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Natural sciences

Grade 4

Energy and change

Module 32

Man’s use of electrical energy

Activity:

To investigate man’s use of electrical energy

[lo 1.2, 1.3, 2.2]

In our own country, South Africa

We get electricity from power stations that supply power to the whole country. The electricity supply of each town or city depends on the size of the area, the number of houses, the number of factories and the number of people.

Find pictures to represent the uses of electricity in your town or city. Paste the pictures in the space provided below.

Write a short sentence on the use of electricity in the following places: Describe how the people who belong to your culture found safe ways of using electricity in years gone by.

On farms

In factories:

In mining areas:

In our community:

List the situations in which electricity is used in our community.

Three assignments follow. Choose one and act out the event of your choice.

There is a power failure at your school. Show through your acting how it affects

  1. you?
  2. your educator?
  3. the caretaker?
  4. the secretary?
  5. the principal?

Some schools in our country have no electricity. How do you think the staff and learners manage to do the schoolwork?

There is a power failure at the hospital. Show through your acting how it affects

  1. the patient?
  2. the doctor and nursing staff?
  3. the kitchen?
  4. the theatre?

There is a power failure at the supermarket. Show through your acting how it affects

  1. the clientele?
  2. the manager?
  3. the cash register?
  4. the bakery section?
  5. the meat section?
  6. the cooling system/fridges?

Assessment

LEARNING OUTCOME 1: SCIENTIFIC INVESTIGATIONS

The learner will be able to act confidently on curiosity about natural phenomena, and to investigate relationships and solve problems in scientific, technological and environmental contexts.

Assessment Standard

We know this when the learner

1.2 leads investigations and collects data;

  • evaluates data and provides feedback on observations.

LEARNING OUTCOME 2: CONSTRUCTING SCIENCE KNOWLEDGE The learner will know and be able to interpret and apply scientific, technological and environmental knowledge.

Assessment Standard

We know this when the learner

2.2 categorises information.

Memorandum

In our country, South Africa

Write a short sentence on the utilization (use) of energy in the following places. (The learners must write their own sentences according to their cultural group, to indicate how safe methods of using energy have been found throughout the past years. These sentences are merely guidelines.)

On farms:

A farmer uses electricity to save time, energy and money, but then he might not need so many workers.

In factories:

Factories cannot run without electricity. The machines that make products work for very long hours.

In mining areas:

Machines that are used in mines use electricity. This saves time and makes the miners’ work easier.

In our community

Make a list of where we use electricity in our community.

  • Homes
  • Supermarkets
  • Chemist shops
  • Hospitals
  • Streets
  • Shopping centres
  • Churches
  • Any other acceptable answers

Questions & Answers

what are the products of Nano chemistry?
Maira Reply
There are lots of products of nano chemistry... Like nano coatings.....carbon fiber.. And lots of others..
learn
Even nanotechnology is pretty much all about chemistry... Its the chemistry on quantum or atomic level
learn
Google
da
no nanotechnology is also a part of physics and maths it requires angle formulas and some pressure regarding concepts
Bhagvanji
Preparation and Applications of Nanomaterial for Drug Delivery
Hafiz Reply
revolt
da
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
Any one who tell me about Preparation and application of Nanomaterial for drug Delivery
Hafiz
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
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Source:  OpenStax, Natural sciences grade 4. OpenStax CNX. Sep 18, 2009 Download for free at http://cnx.org/content/col11096/1.1
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