Everyday Science – Environmental Sciences

The study of the inter-relationships of living organisms with each other and their environment is called.

Ecosystem is the major structural and functional unit of.

The components of an ecosystem are classified into ______ categories.

Producers are plants,which produce food through the process of.

Decomposes are bacteria and fungi which degrade ______ organic matter.

Which is the most abundant gas in the atmosphere ?

________ can make up 4 percent of the atmosphere by volume percent by weight.

The composition of the atmosphere is relatively constant up to about ______ kilomtres above the Earth,s surface.

How many layers,atmosphere has ?

Much of sun,s radiation is either reflected or absorbed by .

The solar constant is the encrgy that crosses each square metre at the top of the atmosphere per.

Most ultraviolet radiation is absorbed by the _____ layer in the stratosphere.

Visible light and radio waves penetrate to Earth,s.

The ozone layer is a naturally occurring ozone found in the stratosphere,situated between _____ kilometers above the Earth,s surface.

Ozone is a derivative of .

Ozone is a/an ____ gas.

The depletion of ozone has been called the.

When did the British atmosphere scientists surveying in Antarctica announce a more than 40 percent decrease in the atmospheric ozone ?

The major damage done to ozone has been attributed to.

Chlorofluoro-carbon gases were introduced about _____ years ago.

Chlorofluoro-carbons are very stable and when they reach _____ kilomtres altitude (where the concentration of ozone is supposed to be highest),they are subjected to intense ultraviolet radiation from the sun.

Which gas quickly destroys ozone ?

When did USA and 22 other nations sign an agreement to reduce consumption of Chlorofluoro carbons ?

Pure rainwater is slightly acid It has a pH of about.

Water and carbon dioxide in air from an acid called.

Acid rain is a direct result of .

______ in the air combine with rain water to from nitric acid and sulfuric acid.

Trout, Salmon and other types of fish are very sensitive to change in.

Acid rain concentrates _____ in water and soil.

Name the global phenomenon in which there is a gradual increase in the temperature of the Earth as a result of pollutants and certain gases in the atmosphere of the Earth.

What is the average temperature of the surface of the Earth?

Most greenhouse models say that the temperature on the surface of the Earth would increase by at least_______ over the next century.

Much of the solar radiation that reaches the surface of the Earth is absorbed in the.

There has been an increase in amount of _____ in the last two and half centuries.

Currently carbon dioxide alone is responsible for _____ of the global warming phenomena .

About _____ of carbon dioxide come from burning of fossil fuel (coal,gas,petroleum).

____comprises only 2 PPM (parts per million)of atmosphere but it is 30 times more effective than carbon dioxide in warming action.

When was Earth Summit held in Brazil in which a treaty was signed to control the production of greenhouse gases?

The temperature of Arctic region is supported to rise on the average by 8*C more than present by the year.

A substance which causes damage to life and ecosystem is called.

For the control of global warming Kyoto Conference was held in Dec 1997,in which _____ countries participated.

_______gases present in the air are more dangerous.They can travel over thousands of kilometers and cause damage to vegetation,animals and human beings over a vast area.

_____ of the population of the world is devoid of clean drinking water,in spite of abundance of water on the Earth.

Clean drinkable water is called.

About how many people die every day because of contaminated water ?

Over _____ % of India,s rivers are over polluted and 90% of child death toll is due to water pollution.

Which wastes come from atomic explosions and nuclear power plants?

During 1980s,________ million tons of solid wastes was dumped into oceans.About 80% of it came through rivers.

Two million sea bird and over 100,000 marine mammals die each year because of the poisoning of.

Between 1946 and ______ a huge amount of radioactive wastes was dumped in the Northern Atlantic and Pacific Ocean as a result of military testing and reprocessing plants.