The Clock of Eras is a graphic aid used by Montessori to help us visualize geologic time by relating it to a clock. The pre-requisite for this presentation is that children can read the time on an analog clock.
No previous Montessori skills, training, or resources required!
Using the clock, we can see at a glance the relative time lengths of each major geologic era.
Each hour represents approximately 375 million years.
Each eon or era has a particular colour, and relevant ones correspond to the colours on the Time Line of Life
→Black indicates the absence of knowledge
→Yellow for the dawning of life
→Blue for the life forms developed in water
→Brown for life forms arriving on land
→Green for the explosion of vegetation and life
→Red for something new (Humans)
This material is suitable for any classroom, homeschool, or educational environment – you do not have to be a Montessori teacher. Save yourself HOURS of work.
Cut out the diagram and the arrow labels to add visual interest while telling the story.