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Properties of materials - Coggle Diagram
Properties of materials
Strength:
Ability to be pushed or pulled
w/o breaking or tearing
the strength of a material is the
MAXIMUM LOAD
it can hold
WITHOUT BREAKING
a
STRONG material
can support heavy loads
WITHOUT BREAKING,
Stong material Does not break easily
Wood
Metal
Plastic
(certain types)
a
WEAK material
cannot
withstand heavy loads
wthout breaking
weak material breaks easily
glass(shatters easily)
paper(tears easily)
tissue paper
Strength test
puts weights of constant mass
on the middle of a material
until the material breaks.
the
maximum
amount
of
weights
that the material
can hold
before breaking**
is the strength of the material.
Flexibility:
Ability to bend
w/o breaking
Flexible
material
Bend easily
w/o breaking
Rubber
Fabric
(Cotton, silk, nylon etc)
Plastic
(certain types)
Inflexible /
Stiff material
Breaks when bend
wood
metal
glass
Flexibility test
place a load with the
same mess
on rods/sheets of
different materials
measure the distance
in which the rod/sheet bent
the greater the distance the material bent,
the more flexible the material
Flexibility Test vs Strength Test
flexiibility test puts one load onto the material
and the distance it bent is measured
strength test puts many loads onto the material, until the materials break.
the maximum load that the material held without breaking
is the measured variable
Buoyancy:
Ability to float on water
Ability to float test
Place material in basin of water
to see if they float on water
weights can also be placed on materials that float
to test how well they float
the more weight that can be placed on the material before it sinks,the better the material floats on water
Float
Styrofoam
Plastic
Wood
Sink
Materials
glass
stone
Absorbency:
Ability to absorb water
absorbency test
Strips of Different Materials
with the Same Length and Thickness
are dipped into water on one end
if material is absorbent,
water will be absorbedband travel up the strip
Absorbant Material: High water marking
Waterproof: No water marking
Absorbent materials:
allows water to enter
and be trapped in the material
sponge
paper/tissue paper
fabric
Waterproof materials:
Do not adsorb any water
metal
plastic
glass
Wood is Water Resistant but NOT Waterproof
Some water can enter wood and cause fungi to grow
Transparency:ability to allow light
to pass through
Translucent materials
Eg: Frosted glass, tracing paper, rice paper
allows SOME light to pass through
Opaque materials
Eg: Wood, metal, cardboard
allows NO light to pass throug
Transparent
allows MOST/ALL light to pass through
Eg: Clear glass, clear plastic
Transparency Test
a light source,,usually a torch ,
will shine light on sheets of different material
placed at an equal distance away from the light source
a light sensor is placed behind the sheet of material to measure the amount of light passing through the material