science hk2 9e

The reaction that joins monomer molecules together to form a polymer.

• polymerisation

• bond

• polymer

• impurity

Not decomposed (broken down) by organisms in the soil

• endothermic

• greenhouse gas

• non - biodegradable

• synthetic polymer

exothermic

• A substance that binds materials together. In building it refers to a mixture of clay and lime (calcium oxide)

• A change or reaction that transfers energy into the surroundings, making the temperature of the surroundings rise.

• Breaking down a compound into simpler substances using heat.

• A change or reaction that absorbs energy from the surroundings, making the temperature of the surroundings fall.

A substance made by the chemical industry that is made up of very long molecules containing repeating groups of atoms.

• landfill site

• lattice structure

• raw material

• synthetic polymer

The warming effect on the earth's surface caused by greenhouse gases absorbing energy emitted from the warm surface of the earth and re-emitting it back to the surface

• composite material

• greenhouse gas

• climate change

• global warming

aggregate

• Artificial stone made from a mixture sand, cement, water, and larger pieces of material such as gravel or small stones (aggregate).

• Gravel, small stones or pieces of crushed rocks used in building.

• A substance that is typically convertible into polymers

• A force that holds some atoms tightly together.

An unwanted substance that is found mixed into a useful substance

• impurity

• vulcanisation

• incomplete combustion

• fibre

A force that holds some atoms tightly together

• bond

• brittle

• uncreative

• sand

Very fine particles of rock.

• heat resistant

• crystal

• clay

• plastic

polymer

• A substance made up very long molecules containing repeating groups of atoms.

• A small molecule that can join with other molecules like itself to form a polymer.

• When rubber is heated with sulfur. The sulfur forms cross-links between the rubber molecules, changing the material’s properties.

• Any substance that will return to its original shape and size after it has been stretched or squashed.