The Biosphere section B Flashcards
what is an ecosystem
an ecosystem includes all living organisms and non living factors within a certain area
how do we know that an organism can be classified as living
it has to carrie 1 or more life processes
what does living organisms need to survive
- energy
- gas
- water
- soil
- fav temp
does other planets meets the requirements of an ecosystem
NO
why do some of these non-living factors complete a cycle
to ensure that they never get depleted or polluted and therefore stay usable
what s a cycle
A cycle refers to a series of events order and is repeated constantly.
what does the atmosphere consists of
- 78 % nitrogen
- 21 % oxygen
- 1 % other gasses
explain nitrogen
Even though nitrogen is not important for gaseous exchange, it forms part of many chemical bonds that are found in various types of food and fertiliser
why do _____ need oxygen
nearly all LIVING ORGANISMS need oxygen for respiration in order to survive
what role does water play
a very important role in all living organisms as it fulfils various functions.
what does water serve as and explain
a solvent : which is important for transport of minerals
a temperature buffer : means it helps an organisms regulate its body temp
metabolite : the chem involved in these reactions
metabolism :collective term for chemical reaction that take place within cells called
Habitat : for many organisms like fish,water birds and many water plants
water is a metabolite in which of the following metabolic processes
- photosynthesis
- digestion
- respiration
are all living organisms directly dependent on soil
NO
what does plants do for the Earth
Plants release oxygen into the atmosphere which is necessary for all life on Earth
what are plants dependent on
On soil for water and nutrient supply as to be anchored
