Give six differences between biodegradable and non-biodegradable with examples???

Make a forest, grassland & a an aquatic food chain. Name the various trophic levels

Why forest is called biodiversity hotspot?

1. we do not clean ponds or lakes but an aquarium needs to be cleaned. why?
2. name two salt water system
3. write the fectors foe excessive solid waste genertion.
4. what are coliform bacteria?
5. one example of gRAZING FOOD CHAIN?

In a food chain,if 10000 joules of energy is available to the producer,how much energy will be available to the secondary consumer to transfer it to the tertiary consumer

list examples of photo autotrophs and chemo autotrophs

methods of disposal of non biodegradable waste

 what are the two main components of our environment ?

Draw and explain Khadin system of water harvesting.

what is the full form of DDT ?

Give an example of aquatic food chain. 

What are trophic levels? Give an example of a food chain and state the different trophic levels in it.

 What is 10 percent law? Explain with an example how energy flows through different trophic levels.

wat are the advantages of disposable paper cups over disposable plastic cups?

What is the difference between saprophytes and decomposers?

How can you help in reducing the problem of waste disposal? Give any two methods

What is ozone layer and how does it affect the ecosystem?

Suggest three ways to maintain a balance between environment and development to survive.

difference between detrivores,decomposers and scavengers.

 we do not clean ponds or lakes, but an aquarium needs to be cleaned. why?

what will happen if we kill all the organism in one trophic level?

 what are the advantages of cloth bags over plastic bags during shopping?

Describe any five modes of waste disposal?

Give any 2 -2 ways in which biodegradable and non biodegradable substances affects the environment?

"energy flow in a food chain is unidirectional."justify this statement

What is slogan of chipko movement ?

Write on the damage caused to forests by the following-

a) Building rest houses for tourists in national parks.

b) Grazing domestic animals in national parks.

c) Tourists throwing plastic bottles/covers and other litter in national parks.

which bacteria was found in river ganga water indicating contamination

What is biodiversity. Why it is important to conserve biodiversiy ?

What is the role of decomposers in the ecosystem?

whether leather is biodegradable or non-biodegradable

what limits the number of trophic levels in a food chain?

why food chains generally consists of three or four steps only?

are these two questions one nd the same?

what is biological magnification

What are the effects of non biodegradable substances on the environment??

can i have some slogans on reduce, reuse and recycle...pls @'-,-- ♥

what is the largest biological system in the world?

what is terrestrial ecosystem?

Which of the following constitute a food-chain?

(a) Grass, wheat and mango

(b) Grass, goat and human

(c) Goat, cow and elephant

(d) Grass, fish and goat

 why are crop fields known as artificial ecosystems?

write characteristics of food web?

what is the impact of human activity on environment

If all waste we generate is biodegradable, what impact may this have on the environment?

How increasing demands for the energy adversely affect our environment?

Why are some substances biodegradable and some are non- biodegradable???

 how long are various non biodegradable expected to last in our environment?

Why are green plants called producers?

Briefly describe the food chain and food web and write why is the foodweb more real than food chain ? At least 3 points.

What would happen if there were no decomposers in the ecosystem?

PREVENTION AND CONTROL MEASURES OF OZONE LAYER DEPLETION