Biosphere Cycle

Front 1

Biosphere

Biosphere means ---

The idea of Biosphere was suggested by---geologist ---, nearly a century ago.

It is estimated that biosphere contains

--- species of plants

and --- species of animal including man.

Back 1

sphere of life.

Austrian geologist Edward Suess

more than three hundred and fifty thousond

eleven million

Front 2

The basic function of biosphere is that ---

The biosphere supplies the essentials

namely----5etc.

for all those species such as ---3

Back 2

it supports life.

Iight, heat, water, food and living space

plants, animal and human beings

Front 3

Biosphere cycle:

Maintenance of the biosphere is possible through constant recycling of materials between the ---and---.

These cycles are: -----5

Back 3

biotic (living) and abiotic (nonliving) components

(i) Hydrological cycle

(ii) Carbon Cycle

(iii) Nitrogen cycle

(iv) The Phosphorus cycle

(v) The Sulphur Cycle

(vi) Oxygen Cycle

Front 4

(i) Hydrological cycle :

The path of --- through --- is hydrological cycle

Back 4

water through environment

Front 5

(ii) Carbon Cycle:

Carbon serves two purposes in the environment:

(1)It is the --- of organic molecules and

(2) it forms the --- for energy storage.

Back 5

structural component

energy holding chemicals bonds

Front 6

(iii) Nitrogen cycle:

Organisms cannot exist without ---4,

all of which are --- containing nitrogen.

Back 6

amino acids,

peptides,

nucleic acids

and proteins

organic molecules

Front 7

(iv) The Phosphorus cycle:

Minerals become available to organisms after they are released from ---.

Phosphorus cycle is one of the mineral cycle begins when phosphorus compounds are leached from ---and--- over long periods of time.

Back 7

rocks

rocks and minerals

Front 8

(v) The Sulphur Cycle:

Sulphur plays a vital role in organisms, especially as a ---.

Sulphur compounds are important determinants of the acidity of.... ---,---and---.

Back 8

minor but essential component of proteins

rainfall,

surface water

and soil

Front 9

(vi) Oxygen Cycle:

Oxygen is the main source of --- for all terrestrial organisms.

Back 9

respiratory gas

Front 10

Carbon or Carbon dioxide cycle

Carbon is --- to life.

It is the basic building block of the ---5 necessary for life.

Back 10

essential

carbo-hydrates,

fats,

proteins,

DNA (Deoxyribo Nucleic Acid)

and other organic compounds

Front 11

The carbon-cycle is based on carbon-dioxide gas,

which makes up ---% of the volume of the troposphere

and is also dissolved in ---.

Back 11

0.036%

water

Front 12

Carbon dioxide is a basic component of nature's ---.

If carbon cycle removes too much CO from the atmosphere, the atmosphere will ---;

if the cycle generates too much, the atmosphere will get ---.

Thus, even slight changes in the carbon cycle can affect --- and ultimately the -----

Back 12

thermostat

cool

warmer

climate

types of life that can exist in various parts of the planet.

Front 13

--- remove CO from the atmosphere and

--- remove it from the water.

Then they use photosynthesis to convert CO into complex --- such as ---.

The cells in oxygen producers, consumers and decomposers then carry out ---.

This breaks down ---and--- and converts the carbon back to CO in the atmosphere or water for ---.

Back 13

Terrestrial producers

aquatic producers

carbohydrates

glucose

aerobic respiration

glucose and other complex organic compounds

reuse by producers

Front 14

This connection between --- in producers and --- in producers, consumers, and decomposers circulates carbon in the biosphere and is a major part of the global carbon cycle.

Back 14

photosynthesis

aerobic respiration

Front 15

So carbon cycle is mainly maintained by the process of ---4 of fossil fuels.

Back 15

photosynthesis,

respiration,

decomposition and

combustion (burning)