Timeline: a long bar with labels on it to show in which year or period something happened.
Decade: a period of ten years.
Century: a period of a hundred years.
Millennium: a period of a thousand years.
Calendar: a way of organising the days, weeks and months of the year.
AD: Anno Domini, the period after Jesus Christ was born.
BC: Before Christ, the period before Jesus Christ was born.
CE: Common Era, a neutral way of describing the period after Jesus Christ was born.
BCE: Before Common Era, a neutral way of describing the period before Jesus Christ was born.
Periods: a way of organising history into smaller timeframes.
Ten ages: these are ten periods that are used to organise history used in the Netherlands.
Stone Age: the time when prehistoric man mostly used tools made of stone.
Bronze Age: the time when prehistoric man learned how to make objects of bronze.
Iron Age: the time when prehistoric man learned how to make objects of iron.