The Biosphere section B Flashcards Preview

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Flashcards in The Biosphere section B Deck (21):
1

what is an ecosystem

an ecosystem includes all living organisms and non living factors within a certain area

2

how do we know that an organism can be classified as living

it has to carrie 1 or more life processes

3

what does living organisms need to survive

*energy
*gas
*water
*soil
*fav temp

4

does other planets meets the requirements of an ecosystem

NO

5

why do some of these non-living factors complete a cycle

to ensure that they never get depleted or polluted and therefore stay usable

6

what s a cycle

A cycle refers to a series of events order and is repeated constantly.

7

what does the atmosphere consists of

*78 % nitrogen
*21 % oxygen
*1 % other gasses

8

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

9

why do _____ need oxygen

nearly all LIVING ORGANISMS need oxygen for respiration in order to survive

10

what role does water play

a very important role in all living organisms as it fulfils various functions.

11

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

12

water is a metabolite in which of the following metabolic processes

*photosynthesis
*digestion
* respiration

13

are all living organisms directly dependent on soil

NO

14

what does plants do for the Earth

Plants release oxygen into the atmosphere which is necessary for all life on Earth

15

what are plants dependent on

On soil for water and nutrient supply as to be anchored

16

what is responsible for cleaning of the soil

Bacteria

17

what happens after living organisms die

the dead material broken down by bacteria into minerals then absorbed by plants

18

what temps are on earth

-100 'C to 50 'C

19

what does the temp in different areas determine

IF :
water is frozen
evaporation
dry or humid

20

what else does water determine

which living organisms are found in a area

21

what does living organisms do

all living are adapted to survive in certain area. Hides, method of respiration the ability to regulate body temp and types of nutrition are only a few factors that will determine which organisms can be found in certain areas