8.4 Composite

What is the meaning of composite material?

• A composite material is a material made from combining two or more non-homogeneous substances, that is matrix substance and strengthening substance

• Reinforced concrete is widely used in the construction of bridges, dams and buildings.

• The innermost layer is the core that is made up of silica glass fibres (strengthening substance)

• This composite material has replaced copper wires in video cameras and connects computers in Local Area Network (LAN).

Why is wood classified as a composite material?

• A composite material is a material made from combining two or more non-homogeneous substances, that is matrix substance and strengthening substance.

• The matrix substance surrounds and binds the strengthening substance together.

• Composite materials are widely used in the development and advancement of technology nowadays.

• The innermost layer is the core that is made up of silica glass fibres (strengthening substance). T

Why is teeth classified as a composite material?

• A composite material is a material made from combining two or more non-homogeneous substances, that is matrix substance and strengthening substance.

• Fibre glass is produced when plastic (matrix substance) is strengthened with glass fibres (strengthening substance)

• made up of hydroxyapatite and collagen

• The innermost layer is the core that is made up of silica glass fibres (strengthening substance). T

How many types composite materials?

• 4

• 3

• 6

• 5

Used in the construction of bridges, dams and buildings.

Based on the statement above, choose the types of composites materials.

• Photochromic glass

• Optical fibre

• Fibre glass

• Reinforced concrete

This composite material is used to make helmets, car bumpers and printed circuit boards

Based on the statement above, choose the types of composites materials.

• Photochromic glass

• Optical fibre

• Fibre glass

• Reinforced concrete

Based on the diagram above, choose the types of composites materials.

• Photochromic glass

• Optical fibre

• Fibre glass

• Reinforced concrete

Based on the diagram above, choose the types of composites materials.

• Photochromic glass

• Optical fibre

• Fibre glass

• Reinforced concrete

Composite material are used in particle accelerators and involved in Nuclear Magnetic Resonance (NMR) machines and Magnetic Resonance Imaging (MRI) machines.

Based on the statement above, choose the types of composites materials.

• Superconductors

• Reinforced concrete

• Fibre glass

• Optical glass

Concrete is an example of composite material that has been used since ancient times.

Is concrete suitable to be used to build the pillars of buildings? Explain.

• Combination of two or more non-homogeneous substances

• The stretching weakness of concrete can be strengthened by inserting steel rods in concrete. The steel rods are not brittle because it can withstand stretching

• Not suitable. Concrete is resistant to compression but is brittle due to its weak stretching strength

• Matrix substance: plastic; Strengthening substance: fibre glass