Question

important note on Our environment class 10 .




plzzzzz answer

Answer 1

Heya!!!!!

"OUR ENVIRONMENT"...

Every thing which we are watching is environment including living or non-living things ...

Resources:- Which humans can use for their profit is called resources...

It is types (biotic and abiotic)..

Biotic resources means the resource which obtain from biosphere and which are living...
eg. fisheries

Abiotic resources means the resource which also obtains from biosphere but they are non living ..
eg.. sunlight, air etc..

Biotic and abiotic resources makes a environment..

In an ecosystem all living organism depends on each other and interlinked with each other...
which gives rise to food chains ...see in fig.(1)

when large number of food chains are connected then it will know as food web...
see in fig.(2)

Now a days if our environment gets bad then only and only humans are responsible for it..
Becuse in this modern time humans are getting vry selfish and only thinks about their profit..

Humans. activities leads to environmental problem as depletions of ozone layer.

Deforestation are increasing day by day because humans are cutting large no. of tres for their needs and get profit and not thinking about future generations..

Extinction of animals are increasing day by day becuse of humans are hunting the animals for their needs and profit .
They hunt Rhino(for their horns), hunt tigers (for tehri skin) , hunt elephants (for their teeth) ,hunt stage (for tehri horns)......

In all cases humans are only thinking about themselve not about other animals and future generations..

That's why the condition of our environment is getting bad day by day ...

If humans are responsible for this bad conduction of our environment then only humans can improve it and make our environment good and healthy....


Hope this will help u.✌✌✌✌✌✌....

Answer 2

Ecosystem_
This is a system of interdependencies among various living beings and non-living things in a given habitat.

Components of Ecosystem_
An ecosystem has two types of components, viz. biotic component and abiotic component.

Abiotic Component-
All the non-living things make the abiotic component of an ecosystem. Air, water and soil are the abiotic components.

Air provides oxygen (for respiration), carbon dioxide (for photosynthesis) and other gases for various needs of the living beings.
Water is essential for all living beings because all the metabolic activities happen in the presence of water.
Soil is the reservoir of various nutrients which are utilised by plants. Through plants, these nutrients reach other living beings.
Biotic Component
All living beings make the biotic component of an ecosystem.

Green plants play the role of producers; because they prepare the food by photosynthesis.
Animals and other living beings play the role of consumers; because they take food (directly or indirectly) from plants.
Bacteria and fungi play the role of decomposers; as they decompose dead remains of plants and animals so that raw materials of organisms can be channelized back to the environment.


Food Chain-
A food chain is a simple representation of transfer of energy from the sun to different biotic components of an ecosystem. Sun is the ultimate source of energy. Green plants convert solar energy into chemical energy during photosynthesis. When an animal takes food, this energy is supplied to the animal and the process goes on. A simple food chain can be shown as follows:

Producer → Primary Consumer → Secondary Consumer

Food Web-
Real life cannot be as simple as a food chain shown above. In any ecosystem, there can be many food chains which are interlinked at various levels. Thus, many food chains form a network which is called food web.

Balance in the Ecosystem-
There is a delicate balance in an ecosystem; as far as number of organisms at a particular trophic level is concerned.
An increase or decrease in population of any organism can disturb this balance.
Let us take a hypothetical example to understand this. If all the deer are killed in a jungle, the lions would be left with no food.
This would endanger the existence of lions. Once the lions and deer would be finished, it would result in population explosion of green plants.
If all the lions die in a jungle, it would create another problem.
Since no lion would be left to kill the deer, the population of deer would increase substantially.
This will finish off all the green plants and finally even the deer would be left with no food for them.
Biodegradable Substance
Substances which can be decomposed by microorganisms are called biodegradable substances. All the organic substances are biodegradable.

Non-biodegradable-
Substances which cannot be decomposed by microorganisms are non-biodegradable. All inorganic substances are non-biodegradable. Many synthetic substances are also non-biodegradable.

Ozone Layer Depletion-
Image result for ozone layer depletion class 10

Ozone layer is also known as stratosphere. When ultraviolet radiations act on oxygen, the oxygen gets converted into ozone.

Problems of Waste Disposal-
During our day to day activities, we produce lot of waste. While some of the waste is biodegradable, a large chunk is composed of non-biodegradable substances.
Plastic waste is a serious concern because plastic is non-biodegradable. We need to respect our environment and find out ways to reduce the burden on our environment.



hope it's help you.