Systems and Cycles Flashcards
What are the various plant and animal species that live together?
The living things or biotic elements
What does the physical environment comprise of?
Many non living things such or abiotic elements such as water, earth, minerals, and air which form part of the hydrosphere, lithosphere and atmosphere
What are nutrients and energy transferred by?
Food chains and food webs.
Why do food chains best describe human activities?
We eliminate the competition.
Define autotrophs?
Organisms which produce their own food.
Define heterotrophs.
All other organisms depending on other organisms for a food source.
Define biogeochemical.
A pathway by which a chemical substance moves through both biotic and abiotic compartments of Earth.
Define gaseous cycles?
Involve a the transportation of matter through the the atmosphere.
Define sedimentary cycles.
Involve the transportation of matter through the ground to water, from the lithosphere to the hydrosphere.
Define ecosystems.
Communities of living things which interact within and with their physical environment.
