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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

find the 15th term of the geometric sequince whose first is 18 and last term of 387
Jerwin Reply
I know this work
salma
The given of f(x=x-2. then what is the value of this f(3) 5f(x+1)
virgelyn Reply
hmm well what is the answer
Abhi
how do they get the third part x = (32)5/4
kinnecy Reply
can someone help me with some logarithmic and exponential equations.
Jeffrey Reply
sure. what is your question?
ninjadapaul
20/(×-6^2)
Salomon
okay, so you have 6 raised to the power of 2. what is that part of your answer
ninjadapaul
I don't understand what the A with approx sign and the boxed x mean
ninjadapaul
it think it's written 20/(X-6)^2 so it's 20 divided by X-6 squared
Salomon
I'm not sure why it wrote it the other way
Salomon
I got X =-6
Salomon
ok. so take the square root of both sides, now you have plus or minus the square root of 20= x-6
ninjadapaul
oops. ignore that.
ninjadapaul
so you not have an equal sign anywhere in the original equation?
ninjadapaul
hmm
Abhi
is it a question of log
Abhi
🤔.
Abhi
I rally confuse this number And equations too I need exactly help
salma
But this is not salma it's Faiza live in lousvile Ky I garbage this so I am going collage with JCTC that the of the collage thank you my friends
salma
Commplementary angles
Idrissa Reply
hello
Sherica
im all ears I need to learn
Sherica
right! what he said ⤴⤴⤴
Tamia
hii
Uday
hi
salma
what is a good calculator for all algebra; would a Casio fx 260 work with all algebra equations? please name the cheapest, thanks.
Kevin Reply
a perfect square v²+2v+_
Dearan Reply
kkk nice
Abdirahman Reply
algebra 2 Inequalities:If equation 2 = 0 it is an open set?
Kim Reply
or infinite solutions?
Kim
The answer is neither. The function, 2 = 0 cannot exist. Hence, the function is undefined.
Al
y=10×
Embra Reply
if |A| not equal to 0 and order of A is n prove that adj (adj A = |A|
Nancy Reply
rolling four fair dice and getting an even number an all four dice
ramon Reply
Kristine 2*2*2=8
Bridget Reply
Differences Between Laspeyres and Paasche Indices
Emedobi Reply
No. 7x -4y is simplified from 4x + (3y + 3x) -7y
Mary Reply
how do you translate this in Algebraic Expressions
linda Reply
Need to simplify the expresin. 3/7 (x+y)-1/7 (x-1)=
Crystal Reply
. After 3 months on a diet, Lisa had lost 12% of her original weight. She lost 21 pounds. What was Lisa's original weight?
Chris Reply
what's the easiest and fastest way to the synthesize AgNP?
Damian Reply
China
Cied
types of nano material
abeetha Reply
I start with an easy one. carbon nanotubes woven into a long filament like a string
Porter
many many of nanotubes
Porter
what is the k.e before it land
Yasmin
what is the function of carbon nanotubes?
Cesar
I'm interested in nanotube
Uday
what is nanomaterials​ and their applications of sensors.
Ramkumar Reply
what is nano technology
Sravani Reply
what is system testing?
AMJAD
preparation of nanomaterial
Victor Reply
Yes, Nanotechnology has a very fast field of applications and their is always something new to do with it...
Himanshu Reply
good afternoon madam
AMJAD
what is system testing
AMJAD
what is the application of nanotechnology?
Stotaw
In this morden time nanotechnology used in many field . 1-Electronics-manufacturad IC ,RAM,MRAM,solar panel etc 2-Helth and Medical-Nanomedicine,Drug Dilivery for cancer treatment etc 3- Atomobile -MEMS, Coating on car etc. and may other field for details you can check at Google
Azam
anybody can imagine what will be happen after 100 years from now in nano tech world
Prasenjit
after 100 year this will be not nanotechnology maybe this technology name will be change . maybe aftet 100 year . we work on electron lable practically about its properties and behaviour by the different instruments
Azam
name doesn't matter , whatever it will be change... I'm taking about effect on circumstances of the microscopic world
Prasenjit
how hard could it be to apply nanotechnology against viral infections such HIV or Ebola?
Damian
silver nanoparticles could handle the job?
Damian
not now but maybe in future only AgNP maybe any other nanomaterials
Azam
Hello
Uday
I'm interested in Nanotube
Uday
this technology will not going on for the long time , so I'm thinking about femtotechnology 10^-15
Prasenjit
can nanotechnology change the direction of the face of the world
Prasenjit Reply
At high concentrations (>0.01 M), the relation between absorptivity coefficient and absorbance is no longer linear. This is due to the electrostatic interactions between the quantum dots in close proximity. If the concentration of the solution is high, another effect that is seen is the scattering of light from the large number of quantum dots. This assumption only works at low concentrations of the analyte. Presence of stray light.
Ali Reply
the Beer law works very well for dilute solutions but fails for very high concentrations. why?
bamidele Reply
how did you get the value of 2000N.What calculations are needed to arrive at it
Smarajit Reply
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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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