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Geography

Grade 5

Resources

Module 23

Sun, moon, wind and recycling

The sun as a resource

The energy that can be obtained from the sun (solar energy) is very difficult to understand. It is 9 000 times more than all the energy that is currently generated all over the world! And it cannot be used up!

Unfortunately, we do not yet know how to use solar energy on a large scale. The climate and the weather, and the fact that there is something like night and day, also have a great effect on the use of solar energy. Where solar energy can be used on a small scale, the technology is still also very expensive.

But there are ways of using solar energy. Solar panels can be used to heat water for houses, and solar cells can be used to generate electricity .

By the time you are grown up, someone might have discovered how to utilise the energy from the sun better. Perhaps one of you might have a share in such a wonderful discovery!

***SORRY, THIS MEDIA TYPE IS NOT SUPPORTED.***

The moon as a resource

Perhaps it is a surprise to you to read that the moon is a resource for people! Just like the sun has 9 000 times more energy than we can generate, the moon has 100 times more energy to use.

You know that the moon causes tides in the sea, and by using the tides we can generate electricity. By building a closed bay with a sea wall with gates, the flow of the water can be used to generate electricity.

This method is used in very few places in the world, because there are still too many problems to be overcome.

The wind as a resource

The wind has been used as a resource for many centuries. Think of the sailing ships, the Dutch who pump water back to the sea with their well-known windmills, the windmills on many farms in our country, and so on.

However, at the moment scientists are investigating the use of wind on a much larger scale. The ideal is that the wind should be used on a large scale to generate electricity. In the USA and Europe this type of project has been going on for a long time. In 2002 the first wind power station was constructed in South Africa. This was on the farm Windhoek between Darling and Yzerfontein on the West Coast. (Does the name of the farm say anything?)

Activity 1:

To identify and investigate possible solutions to an energy problem

[lo 1.6]

It is the year 2010. A thorough investigation has been done and it was discovered that there would be just enough supplies of coal and crude oil left in the world for seven to ten years! What happens now? (Group work).

  • Newspapers
  • Tins
  • Plastic
  • Glass
  • Cardboard
  • Magazines

We can just guess at how many tons of these materials land on refuse dumps in towns and cities every day!

Sometimes non-renewable resources are used to make these materials. But who cares?

Wood, a renewable resource , is used to make cardboard and paper for newspapers and magazines. It seems as if there is no problem with wood, but the plantations where enough trees are planted to provide enough wood every year use so much water from the soil that it causes problems in some places. Rivers and fountains are no longer being fed and nature and man are suffering. Wood must be saved!

Interesting....

Successful recycling also means smaller refuse dumps.

In some countries (e.g. Switzerland) residents are forced to sort their household refuse and place it in different coloured bags.

In the city of Curitiba in Brazil people can exchange their sorted household refuse for free bus tickets and vegetables.

Poor people in Africa produce only a fraction of the household refuse that rich Americans throw away.

Even if a poor family wants to recycle, their house is often so small that there is no room to keep the sorted household refuse.

Activity 2:

To launch / manage a recycling project

[lo 1.6; 2.3]

For the learners at a school where a recycling project has already been started:

Find out what the school's average earnings per month are from the recycling project. Design an incentive system to increase these earnings.

For the learners at a school with no recycling project:

Phone a place close to you that recycles newspaper and find out what they pay per kilogram.

Measure the mass of a week’s newspapers that a family receives and calculate what it would be worth.

Calculate how much money your school can make per year if only half the

families in the school bring their newspapers to school.

Write a letter to the principal and ask whether you can start a recycling project.

Explain the benefits to your school, but also to the country.

Assessment

LO 1

GEOGRAPHICAL ENQUIRY

The learner will be able to use enquiry skills to investigate geographical and environmental concepts and processes.

We know this when the learner:

1.1 with guidance, selects and uses sources of useful geographical information [finds sources];

1.2 distinguishes between facts and opinions [works with sources];

1.3 categorises information [works with sources];

1.4 uses an index to find places on global atlas maps [works with sources];

1.6 identifies and explores possible solutions to problems [answers the question];

1.7 demonstrates knowledge and under-standing of the issue through projects, discussion, debate and charts [communicates the answer].

LO 2

GEOGRAPHICAL KNOWLEDGE AND UNDERSTANDING

The learner will be able to demonstrate geographical and environmental knowledge and understanding.

We know this when the learner:

2.2 identifies links between natural resources and economic activities in South Africa [people and resources];

2.3 describes ways in which the physical environment influences human activity and how human activity is influenced by the physical environment [people and the environment].

Questions & Answers

Application of nanotechnology in medicine
what is variations in raman spectra for nanomaterials
Jyoti Reply
I only see partial conversation and what's the question here!
Crow Reply
what about nanotechnology for water purification
RAW Reply
please someone correct me if I'm wrong but I think one can use nanoparticles, specially silver nanoparticles for water treatment.
Damian
yes that's correct
Professor
I think
Professor
what is the stm
Brian Reply
is there industrial application of fullrenes. What is the method to prepare fullrene on large scale.?
Rafiq
industrial application...? mmm I think on the medical side as drug carrier, but you should go deeper on your research, I may be wrong
Damian
How we are making nano material?
LITNING Reply
what is a peer
LITNING Reply
What is meant by 'nano scale'?
LITNING Reply
What is STMs full form?
LITNING
scanning tunneling microscope
Sahil
how nano science is used for hydrophobicity
Santosh
Do u think that Graphene and Fullrene fiber can be used to make Air Plane body structure the lightest and strongest. Rafiq
Rafiq
what is differents between GO and RGO?
Mahi
what is simplest way to understand the applications of nano robots used to detect the cancer affected cell of human body.? How this robot is carried to required site of body cell.? what will be the carrier material and how can be detected that correct delivery of drug is done Rafiq
Rafiq
if virus is killing to make ARTIFICIAL DNA OF GRAPHENE FOR KILLED THE VIRUS .THIS IS OUR ASSUMPTION
Anam
analytical skills graphene is prepared to kill any type viruses .
Anam
what is Nano technology ?
Bob Reply
write examples of Nano molecule?
Bob
The nanotechnology is as new science, to scale nanometric
brayan
nanotechnology is the study, desing, synthesis, manipulation and application of materials and functional systems through control of matter at nanoscale
Damian
Is there any normative that regulates the use of silver nanoparticles?
Damian Reply
what king of growth are you checking .?
Renato
What fields keep nano created devices from performing or assimulating ? Magnetic fields ? Are do they assimilate ?
Stoney Reply
why we need to study biomolecules, molecular biology in nanotechnology?
Adin Reply
?
Kyle
yes I'm doing my masters in nanotechnology, we are being studying all these domains as well..
Adin
why?
Adin
what school?
Kyle
biomolecules are e building blocks of every organics and inorganic materials.
Joe
anyone know any internet site where one can find nanotechnology papers?
Damian Reply
research.net
kanaga
sciencedirect big data base
Ernesto
Introduction about quantum dots in nanotechnology
Praveena Reply
hi
Loga
what does nano mean?
Anassong Reply
nano basically means 10^(-9). nanometer is a unit to measure length.
Bharti
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Source:  OpenStax, Social sciences: geography grade 5. OpenStax CNX. Sep 23, 2009 Download for free at http://cnx.org/content/col10986/1.2
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