Matter & Materials Processing NATURAL SCIENCES GRADE 5

Matter & Materials Matter & Materials ProcessingProcessing

NATURAL SCIENCES GRADE 5


When we combine materials, we make new materials

These are generally very different to how they started out separately as raw or natural materials

There are different ways to process materials

There are also numerous reasons why we would want to process materials

What we want to produce obviously influences what type of materials we will use!


Can you think of different situations where we would want to process materials?

FOOD – baking a cake (eggs, flour, butter, sugar, etc.)

BUILDING – making cement, bricks etc.

FUNCTIONALITY – making clay pots

ART – plaster of Paris articles


Whenever we make something, it is important to get the mixture right

When we combine materials, their different properties work together differently

JUST THINK OF A CAKE!NATURAL SCIENCES GRADE 5

New materials that are formed from mixing different types of materials together are

called MIXTURES


Materials that have not yet been processed but that are still in their natural state (in

other words how we found them) are called RAW MATERIALS

WATERSUGAR CANEIRONGOLD


When we combine different materials we then have PROCESSED MATERIALS

An example of this is STAINLESS STEELStainless Steel is made from combining iron with other metals to make a material that does not rustE.g. some types of taps, cooking pots and doctors’ instruments


MATERIALS:Flour Water2 bowls for the flour and waterA bowl for mixingPieces of paper


What do you think will happen when we mix water and flour together?*

Examine the properties of the flour and water before we mix them together. Describe the properties of the flour and water. What do you think will happen when we mix them together?Now experiment with mixing different quantities of water and flour together to make a sticky paste.See if you can stick pieces of paper together using the glue that you have madeGroup Conclusion


http://www.youtube.com/watch?v=zkIhW4zFwYo


http://www.youtube.com/watch?v=zkIhW4zFwYo

What did you learn from doing this activity?

What was important when you mixed the flour and water together?

Getting the mixture to be the right thickness!


MATERIALS:

A packet of jelly powder A bowlA cup for measuringHot and cold water (you may need a kettle as well)A spoon for mixing


Mix all the ingredients together by following the instructions on the jelly packet

Leave your jelly to set in a fridge

ENJOY IT!


http://www.youtube.com/watch?v=eLijkt4rc2w


What does the jelly look like when it is ready? Does jelly have glue in it?(No - it has an ingredient called gelatine

that helps it to stick together. Gelatine is an important ingredient. Without it, the jelly would not set)

What did you learn about mixing materials from making jelly?

- The jelly powder dissolved when it was mixed with the water

- The colour of the water changed - The jelly became stiff when it cooled

down NATURAL SCIENCES GRADE 5

MATERIALS:ClayWater

If you want to make professional pots you will need a pottery wheel and a kiln ( a large

oven for dying and baking pottery)


http://www.youtube.com/watch?v=WGdvzOUXMBo


To reinforce something means to make it stronger

When we mix certain materials we sometimes add in another material to make it stronger

E.g. when making cement or concrete, builders sometimes add in pebbles (small stones)




•https://www.flickr.com/photos/60289822@N03/5550860832/•https://www.flickr.com/photos/87677821@N00/364892044/•https://www.flickr.com/photos/64726139@N03/6041581247/•https://www.flickr.com/photos/41433484@N03/4498717100/

Thunderbolt Kids

http://www.thunderboltkids.co.za/downloads/Grade5_A_English_12-11-2012_smaller.pdf


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Matter & Materials Processing NATURAL SCIENCES GRADE 5