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Q.What is the greenhouse effect?
Some gases like carbon dioxide, methane, nitrous oxide prevent the escape of heat from the Earth's surface by trapping it. This increases the average temperature of the Earth. This is called the green house effect. An increase in the content of such gases would lead to a situation of global warming.
Where to find fossils In some localities fossils may be found in stone quarries or where there are rock out- crops. Try to search someone in the community who knows about fossi
Explain the Functions of Unicellular Organism You might wonder what functions a single-celled organism is capable of performing. Surprisingly, a unicellular organism is able to
Fibre optics: The songs you hear on your transistor, or the pictures you see on your TV are canied from the studios to your home on radiowaves. Telephone calls you make, on th
what types of birds are there
Floating a needle on water Thoroughly dry a steel needle. Place it on the tines of a dinner fork and gently smash the surface of the water in a dish with the fork. If you are c
Miller's Experiment The above theory could be tested by recreating in the laboratory on a small scale, the conditions which must have existed when life originated on the
Military Technology: Important changes were introduced in military technology. Rope and wooden stimps for horsemen were known in India before the thirteenth century. However,
Floating a razor blade Secure a used razor blade of the double edge type. Try floating it on the surface of water. Again watch the surface and see if the surface film dips unde
assignment for natural rubber
Fire extinguishers You would recall the classification of fires dealt. Table summaries the type of extinguisher used for different classes of fire. Table: Summary of fire e
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