A good fuel should have many desirable characteristics. Some of them are as follows: 1. It should produce a high amount of energy for each unit of mass or volume. 2. It should be easily available and should be easy to transport. 3. It should be economical.
A good fuel should have many desirable characteristics. Some of them are as follows:
1. It should produce a high amount of energy for each unit of mass or volume.
2. It should be easily available and should be easy to transport.
3. It should be economical.
Ozone layer protects life on our earth from harmful rays (U.V. rays) of sun by absorbing these rays. Damage of Ozone layer leads to decrease in absorption of harmful rays of sun due to which these harmful rays reaches to earth's surface and cause harmful effects, so it is necessary to control this dRead more
Ozone layer protects life on our earth from harmful rays (U.V. rays) of sun by absorbing these rays. Damage of Ozone layer leads to decrease in absorption of harmful rays of sun due to which these harmful rays reaches to earth’s surface and cause harmful effects, so it is necessary to control this damage.
Steps being taken to limit this damage are –
(i)To protect ozone layer, the United Nations environment program forged an agreement to freeze CFC production at 1986 levels.
(ii)Chlorofluoro carbons are now being replaced by hydro-fluorocarbons which do not damage the ozone layer.
Even if all the waste we generate is biodegradable, it will have an impact on the environment. This is because too much biodegradable waste cannot be broken down into harmless simpler substances by the decomposers like micro-organisms at the right time. Due to this, the biodegradable wastes will goRead more
Even if all the waste we generate is biodegradable, it will have an impact on the environment. This is because too much biodegradable waste cannot be broken down into harmless simpler substances by the decomposers like micro-organisms at the right time. Due to this, the biodegradable wastes will go on accumulating in the environment and act as pollutants resulting in harmful effects on the environment. For example, the rotting biodegradable waste act as breeding grounds for flies and cockroaches, etc., which spread diseases. Moreover, the rotting biodegradable waste emit foul smell in the environment which makes the life of people miserable.
Non biodegradable wastes cause many problems like - (i)Enter in food chain and damage the organisms of highest trophic level. (ii)Cause toxic effects to living organisms and may cause pollution like soil pollution, water pollution and air pollution in the environment. (iii)Reduced crop yield. (iv)InRead more
Non biodegradable wastes cause many problems like –
(i)Enter in food chain and damage the organisms of highest trophic level.
(ii)Cause toxic effects to living organisms and may cause pollution like soil pollution, water pollution and air pollution in the environment.
(iii)Reduced crop yield.
(iv)Increase Biological oxygen demand.
When any harmful chemical like DDT enters in a food chain, its concentration increases gradually at each trophic level. This phenomenon is known as Biological magnification. Yes, the level of biological magnification is different for different levels. In trophic level I concentration of harmful chemRead more
When any harmful chemical like DDT enters in a food chain, its concentration increases gradually at each trophic level. This phenomenon is known as Biological magnification. Yes, the level of biological magnification is different for different levels. In trophic level I concentration of harmful chemical is less than other trophic level and in last trophic level concentration of harmful chemical is high.
For eg :- Plant → Goat→ Man
In the above food chain, plants have minimum concentration of chemicals (Pesticides) and in Man , Concentration of chemical is high.
(a) Yes, the impact of removing all the organisms in a trophic level will be different for different trophic levels. For eg : - Grass →→ Rabbit →→ Tiger : In the above food chain : - (i) If we remove all the tigers at the third trophic level, then the number of rabbits will increase and these rabbiRead more
(a) Yes, the impact of removing all the organisms in a trophic level will be different for different trophic levels.
For eg : – Grass →→ Rabbit →→ Tiger :
In the above food chain : –
(i) If we remove all the tigers at the third trophic level, then the number of rabbits will increase and these rabbits will eat up all the grass and plants forest becomes desert.
(ii) If we remove all the rabbits at the second trophic level, then tigers will not get food and due to starvation they will die.
And, also the amount of grass and plants increase.
(b) No, all the organisms of any trophic level cannot be removed without causing any damage to the ecosystem.
