ‘Science, Technology and Society’ Learners should understand the practical uses of Natural Sciences and Technology in society and the environment and have values that make them caring and creative citizens.

STANDSPlanet Earth Beyond

Life and living √ Energy and Change Matter and Materials

Major Process and Design SkillsAccessing and recalling information √ Planning investigationsObserving √ Doing investigationsComparing √ Recording informationMeasuring Interpreting informationSorting and classifying Designing

√ Identifying problems and issues Making/constructingRaising questions Evaluating and Improving productsPredicting CommunicatingHypothesizing

Relevant prior content knowledge: Link with next lesson:

Core knowledge/content: Vocabulary/Important words/Explanation of terminology/New terms:

EXPANDED OPPORTUNITIES

Learners that have learning barriers are given an opportunity to repeat the same work that did not do well and

learner question are reduced to five question , correction are given to the learners , remedial class are given to the learner to ensure that the learner is catered, one on one session with learners that need support.

ASSESSMENTFormal Informal Form of assessment: Tools Form of assessment: Tools

Class work Memo

Electricity is produced

Cold water feeds the boiler

Steam is produced

Burning coalProduces heat

TEACHERS ACTIVITIES LEARNERS’ ACTIVITIES

Teachers notes Fossil fuels and electricity

Fossil fuels were formed in the Earth’s crust millions of years ago from dead plants and animals.coal, oil and natural gas are fossil fuelsIn South Africa coal is mostly used as a fuel in power stations.coal was formed from fossilised plants which got their energy from the Sun originallyin a power station coal is used to boil water, the steam turns a turbine which turns a generator, which produces electricityFossil fuels are non-renewable resources.

The main supplier of electricity in South Africa is ESKOM. ESKOM uses mainly coal to produce energy for industrial and household use.Let's look at a power station to find out how coal is used to produce electricity.Look at the diagram below and the steps which outline the process to make electricity from coal:

Activities: Investigations, practical work, and demonstrations1. Drawing and writing about to explain how fossil fuels such

as coal were formed.

Fossil fuels were formed in the Earth’s crust millions of years ago from dead plants and animals.2. What are the three fossil fuels discussed in the above story. Coal, oil and natural gas.3. How many millions of years ago were this? 300 million years ago.

Activities: Investigations, practical work, and demonstrations

1. Drawing and writing to trace the electrical energy in aSequence from an appliance, such as from your TV set, to the coal-fired power station and back to the original source, the Sun.

Activities : Test on mains electricity Study the picture below that shows how electricity is generated from coal in a power station.

RESOURCES: Pictures and video clips of fuels and their various uses , pictures to show how electricity is generated in a coalfired power station.Teacher’s comments/reflection:

HOD input: monitoring and support: Date: _________________________________

Signature: _____________________________

Class work Memo

Coal supply turbine

generator

TEACHERS ACTIVITIES LEARNERS’ ACTIVITIES

Teachers notes Cost of electricity

electricity is costly because it requires infrastructure including coal mines, transport, power stations, pylons, substations, wiring some electrical appliances require more electricity than others (heating appliances use the most)

the more electricity we use the more we pay and the more coal is used up.

we can save energy in many ways including using energy saving light bulbs and solar water heaters

Illegal connectionsillegal electrical connections are a danger to people because they are often unsafe.

Renewable ways to generate electricity

.

Investigations , practical work, and demonstrations

Examining labels (in adverts, or real electrical appliances)to find out how much power they require (most kettlesrequire more than 2000 W, whilst a radio might requireabout 15 W*). Recording findings on a table.

Appliance ordevice

Power in W or kW Power in watt (W)

Cell phone charger 240 V and 150 mA 36 WElectric kettle 2 kW 2000 WTelevision set 60 W 60 WLight bulb (oldtype)

100 W 100 W

Energy savinglight bulb

15 W 15 W

Computer 230 V and 500 mA 115 WElectric iron 1.4 kW 1400 W

Investigations, practical work, and demonstrations

Researching and writing about renewable ways togenerate electricity including in wind power generators,solar panels (photovoltaics)**, hydro- electric powergenerators.

Wind Power

Advantages Disadvantages

Solar panels

Advantages Disadvantages

Hydro- electric power

Advantages Disadvantages

RESOURCES: Pictures of renewable ways to generate electricity, including examples of wind power generators, solar power generators, hydro- electric power generators.Teacher’s comments/reflection:

HOD input: monitoring and support: Date: _________________________________

Signature: _____________________________

Wind turbines use wind to generate electricity.

A water wheel uses the flow of water to push the wheel around which can then do

A large hydroelectric power station. As the water flows from the higher

dam, through the

Solar panels. 6

NATURAL SCIENCES AND TECHNOLOGY LESSON PREPARATION

Subject: Natural sciences and Technology Grade: SixTopic: Mains electricity Time in weeks: 2 ½ weeksDate started (actual): Date completed (actual):

SPECIFIC AIMS

Specific Aim 1: ‘Doing Science and Technology’ Learners should be able to complete investigations, analyse problems and use practical processes and skills in designing and evaluating solutions.

Specific Aim 2: ‘Understanding and connecting ideas’ Learners should have a grasp of scientific, technological and environmental knowledge and be able to apply it in new contexts.

Specific Aim 3: ‘Science, Technology and Society’ Learners should understand the practical uses of Natural Sciences and Technology in society and the environment and have values that make them caring and creative citizens.

STANDSPlanet Earth Beyond

Life and living √ Energy and Change Matter and Materials

Major Process and Design SkillsAccessing and recalling information Planning investigationsObserving √ Doing investigationsComparing √ Recording informationMeasuring Interpreting informationSorting and classifying Designing

√ Identifying problems and issues Making/constructingRaising questions Evaluating and Improving productsPredicting Communicating

√ HypothesizingRelevant prior content knowledge: Link with next lesson:

Core knowledge/content: Vocabulary/Important words/Explanation of terminology/New terms:

EXPANDED OPPORTUNITIES

Learners that have learning barriers are given an opportunity to repeat the same work that did not do well and

learner question are reduced to five question , correction are given to the learners , remedial class are given to the learner to ensure that the learner is catered, one on one session with learners that need support.

ASSESSMENTFormal Informal Form of assessment: Tools Form of assessment: Tools