Pearson - 9Ec - Composite Materials

What is a composite material?

• A type of metal

• A combination of two or more materials

• A single material with uniform properties

• A material that cannot be molded

What is glass-reinforced plastic (GRP)?

• A solid block of glass

• A type of rubber

• A composite of glass fibres in a polyester resin

• A type of metal alloy

Why are the properties of GRP useful in boat hulls?

• It is heavy and difficult to mold

• It is strong, light, and slightly flexible

• It is made entirely of wood

• It is very brittle

What properties would be needed in a composite used for racing car bodies?

• Soft and flexible

• Transparent and fragile

• Strong and lightweight

• Heavy and rigid

What is concrete made from?

• Pure cement

• Glass and polymer

• Only water and sand

• A mixture of cement, sand, aggregate, and water

What is the role of aggregate in concrete?

• To make it more flexible

• To make it transparent

• To give it strength

• To make it lighter

What happens when zinc carbonate is heated?

• It melts into a liquid

• An endothermic decomposition reaction occurs

• It solidifies

• It turns into a gas

What type of reaction occurs when water is added to the concrete mixture?

• Physical reaction

• Endothermic reaction

• Exothermic reaction

• Chemical reaction

What is the main component of cement?

• Iron oxide

• Aluminum oxide

• Silicon dioxide

• Calcium oxide

What does the thermal decomposition of calcium carbonate produce?

• Calcium and carbon dioxide

• Calcium and oxygen

• Calcium oxide and carbon dioxide

• Calcium hydroxide and carbon