9E. Making Materials

What are some physical properties of ceramics?

• Flexible, heat resistant, and unreactive

• Stiff, heat resistant, and unreactive

• Flexible, heat resistant, and reactive

• Stiff, heat resistant, and reactive

How are atoms bonded in a lattice structure?

• Weak bonds in a fixed, irregular pattern

• Weak bonds in a fixed, regular pattern

• Strong bonds in a flexible, regular pattern

• Strong bonds in a fixed, regular pattern

Describe a polymer

• A compound made of at least two atoms

• A ceramic bonded together by flexible bonds

• A molecule made up of long chains of groups of atoms

• A compound made up of a long chain of molecules

What is the name of the process that uses sulfur and rubber to form crosslinks between them

• Polymerisation

• Vulcanization

• Combustion

• Displacement

Natural polymers are polymers found in nature. What are synthetic polymers made of?

• Raw materials obtained from ores

• Raw materials obtained from crude oil

• Raw materials obtained from natural polymers

• Raw materials obtained from vulcanized rubber

What is polymerisation?

• The process of monomers joining together into chains

• The process of monomers cross-linking with each other

• The process of monomers making a lattice structure

• The process of monomers breaking down into polymers

Describe composite materials

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

• A combination of monomers to make a polymer material

• A combination of compost

• A combination of two or more materials

Describe the thermal decomposition reaction of calcium carbonate?

• CaCO₂ -> CaO + CO₂

• CaCO₃ -> CaO + CO₂

• CaCO₂ -> CaO + CO

• CaCO₃ -> CaCO₂ + CO

Name three substances that damage the environment

• Carbon monoxide, sulfur dioxide, and calcium carbonate

• Carbon monoxide, carbon dioxide, and nitrogen oxide

• Carbon dioxide, sulfur monoxide, and nitrogen

• Carbon monoxide, sulfur monoxide, and carbon