If we kill all the organisms in one trophic level then transfer of food and energy to next level will stop.For eg. Plants--> Rabbit--> Wolf--> Tiger If, in the above food chain, we kill the grasshoppers or Trophic level II organisms then transfer of energy from plants (Trophic level I)Read more
If we kill all the organisms in one trophic level then transfer of food and energy to next level will stop. For eg.
Plants–> Rabbit–> Wolf–> Tiger If, in the above food chain, we kill the grasshoppers or Trophic level II organisms then transfer of energy from plants (Trophic level I) to snake (Trophic level III) will stop.
(i) We should use more and more substances that leave biodegradable wastes. (ii) We should reduce the use of non-biodegradable wastes like plastics or recycle them.
(i) We should use more and more substances that leave biodegradable wastes.
(ii) We should reduce the use of non-biodegradable wastes like plastics or recycle them.
Ozone is a gas made up of three atoms of oxygen joined together. i.e.O3. Between 20 – 26 km above the sea level, ozone forms a layer known as ozone layer. This ozone layer absorbs the harmful U.V. radiations of the sunlight and hence, protects the earth and living organisms from the harmful effectsRead more
Ozone is a gas made up of three atoms of oxygen joined together. i.e.O3.
Between 20 – 26 km above the sea level, ozone forms a layer known as ozone layer.
This ozone layer absorbs the harmful U.V. radiations of the sunlight and hence, protects the earth and living organisms from the harmful effects of U.V. rays.
So, this layer is very important for the survival and existence of life on earth. Thus, it protects the ecosystem.
What is a good fuel?
A good fuel should have many desirable characteristics. Some of them are as follows: 1. It should produce a high amount of energy for each unit of mass or volume. 2. It should be easily available and should be easy to transport. 3. It should be economical.
A good fuel should have many desirable characteristics. Some of them are as follows:
See less1. It should produce a high amount of energy for each unit of mass or volume.
2. It should be easily available and should be easy to transport.
3. It should be economical.
What is a good source of energy?
A good source of energy should be renewable and environment-friendly .
A good source of energy should be renewable and environment-friendly .
See lessWhy is damage to the ozone layer a cause for concern? What steps are being taken to limit this damage?
Ozone layer protects life on our earth from harmful rays (U.V. rays) of sun by absorbing these rays. Damage of Ozone layer leads to decrease in absorption of harmful rays of sun due to which these harmful rays reaches to earth's surface and cause harmful effects, so it is necessary to control this dRead more
Ozone layer protects life on our earth from harmful rays (U.V. rays) of sun by absorbing these rays. Damage of Ozone layer leads to decrease in absorption of harmful rays of sun due to which these harmful rays reaches to earth’s surface and cause harmful effects, so it is necessary to control this damage.
See lessSteps being taken to limit this damage are –
(i)To protect ozone layer, the United Nations environment program forged an agreement to freeze CFC production at 1986 levels.
(ii)Chlorofluoro carbons are now being replaced by hydro-fluorocarbons which do not damage the ozone layer.
If all the waste we generate is biodegradable, will this have no impact on the environment?
Even if all the waste we generate is biodegradable, it will have an impact on the environment. This is because too much biodegradable waste cannot be broken down into harmless simpler substances by the decomposers like micro-organisms at the right time. Due to this, the biodegradable wastes will goRead more
Even if all the waste we generate is biodegradable, it will have an impact on the environment. This is because too much biodegradable waste cannot be broken down into harmless simpler substances by the decomposers like micro-organisms at the right time. Due to this, the biodegradable wastes will go on accumulating in the environment and act as pollutants resulting in harmful effects on the environment. For example, the rotting biodegradable waste act as breeding grounds for flies and cockroaches, etc., which spread diseases. Moreover, the rotting biodegradable waste emit foul smell in the environment which makes the life of people miserable.
See lessWhat are the problems caused by the non-biodegradable wastes that we generate?
