Hello children! Today,
we are going to learn some properties of
materials. But before that, we have to revise all what we have learnt! Do
you remember the different materials? You can find them in the song of the last
post!! So we have metal, wood, plastic, fabric, glass and paper. Do you
know what is a table made of? and what is a spoon made of? It is made of...? For
example, a chair is made of wood and fabric, a shelf is made of wood too, a fork
is made of metal, magazines and books are made of paper, clothes are made of
fabric, windows are made of glass, your backpacks are made of plastic, etc.
Ok! Through the
following power-point presentation you will revise the different materials. You
have to think the material or materials which the objects are made of. Are you
ready?
Now, we are going to revise natural and manufactured materials! Do you remember them? Natural materials come from the ground or from living things. Manufactured materials are made by people. We use natural materials to make them. Can you classify the following pictures in natural or manufactured materials? Think and write them in your natural science notebook!
Ok, now we are
going to learn some properties of
materials. So materials have different properties: they look and feel
different. They can be hard/soft,
smooth/rough, bendy/rigid, shiny/dull and waterproof/leaky. Also you have to know that materials you can see
through are transparent and materials you cannot see through are opaque.
For example the glass is transparent and we can see it in the windows. The wood
is opaque because we cannot see through it. Can you find four transparent
objects and four opaque objects in your house? Draw and write them in you
natural science notebook!
Ok, we are going to
focus on the following properties of materials: hard/soft, smooth/rough, bendy/rigid, shiny/dull and waterproof/leaky. For example:
- A table is very hard but the cotton is very
soft.
- An elastic band is
bendy and a pencil is rigid.
- The silver is
shiny because it is bright, but the wood doesn't bright so the wood is dull.
- We can use a
waterproof to impede that the rain gets us wet. But if we use coat, we will get wet, because a coat id
leaky.
Look the following
pictures! You can find some examples of different properties:
In the following
link you can play and investigate some properties of materials!! You have to
prove different materials and experiment with their properties!! The next day
in class you have to explain the reactions
of the materials according to their properties. Enjoy!
http://www.bbc.co.uk/schools/scienceclips/ages/7_8/characteristics_materials_fs.shtml
Ok, now it is your turn!!! You have to
investigate the different properties of materials of some objects in
your house!! Later, you have to explain in class how you have proved the
different properties of materials, and in what objects!! When you have
finished, you have to choose five objects which have, at least, three
properties!!! You have to investigate
the different properties of materials in your house and draw the objects in the notebook and explain in class
the different properties which have.
Finally, you have
to complete this mind-map and provide some examples of the different properties:
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