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Natural sciences

Grade 4

Matter, substances and materials

Module 56

The value of building material as a resource

Activity:

To appreciate the value of materials as a resource in the building of houses

[lo 1.2.1, 2.2.1, 3.2]

Building materials

When a house is built the materials used are either natural or are manufactured. Here is a picture of a house. Colour in the natural materials yellow and the manufactured materials red.

Wood

One of the natural products that are used to build the house is wood.

Wood is a wonderful resource. Divide the class into six groups. Give three minutes to list everything that is made of wood in:

the classroom

your room at home

the sitting room in your house

the kitchen

on the school grounds

in the school hall

1. What conclusion can you draw from this?

My conclusion is

2. Write to SAPPI to ask for posters for your class.

Bricks

When a house is built most builders use bricks. Complete the following sentences by using the following words .

bulldozers, clay, straw, cheap, difficult, kiln, 10 000, India, bricks, machines, baked, wire, heavy, strong, easy, sun, harder, rots, mud, length

When a house is built builders must make a choice of what they will use to build with.

Stone is …………………. , expensive and ……………….. to work with and

wood ………………….. if one does not maintain it. But bricks can be made

from ………………. or ………………… which are easily obtainable. It is

usually fairly …………………. and …………………. to make bricks. Bricks

are easy to work with and make …………………………. walls.

About ……………….. years ago the first bricks were made in the Middle East.

They were made of mud baked in the sun. The brick makers soon discovered

that if bricks were ……………………. in a fire they became

……………………...

In countries like Malawi and ……………………… mud

bricks are still used. The mud is mixed with ……………………..

and then pressed together and left in

the ………………………………….. to dry.

At brick-kilns in our country so much clay is used that …………………………..

are need to move the clay. The clay is mixed in ………………………… and is

pressed into long tubes. ……………………….. cutters are used to cut the

tubes to the right ……………………..

The bricks are dried and then fired in a ………………….. Modern kilns can make up to 80 000 ……………………. a day.

To write with

Thousands of years ago people used all sorts of ways to write. They used materials from animals, stone, plants and clay. They wrote and drew on papyrus, bark, animal skins and stone.

Today it is much easier. We simply go to the shops and buy the most wonderful writing utensils. All of these are made of different kinds of matter.

Think of someone from the past who has fascinated you. Send a short SMS message to him or her to show how the technology of writing has changed over the years.

Write the message on the cell phone.

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

conducts investigations and collects data:

  • notes and remarks on obvious changes or interesting details.

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

  • categorises information: sorts objects and organisms by a visible property.

LEARNING OUTCOME 3: SCIENCE, SOCIETY AND THE ENVIRONMENT The learner will be able to demonstrate an understanding of the interrelationships between science and technology, society and the environment.

Assessment standard

We know this when the learner

  • understands the impact of science and technology: identifies features of technological devices around him or her, and tells about their purpose and usefulness.

Memorandum

Building materials

  • Natural materials: colour in yellow.
  • Other materials: colour in red.

Bricks: Cloze Technique

  • Heavy,
  • difficult,
  • rotten,
  • mud,
  • clay,
  • cheap,
  • strong,
  • 10 000, baked, harder
  • India, straw, sun
  • Bulldozers, machine, wire, lengths
  • Kiln, bricks

To write with:

  • Children do not know the old ways of writing. If there is time read old-fashioned articles or stories and watch suitable videos.
  • You all know SMS messages well.

Questions & Answers

how to know photocatalytic properties of tio2 nanoparticles...what to do now
Akash Reply
it is a goid question and i want to know the answer as well
Maciej
Do somebody tell me a best nano engineering book for beginners?
s. Reply
what is fullerene does it is used to make bukky balls
Devang Reply
are you nano engineer ?
s.
what is the Synthesis, properties,and applications of carbon nano chemistry
Abhijith Reply
Mostly, they use nano carbon for electronics and for materials to be strengthened.
Virgil
is Bucky paper clear?
CYNTHIA
so some one know about replacing silicon atom with phosphorous in semiconductors device?
s. Reply
Yeah, it is a pain to say the least. You basically have to heat the substarte up to around 1000 degrees celcius then pass phosphene gas over top of it, which is explosive and toxic by the way, under very low pressure.
Harper
Do you know which machine is used to that process?
s.
how to fabricate graphene ink ?
SUYASH Reply
for screen printed electrodes ?
SUYASH
What is lattice structure?
s. Reply
of graphene you mean?
Ebrahim
or in general
Ebrahim
in general
s.
Graphene has a hexagonal structure
tahir
On having this app for quite a bit time, Haven't realised there's a chat room in it.
Cied
what is biological synthesis of nanoparticles
Sanket 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
how did you get the value of 2000N.What calculations are needed to arrive at it
Smarajit Reply
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Berger describes sociologists as concerned with
Mueller Reply
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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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