Describe Earth as a system in terms of both energy and matter; use simple diagrams to illustrate your description. What are the three abiotic spheres that make up Earth’s environment? Relate these to...

Describe Earth as a system in terms of both energy and matter; use simple diagrams to illustrate your description. What are the three abiotic spheres that make up Earth’s environment? Relate these to the biotic sphere, the biosphere.

Define the great circle and small circle. How do these circles help to establish the shortest route from one place to another?