A group of people or organizations being joined or associated

an oxide containing two oxides per molecule

the ability to recognize the difference between things; treating different groups of people unfairly

having the properties of a magnet, being able to attract.

supplying land with water using pipes

the scientific study of genes, how a living things develop between generations

someone whose job it is to watch or notice things

a long essay; a position taken in an argument supported by a set of reasons

The act of getting or becoming bigger or more over time

to keep something or someone within a limited area so it cannot escape