Non biodegradable wastes cause many problems like - (i)Enter in food chain and damage the organisms of highest trophic level. (ii)Cause toxic effects to living organisms and may cause pollution like soil pollution, water pollution and air pollution in the environment. (iii)Reduced crop yield. (iv)InRead more
Non biodegradable wastes cause many problems like –
See less(i)Enter in food chain and damage the organisms of highest trophic level.
(ii)Cause toxic effects to living organisms and may cause pollution like soil pollution, water pollution and air pollution in the environment.
(iii)Reduced crop yield.
(iv)Increase Biological oxygen demand.
What is biological magnification? Will the levels of this magnification be different at different levels of the ecosystem?
When any harmful chemical like DDT enters in a food chain, its concentration increases gradually at each trophic level. This phenomenon is known as Biological magnification. Yes, the level of biological magnification is different for different levels. In trophic level I concentration of harmful chemRead more
When any harmful chemical like DDT enters in a food chain, its concentration increases gradually at each trophic level. This phenomenon is known as Biological magnification. Yes, the level of biological magnification is different for different levels. In trophic level I concentration of harmful chemical is less than other trophic level and in last trophic level concentration of harmful chemical is high.
See lessFor eg :- Plant → Goat→ Man
In the above food chain, plants have minimum concentration of chemicals (Pesticides) and in Man , Concentration of chemical is high.
Will the impact of removing all the organisms in a trophic level be different for different trophic levels? Can the organisms of any trophic level be removed without causing any damage to the ecosystem?
(a) Yes, the impact of removing all the organisms in a trophic level will be different for different trophic levels. For eg : - Grass →→ Rabbit →→ Tiger : In the above food chain : - (i) If we remove all the tigers at the third trophic level, then the number of rabbits will increase and these rabbiRead more
(a) Yes, the impact of removing all the organisms in a trophic level will be different for different trophic levels.
See lessFor eg : – Grass →→ Rabbit →→ Tiger :
In the above food chain : –
(i) If we remove all the tigers at the third trophic level, then the number of rabbits will increase and these rabbits will eat up all the grass and plants forest becomes desert.
(ii) If we remove all the rabbits at the second trophic level, then tigers will not get food and due to starvation they will die.
And, also the amount of grass and plants increase.
(b) No, all the organisms of any trophic level cannot be removed without causing any damage to the ecosystem.
What will happen if we kill all the organisms in one trophic level?
If we kill all the organisms in one trophic level then transfer of food and energy to next level will stop.For eg. Plants--> Rabbit--> Wolf--> Tiger If, in the above food chain, we kill the grasshoppers or Trophic level II organisms then transfer of energy from plants (Trophic level I)Read more
If we kill all the organisms in one trophic level then transfer of food and energy to next level will stop.
For eg.
Plants–> Rabbit–> Wolf–> Tiger
See lessIf, in the above food chain, we kill the grasshoppers or Trophic level II organisms then transfer of energy from plants (Trophic level I) to snake (Trophic level III) will stop.
How can you help in reducing the problem of waste disposal? Give any two methods.
(i) We should use more and more substances that leave biodegradable wastes. (ii) We should reduce the use of non-biodegradable wastes like plastics or recycle them.
(i) We should use more and more substances that leave biodegradable wastes.
See less(ii) We should reduce the use of non-biodegradable wastes like plastics or recycle them.
What is ozone and how does it affect any ecosystem?
Ozone is a gas made up of three atoms of oxygen joined together. i.e.O3. Between 20 – 26 km above the sea level, ozone forms a layer known as ozone layer. This ozone layer absorbs the harmful U.V. radiations of the sunlight and hence, protects the earth and living organisms from the harmful effectsRead more
Ozone is a gas made up of three atoms of oxygen joined together. i.e.O3.
See lessBetween 20 – 26 km above the sea level, ozone forms a layer known as ozone layer.
This ozone layer absorbs the harmful U.V. radiations of the sunlight and hence, protects the earth and living organisms from the harmful effects of U.V. rays.
So, this layer is very important for the survival and existence of life on earth. Thus, it protects the ecosystem.