Chapter 13.5 Flashcards
what is the oxygen cycle composed of?
abiotic factors:
- oxygen
- carbon dioxide
- sun
processes:
- photosynthesis
- cellular respiration
what is the purpose of the oxygen cycle?
recycle oxygen to allow plants and animals to survive
why is the oxygen cycle important?
it allows living things to survive by breathing and making their own food.
what is the purpose of the carbon cycle?
to exchange and recycle carbon through the atmosphere.
what is the carbon cycle composed of?
biotic factors:
- animals
- plants
abiotic factors:
- sunlight
- water
- pollution
why is the carbon cycle important?
carbon is the building blocks of life. carbon is an essential component of carbohydrates, proteins, fats, and all other organic molecules.
what is the purpose of the hydrologic cycle (water cycle)?
to recycle water
what is the hydrologic cycle composed of?
biotic factors:
- plants
- human
abiotic factors:
- water
- sunlight
Why is the hydrologic cycle important?
without water, plants and animals will not be able to survive and the ecosystem will die.
what is the purpose of the nitrogen cycle?
to recycle nitrogen for use in chemical reactions.
what is the nitrogen cycle composed of?
abiotic factors:
- soil
- nitrogen
- atmosphere
biotic factors:
- plants
- animals
- bacteria
- fungi
why is the nitrogen cycle important?
78% of earths atmosphere is made of nitrogen and is needed for certain processes.
creates forms of nitrogen that can be used by organisms.
what is the purpose of the phosphorus cycle?
to recycle phosphorus
what is the phosphorus cycle composed of?
biotic factors:
- animals
- plants
- dead animals
abiotic factors:
- soil
- water
- rocks
why is the phosphorus cycle important?
organic compounds need phosphate to grow.
