FOCUS QUESTION
What are some properties of common materials and their everyday uses?
SPECIFIC OBJS.
1. Examine a selection of materials/objects to
determine the transparency, absorbency, strength, magnetic property and heat
conductivity of materials in everyday use.
2. Work cooperatively in groups
CONTENT SUMMARY
Materials exist as solids, liquid or gases.
Materials/objects have different properties, such as transparency absorbency, strength,
magnetic property, and heat conductivity, which determine their everyday use.
Improper disposal of some materials can affect the
environment.
Materials can undergo reversible or irreversible changes.
Irreversible changes cannot be undone and form new materials. Reversible
changes can be undone. Reversible and irreversible changes can be useful in
everyday life.
Substances can change their state by heating and
cooling. Melting, freezing, evaporation
and condensation can cause materials to change state.
ENGAGE
Students will review past lesson on hazardous materials and
why they have to be so stored in their various containers. Tell if all the
materials are the same then.
EXPLORE
Students will watch a youtube video clips on materials to
glean information on the different types of materials and their properties.
Video: Materials 1
Video: Properties of materials
Teacher will highlight terms like transparency, absorbency, strength,
magnetic property and heat conductivity and have students providing their
meanings based on video clips.
In groups students will be given sets of identical materials
to investigate an assigned property:
transparency, absorbency, strength, magnetic property, and heat
conductivity. They will record observation in a table.(Each group will examine
one property) Eg.
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MATERIALS
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PROPERTY : ( E.g.. Absorbency)
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Weak
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Fair
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Strong
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Plastic slippers
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Paper
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Plastic
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Spoon
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Piece of glass
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Plastic ruler
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A T-Shirt
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EXPLAIN
Students will discuss their findings in the different
groups, explaining how they carried out the investigation.
EXTEND/ELABORATE
In groups, students will create a worksheet on Properties
and uses of Materials. They will use materials found in their home/school and
complete a table showing name of material, what it is used for/made from, why
the material is a good choice and the property of the material (eg. Transparent,
absorbent, conductor etc.)
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Material
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Made From
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Property of material
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Justification for its use
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Enamel pot
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Plastic garbage bin
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Clothes iron
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Spoon
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Windscreen
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Video clip: Properties of materials 2
EVALUATE
1.
Which item below represents a good conductor of heat?
(a)
Steel
(b) paper (c) plastic (d)
rubber
Give reasons to support your answer.
____________________________________________
. J June will be going a field trip in the summer to
Dunn’s River Falls. She was told that it is forbidden to climb the falls without
a foot wear. She is undecided as to type foot wear to buy. Which property of
materials should she take into considerations when choosing her footwear? Is it
ABSORBENCY or TRANSPARENCY?
Justify your answer.
______________________________________________________________
3.
Use the words on the left to match the
corresponding statements they refer to on the right.
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COLUMN 1
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COLUMN 2
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Transparency
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Some materials are waterproof and other
materials let water through. This speaks of _______ of material.
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Absorbency
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Some materials are flexible and others are
rigid.
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Strength
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Some materials let heat travel along them.
They are good ____.
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Heat conductivity
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Some materials are see-through
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Malleability
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Some materials are strong while some are weak
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4. Read through the statements below ((a -j). Match each property word below to the statement that best describes or explains it then complete the table with an example of an object that you know of, or have used, which has this property.
PROPERTIES OF MATERIALS
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absorbent conductive elastic flexible magnetic metallic strong translucent transparent waterproof
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Statement
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Property
word
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Example
of object
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a)
Is shiny, strong, malleable, a conductor
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b)
Is attracted to magnets
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c)Takes
in or soaks up liquids easily
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d)
Allows some light to pass through
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e)Allows
heat and electricity to pass through
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f)
Thing you see through clearly
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g)
Bends easily without breaking
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h)Repels
or resist water so it does not get wet
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i)
Can be stretch and returned to original length
j)
Will not break easily
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5. Granny B went into the kitchen when she saw her granddaughter just about to stir a boiling hot soup with a spoon. Read what Granny B said as she handed Suzette a different spoon.
Use the cartoon to answer the questions below.
(a) Based on Granny B's comment, what type of material do you think Suzette's spoon was made of?
(b) Why would her grandmother give her that warning about that spoon?
(c) What material do you think Granny B's spoon was made of?
(d) Explain how Granny B's spoon might behave differently in the hot soup than Suzette's spoon.
6. Shade the letter beside the correct responses.
The frying pan has two different materials because _____________.
a) the metal part and wooden handle look nice together.
b) the handle can protect your hand from heat
c) the metal part will insulate food when the pan is on the fire
d) wood does not conduct heat easily.
