Sociology - stratification and social class help

Is your exam board OCR?

Hi there,

desperately needing help on the key terms used on how to describe different social classes
- closed/open society
- ascribed/achieved status
- absolute/relative mobility
- intergenerational/intragenerational mobility
- social closure
- meritocratic society

Also I have just come across a study on mobility by David Glass 1954 which he 'found evidence of short range social mobility, equally upward and downward' Also another keyword Im stuck on is 'long range social mobility'

If someone could please help me with this or equally lend me notes on stratification and social class I'll forever be grateful - im reading through my own notes completely LOST

Thanks!