Cycles and Decay Flashcards
How many parts are there to the water cycle
4
What happens to water in the sea (1)
evaporates and coverts to water vapour
What happens to water vapour (2)
Transportation of water vapour from hot to cold
What happens after the water vapour is transported (3)
Precipitation cloud cools and condenses
What happens after rain (4)
Run off back to sea or percolation
How many years ago was earth formed
4.5 billion
How many years ago did life evolve
3.5 billion
What organisms are involved in the carbon cycle
Plants
Animals
Microorganisms
How do plants contribute to carbon cycle
Take in CO2 for photosynthesis
Release CO2 through respiration
Makes fossil fuels if dies in low O2 which are burnt and releases CO2
How do animals contribute to carbon cycle
Eat plants new biomass and use it for respiration (release CO2)
Could become fossil fuels which burnt and release CO2
How do microorganisms contribute to carbon cycle
Decay plants and animals and release CO2 due to respiration in process
What is decay
breaking down complex organic matter into its constituent parts such as simple sugars
What do fungi and bacteria do to cause decay
secrete enzymes outside to digest so they can absorb it
What are the 3 optimum conditions for bacteria/fungi
Oxygen
Warm
Moist