<< Chapter < Page Chapter >> Page >

Technology

Grade 5

Processing materials

Module 12

Discovering textile fabrics

Background information

People have worn clothes as protection from the elements (heat and cold) since the earliest times of the Stone Age (12 000 B.C.). Stone Age people used animal pelts and parts of plants to make clothes, which means that they used things that occurred naturally in their environment. Animal pelts were joined together with sinews and needles made from bone to make simple garments. Seeds, feathers and husks were used as simple decorations.

Assignment 1

Here you have a sketch of Shaka, the Zulu king who lived in 1825. Consult a reliable source to get the information you need and describe the traditional garments of a Zulu warrior and the material that was used to make each part of his outfit.

[LO 3.1]

Assignment 2

Would you wear a coat made from the pelt of a jaguar nowadays? Provide reasons for your answer.

[LO 3.2]

Background information

The people of Ancient Egyptian started to weave textiles during the Bronze Age (3 000 B.C.). Textile fabrics can be woven from fibres obtained from animals (silk and wool) or plants (cotton and linen) and are used to make coverings and decorations like clothes, mats, blankets, curtains, etc. The development of technology made it possible to use many other fibres and materials to make textiles, so that we nowadays make textiles from textile fibres found in nature (from plants and animals) or from materials made by people (from wood, oil and coal). We therefore have natural and manmade (synthetic) textile fabrics. The first textile fabrics made of plastics (rayon, polyester, nylon, viscose) were produced in England, round about 1850. The manmade synthetic yarns are manufactured in factories, from oil or coal. Chemicals are extracted from these minerals and are made into plastic fibres.

Assignment 3

Sort each of the following objects into natural or manmade: a plastic bag, a fur coat, a wooden bowl, a glass bottle, a polystyrene container, a wooden table.

NATURAL FABRICS MANMADE FABRICS

[l [lo 3.1]

Background information

The advantages of plastics are:

  • It is cheaper to manufacture.
  • It can be processes into many different forms.
  • It can be dyed easily.
  • It is very durable.
  • It lasts very long.

Disadvantages of plastics:

  • It cannot be recycled readily.

Natural fabrics

Natural fabrics can be of animal, plant or mineral origin. Examples of animals that provide fibres for fabrics are sheep, goats, rabbits, camels, silkworms, llamas and horses. Plant fibres are obtained from the bark, leaves, seeds and fruit of particular plants, like cotton, sisal and flax, and coconut fibre from coconuts.

Wool is obtained from sheep by shearing the sheep annually. A sheep provides about four kilograms of wool per year. There are different breeds of sheep and they provide different types of wool. The wool from merino sheep is regarded as the finest and as the best as far as quality is concerned. Merinos are bred mainly in Australia and South Africa because they do very well where the climate is warm and dry. Australia is one of the top wool producing countries in the world.

Questions & Answers

what is biology
Hajah Reply
the study of living organisms and their interactions with one another and their environments
AI-Robot
what is biology
Victoria Reply
HOW CAN MAN ORGAN FUNCTION
Alfred Reply
the diagram of the digestive system
Assiatu Reply
allimentary cannel
Ogenrwot
How does twins formed
William Reply
They formed in two ways first when one sperm and one egg are splited by mitosis or two sperm and two eggs join together
Oluwatobi
what is genetics
Josephine Reply
Genetics is the study of heredity
Misack
how does twins formed?
Misack
What is manual
Hassan Reply
discuss biological phenomenon and provide pieces of evidence to show that it was responsible for the formation of eukaryotic organelles
Joseph Reply
what is biology
Yousuf Reply
the study of living organisms and their interactions with one another and their environment.
Wine
discuss the biological phenomenon and provide pieces of evidence to show that it was responsible for the formation of eukaryotic organelles in an essay form
Joseph Reply
what is the blood cells
Shaker Reply
list any five characteristics of the blood cells
Shaker
lack electricity and its more savely than electronic microscope because its naturally by using of light
Abdullahi Reply
advantage of electronic microscope is easily and clearly while disadvantage is dangerous because its electronic. advantage of light microscope is savely and naturally by sun while disadvantage is not easily,means its not sharp and not clear
Abdullahi
cell theory state that every organisms composed of one or more cell,cell is the basic unit of life
Abdullahi
is like gone fail us
DENG
cells is the basic structure and functions of all living things
Ramadan
What is classification
ISCONT Reply
is organisms that are similar into groups called tara
Yamosa
in what situation (s) would be the use of a scanning electron microscope be ideal and why?
Kenna Reply
A scanning electron microscope (SEM) is ideal for situations requiring high-resolution imaging of surfaces. It is commonly used in materials science, biology, and geology to examine the topography and composition of samples at a nanoscale level. SEM is particularly useful for studying fine details,
Hilary
cell is the building block of life.
Condoleezza Reply
Got questions? Join the online conversation and get instant answers!
Jobilize.com Reply

Get Jobilize Job Search Mobile App in your pocket Now!

Get it on Google Play Download on the App Store Now




Source:  OpenStax, Technology grade 5. OpenStax CNX. Sep 23, 2009 Download for free at http://cnx.org/content/col10979/1.2
Google Play and the Google Play logo are trademarks of Google Inc.

Notification Switch

Would you like to follow the 'Technology grade 5' conversation and receive update notifications?

Ask