Earth's Changing Surface: Tutorial
Question 2: Analyze Fossil Layers
This diagram shows three layers of rock.
Layer A (sedimentary)
Segmented worm
Peripatus lived 570
million years ago
Layer B (sedimentary)
No fossils
Layer C (sedimentary)
Trilobite: Shumardia
Lived 498.5-445.6
million years ago
Part A
What is unusual about the arrangement of the fossils in the diagram?

The answer is atmosphere. there are four spheres of the earth: 1. geosphere (from greek word 'geo' = ground), 2. hydrosphere (from greek word 'hydro' = water), 3. biosphere (from greek word 'bio' = life), and 4. atmosphere (from greek word 'atmo' = air). a magnetosphere is a region of space around astronomical objects controlled by the magnetic field of that object. through the process of elimination, since lightning is present in the air, it can be found in the atmosphere.