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Natural sciences

The earth and beyond

Properties and uses of materials

Educator section

Memorandum

TYPE OF MATERIAL Metal Ceramic Glass Plastic Fibre
EXAMPLE Iron copper bricks ornaments bottles ashtrays plastic-bowls cotton polyester

(There can be many other examples)

Assignment 10:

4 (Individual)

The newspaper and flour are wet with water. Then they are mixed to make a new material, paper maché. Through this process a new mixture / compound is created.

By mixing certain materials we can create new products.

(There can be many other examples)

Assignment 11:

4 (Individual)

NATURAL MATERIALS SYNTHETIC MATERIALS
cotton, silk, wool linen, etc. polyester, acrylic, viscose, glass fibre

(There can be many other examples)

Leaner section

Content

Activity: to distinguish the most important groups of materials [lo 1.2, lo 1.3, lo 3.2]

  • Materials can be classified in various ways.
  • Let's look at the groups you already know
Type of Material Metal: Ceramics: Glass Plastic: Fibre:
Example ____________ ____________ ____________ ____________ ____________

Mixtures / Compounds

New products are formed when we combine different materials. We can combine water, milk, sugar and coffee powder to make a cup of coffee. We can also combine substances in various ways by mixing them. The appearance and texture of the product usually differs from the original materials. Another example of a mixture is safety glass. A thin plastic layer is sandwiched between two layers of glass.

ASSIGNMENT 10 (INDIVIDUAL)

  • To make something by combining substances (materials).

When we combine newspaper, flour and water we get papier-mâché. Make your own dinosaur in the following way.

Requirements:

Water

Flour

Metal wire

Pair of pliers

Newsprint

Paint and brushes

String

Procedure:

  • Mix one cup of flour with three cups of water.
  • Stir the mixture until it is smooth and creamy.

How to make a wire framework for the dinosaur.

  • Bend the wire into the shape of a dinosaur with the pair of pliers.
  • Fasten the legs and tail to the body with a piece of string.
  • The frame should be able to stand on its own.

Completion:

  • Tear the newsprint into long strips.
  • Soak the strips in the paste.
  • Use the soaked strips to build onto the wire framework.
  • Allow the figure to dry.
  • Complete the dinosaur by painting it.

Conclusion:

In your own words describe the changes that occurred to the newsprint and the flour.

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

Nowadays most clothes are made from a mixture of materials, for example by combining synthetic and natural fibres.

  • Natural substances: Wool, cotton, silk, etc.

Cotton is light and comfortable, but it creases easily and is difficult to iron.

  • Synthetic substances: are made by humans, for example polyester, acrylic, viscose, glass fibre, etc. One can see these names on the labels of clothes. Have a look at the labels on your clothes.

Questions & Answers

what is mutation
Janga Reply
what is a cell
Sifune Reply
how is urine form
Sifune
what is antagonism?
mahase Reply
classification of plants, gymnosperm features.
Linsy Reply
what is the features of gymnosperm
Linsy
how many types of solid did we have
Samuel Reply
what is an ionic bond
Samuel
What is Atoms
Daprince Reply
what is fallopian tube
Merolyn
what is bladder
Merolyn
what's bulbourethral gland
Eduek Reply
urine is formed in the nephron of the renal medulla in the kidney. It starts from filtration, then selective reabsorption and finally secretion
onuoha Reply
State the evolution relation and relevance between endoplasmic reticulum and cytoskeleton as it relates to cell.
Jeremiah
what is heart
Konadu Reply
how is urine formed in human
Konadu
how is urine formed in human
Rahma
what is the diference between a cavity and a canal
Pelagie Reply
what is the causative agent of malaria
Diamond
malaria is caused by an insect called mosquito.
Naomi
Malaria is cause by female anopheles mosquito
Isaac
Malaria is caused by plasmodium Female anopheles mosquitoe is d carrier
Olalekan
a canal is more needed in a root but a cavity is a bad effect
Commander
what are pathogens
Don Reply
In biology, a pathogen (Greek: πάθος pathos "suffering", "passion" and -γενής -genēs "producer of") in the oldest and broadest sense, is anything that can produce disease. A pathogen may also be referred to as an infectious agent, or simply a germ. The term pathogen came into use in the 1880s.[1][2
Zainab
A virus
Commander
Definition of respiration
Muhsin Reply
respiration is the process in which we breath in oxygen and breath out carbon dioxide
Achor
how are lungs work
Commander
where does digestion begins
Achiri Reply
in the mouth
EZEKIEL
what are the functions of follicle stimulating harmones?
Rashima Reply
stimulates the follicle to release the mature ovum into the oviduct
Davonte
what are the functions of Endocrine and pituitary gland
Chinaza
endocrine secrete hormone and regulate body process
Achor
while pituitary gland is an example of endocrine system and it's found in the Brain
Achor
what's biology?
Egbodo Reply
Biology is the study of living organisms, divided into many specialized field that cover their morphology, physiology,anatomy, behaviour,origin and distribution.
Lisah
biology is the study of life.
Alfreda
Biology is the study of how living organisms live and survive in a specific environment
Sifune
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Source:  OpenStax, Natural sciences grade 6. OpenStax CNX. Sep 16, 2009 Download for free at http://cnx.org/content/col11079/1.1
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