Nutrient Cycle: Questions

Nutrient Cycle Questions:

1. What 'spheres' are involved in nutrient cycling?

The atmosphere, the lithosphere, the biosphere and the hydrosphere.

2. What is the law of conservation of matter or mass?

That matter can neither be created nor destroyed and that nature is essentially a closed system.

3. Why does it matter that nature is basically a 'closed system'?

It matters because since all the elements we rely on to support life on the planet are here and have been here and there isn't any more being shipped to the planet, then we know that in order for life to continue, each cycle must remain in motion.

4. Which elements are most common in living things?

Hydrogen, oxygen, carbon, nitrogen, phosphorus and sulfur.

5.Which