ecosystems

Question 1

what is an ecosystem?

Answer 1

An ecosystem is the interacting system in which living organisms interact with non-living physical environment.

Question 2

what are the abiotic factors of an ecosystem?

Answer 2

-inorganic substances: nutrients such as carbon di oxide, oxygen, nitrogen, water and all the other minerals.
-organic compounds: proteins carbs, fat. thee are present in living organisms and link the abiotic compounds and the biotic compounds
-climatic factors:
-atmospheric factors:temp, rainfall, light, humidity
- edaphic factors: soil

Question 3

what is a food chain

Answer 3

a food chain is a diagram or a chain showing what animals eat or chain showing the process of eating and eaten.

Question 4

what is a food web

Answer 4

the network of interconnected food chains is known as the food webs

Question 5

what are trophic levels

Answer 5

the various links or steps representing organisms in a food chain at which the transfer of food takes place are called trophic levels

Question 6

what is an ecological pyramid

Answer 6

an ecological pyramid is a graphic representation of an ecological parameter like number of individuals biomass or energy present at various trophic levels of a food chain.

Question 7

what are three aspects of an ecological pyramid

Answer 7

-number of individuals
-amount of biomass
-amount of energy

Question 8

what is atmosphere

Answer 8

the envelope of air that surrounds the Earth is called atmosphere

Question 9

name the layers of the atmosphere in order

Answer 9

-troposphere
-stratosphere
-mesosphere
-thermosphere

Question 10

describe the stratosphere

Answer 10

10-60km an be 80km
-density is less than troposphere
-temp increases with height -55c to 0
-contains ozone layer that traps harmful UV rays
UV rays can cause cataract cancer inflammatory diseases

Question 11

describe the troposphere

Answer 11

-upto 10km
-highest density
-temp decreases with height +15c to -55c
-has most atmospheric air

Question 12

describe the mesosphere

Answer 12

-60-100km
-low density
-deceases with height 0-90c
-protects earth from rocky celestial masses

Question 13

describe the thermosphere

Answer 13

-100+km
-extremely ow density
-increses wth height
-90c to 300c

Question 14

what is wind

Answer 14

air in motion

Question 15

what happens in the absence of wind

Answer 15

a layer of smoke

Question 16

what happens in the wonter

Answer 16

smoke combines with fog to form smog that causes eye irritation headache

Question 17

what is weather

Answer 17

daily phenomenon of temp clouds rainfall and sunlight

Question 18

what is climate

Answer 18

climate is determind by observing the weather of place over a long period of time

Question 19

what is symbiosis

Answer 19

it is the living together of two or more organisms of different species in an intimate association in which both partners benefitted.
eg: lichens algae and fungi algae provides food and fungi provides shelter

Question 20

what is paratism

Answer 20

a relationship between two living organisms where one organism benefits at the expense of another

Question 21

what is statification

Answer 21

the vertical distribution of liing organisms in different layers

Question 22

what is a food chain

Answer 22

food chain is a chronological pathway or an order that shows the flow of energy from one
organism to the other.In a community which has producers, consumers, and decomposers, the
energy flows in a specific pathway.