2.8 To emphasis the sensible use of the resources of the earth

Natural sciences

Energy transfers and forces

Educator section

Memorandum

• Examples of self-assessment have been included in the module to assess the learner’s contribution to the debate, and there is also a “control list” for the research assignment.

Leaner section

Content

Activity: to emphasis the sensible use of the resources of the earth [lo 3.2]

RESEARCH ASSIGNMENT

a. Do research into the nuclear accident that occurred at Chernobyl in Russia in 1986. Write (at least one folio sheet) on the fearful effects of the tragedy with regard to the inhabitants and the environment

or

b. Find out what happens to marine life when ships leak oil. Write about it.

c. Arrange a class debate. Form two groups.

One group has to protest against nuclear power and the other group must offer arguments in favour of the use of it.

Make use of your knowledge of nuclear fuels and fossil fuels, as well as of renewable energy sources (the sun, wind and water) when you prepare your arguments.

Make use of the questionnaire that follows to assess your input.

Self Assessment

Debating

Name:

Date:

CONSERVATION OF ENERGY

Alternative sources of energy, e.g. wind energy, is more environment friendly but very expensive. We therefore have to continue using fossil fuels (coal, oil, gas) and wood. Although new coal and petroleum reserves are still being discovered, these will eventually be exhausted. It is therefore of great importance to use our sources of energy as effectively as possible.

Electricity is convenient and practical, but is has to be generated and this incurs costs. Electrical appliances are classified according to their use of electricity. This is measured in watt or kilowatt (1 kilowatt = 1 000 watt) Electricity accounts are calculated according to the number of units recorded by an electricity meter. This unit is a kilowatt-hour (kWh), i.e. the amount of electricity used by a one-kilowatt appliance in one hour. An automatic washing machine is usually classified as a three-kilowatt appliance. This means that one can expect an account for three units of electricity for each hour that the machine is operated.

Assessment

Learning Outcome 3: The learner will be able to demonstrate an understanding of the interrelationships between science and technology, society and the environment.

Assessment Standard 3.2: We know this when the learner understands sustainable use of the earth’s resources: analyses information related to renewable and non-renewable sources.