the largest division of geological time, lasting hundreds of millions to billions of years

a subdivision of an eon, lasting tens to hundreds of millions of years

a subdivision of an era, lasting millions of years

the smallest measurement of geological time, a subdivision of a period, lasting thousands to millions of years

Geological timescales

Geography

This unit teaches pupils about the physical processes that create and alter different types of rocks and soils over time. Pupils will also develop their understanding of how humans use different rocks and soils and why this can affect geographical patterns of wealth and population.

Rocks, weathering and soil: Why is geology important?

What is the longest unit of geological time?

How far back do geological timescales go?

It helps us understand how continents formed

Why is geology important for understanding Earth’s past?

What do we call molten rock that erupts from a volcano?

Starter Quiz