453779
Descrição
Mapa Mental por nicole_j_baldwin, atualizado more than 1 year ago
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Criado por nicole_j_baldwin
quase 11 anos atrás
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C2 - Material Choices
- Natural and Synthetic materials
- All materials are made of chemicals
- Made from atoms or groups of atoms (molecules)
- Made from atoms or groups of atoms (molecules)
- natural
- Materials from plants
- Wood and
paper from
trees
- Cotton from
cotton plant
- Wood and
paper from
trees
- From anilmals
- Wool from sheep
- Silk from
silkworm
larvae
- Leather from cows
- Wool from sheep
- Materials from plants
- Synthetic -
made by
humans
- can control porperties
- Rubber altered in a factory
- Nylon and Polyester for clothes
- Waterproofing,
stretchy, sparkly
- Waterproofing,
stretchy, sparkly
- Paints
- Rubber altered in a factory
- Raw materials used to
make synthetic materials
come from the Earth's crust
- can control porperties
- All materials are made of chemicals
- Materials and Properties
- Melting and boiling points
- The temperature at which a:
solid turns to liquid or a
liquid turns to gas
- The temperature at which a:
solid turns to liquid or a
liquid turns to gas
- Strength
- The ability to resist a force before breakage or deformation
- Tensile
- Pulling force
- Ropes and cables
- Ropes and cables
- Pulling force
- Compressive
- Pushing force
- Concrete for construction
- Concrete for construction
- Pushing force
- Tensile
- The ability to resist a force before breakage or deformation
- Stiffness
- Inflexibility
- Inflexibility
- Hardness
- Difficulty to cut
into a material
- Hard = Diamond
- Hardest naturally occuring material
- Hardest naturally occuring material
- Soft = Paper
- Hard = Diamond
- Difficulty to cut
into a material
- Density
- Materials mass
per unit volume
- eg. g/cm3
- eg. g/cm3
- Buoyancy
- Objects which
are less dense
than water will
float
- Objects which
are more dense
than water will
sink.
- Objects which
are less dense
than water will
float
- Materials mass
per unit volume
- Melting and boiling points
- Material's Properties and Uses
- Uses for materials depend on the
material's properties
- Examples
- Plastics
- Hard, Strong and Stiff
- Low density (lightweight)
- Mouldable
- Cases for
TVs,
Computers
and Kettles
- Hard, Strong and Stiff
- Rubber
- Strong
- Mouldable
- Car
Tyres
- Strong
- Nylon Fibres
- Soft and Flexible
- Good tensile strength
- Ropes
and
Clothing
- Soft and Flexible
- Plastics
- Examples
- Properties of a
product depend
on the materials
- Suitablity of
material for use
- Cooking utensils
- Non toxix,
high melting
point
- Non toxix,
high melting
point
- Toy car
- non toxic,
strong, stiff and
low density
- non toxic,
strong, stiff and
low density
- Cooking utensils
- Uses for materials depend on the
material's properties
- Nanotechology
- Nanomaterials are tiny
- 1nm = 0.000 000 001m
- 1-100 nanometres across
are nanoparticles
- Natural
- Sea-spray
- Combustion
produces nano
particulates
- Sea-spray
- Different properties than
larger particles of the
same chemical
- Sliver cant
kill bacteria
due to its
lower surface
area to
volume ratio
- Sliver cant
kill bacteria
due to its
lower surface
area to
volume ratio
- 1nm = 0.000 000 001m
- Branch of technology dealing with nanoparticles
- Design nanomaterials for specific uses
- Strengthening sports
materials such as tennis
rackets, golf clubs and
golf balls.
- Silver particles in
surgical masks and
plasters giving
antibacterial properties
- Strengthening sports
materials such as tennis
rackets, golf clubs and
golf balls.
- Design nanomaterials for specific uses
- Ethics
- Effects of
nanoparticles
are unknown
- Testing is important
- Long
term risks
cannot be
tested
- Clearly labled so that consumers
can choose to use or not use
- Clearly labled so that consumers
can choose to use or not use
- Testing is important
- Effects of
nanoparticles
are unknown
- Nanomaterials are tiny
- A
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