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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.
The water will not run through the cloth Choose a glass jar and a piece of cloth from an old sheet or handkerchief. Fill the jar with water. Wet the cloth well, stretch it over
Describe the typical conditions neccessary for fossil formation
How did it change from Mendeleev to Mosely?
Disposal of Chemical Wastes : We shall deal with some commonly occurring chemical wastes. If you need to know more details covering the disposal of a wide range of chemicals, you
Define the Peripheral Nervous System The peripheral nervous system or PNS, is a part of the nervous system and consists of the nerves and neurons that reside or extend outside
The Copernican Revolution: The Copernican model consisted of the Sun at the centre with the six planets, Mercury, Venus, the Earth with the Moon-round it, Mars, Jupiter and
Artificial Satellites Tireless Servants in the Sky The space crafts that move in an orbit around the earth are called artificial satellites. Most satellites go around the
a ray of light falls on a transparent slab of refractive index u.if the reflected and refracted rays are mutually perpendicular to each other,find the angle of incidence.
On the day of the summer solstice in the Southern Hemisphere, the sun can be seen overhead at what location around the globe? At Tropic Of Capricorn
Another balloon experiment Stretch a rubber balloon over the neck of a little bottle. Place it in the receiver jar and delete some of the air with the pump. What happens? How d
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