the cycling of materials Flashcards
whys the recycling (using again) of materials essential?
as they provide the building blocks for future organisms.
Two cycles that are particularly important for living organisms are:
the carbon cycle and the water cycle.
is carbon present in all living organisms?
YES
when organisms die what happens to the carbon?
the carbon’s recycled so it can be used by future generations.
what does the water cycle describe?
how water moves on, above or just below the surface of our planet between different locations e.g rivers, oceans and the atmosphere.
in order for the water cycle to be completed what has to happen to the water?
the water has to change state.
which of the following is carbon PRESENT in?
all living organisms.
which of the followng isn’t a way carbon enters the atmosphere: photosynthesis, burning of fossil fuels or respiration?
photosynthesis.
when water vapour in the water cycle condenses in the atmosphere what two forms can it take?
rain and snow
what does water do before rising up into the atmosphere?
it evaporates from the Earth’s surface.
in the carbon cycle: there’s carbon being removed from the atmosphere by…
producers (e.g. algae) who use it in photosynthesis.
what do animals obtain by consuming plant matter?
carbon compunds
in the carbon cycle: why is carbon is returned into the atmosphere (as carbon dioxide)?
because of the respiration that happens in plant and animal cells.
in the carbon cycle: when animals and plants die, decomposers return…
the carbon locked in their bodies back to the atmosphere via decay
in the carbon cycle: combustion of fossil fuels is another source of…
carbon entry into the atmosphere.
