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Yogita Ingle 6 years ago
Global warming is the phenomenon of gradual increase in temperature near the Earth’s surface. This phenomenon has been observed over the past one or two centuries. This change has disturbed the climatic pattern of the earth. However, the concept of global warming is quite controversial. But, the scientists have provided relevant data in support of the fact that the temperature of the Earth is rising constantly.
There are several causes of global warming which have a negative effect on human, plant and animal lives. These causes may be natural or might be the outcome of human activities. In order to curb the issues, it is very important to understand the negatives of global warming.
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Meghna Thapar 5 years, 6 months ago
The sun is the most perfectly round natural object known in the universe, say scientists who have conducted precise measurements of its dimensions. As a spinning ball of gas, astronomers had always expected our nearest star to bulge slightly at its equator, making it very slightly flying-saucer shaped. To the eye, the moon appears round, and it's natural to assume that it is actually spherical in shape – with every point on its surface equidistant from its center – like a big ball. Not so. The shape of the moon is that of an oblate spheroid, meaning it has the shape of a ball that is slightly flattened.
Stars are star-shaped because of imperfection in our eyes
Most stars are much like the Sun—giant balls of gas burning billions of miles away. These spherical stars pump out a steady stream of light that crosses vast stretches of space before it illuminates the night sky.
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Sound is a form of energy and it comes from vibrations. These vibrations create sound waves which move through mediums such as air and water before reaching our ears. . . . . . . . .. . . .
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Meghna Thapar 5 years, 9 months ago
Seismograph is an instrument which measures and records the magnitude of an earthquake in terms of the shock waves it produces. The instrument is simply a vibrating rod, or a pendulum, which starts vibrating when tremors occur. A pen is attached to the vibrating system. The pen records the seismic waves on a paper which moves under it. By studying these waves, scientists can construct a complete map of the earthquake.
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Yogita Ingle 6 years ago
Nitrogen Cycle is a biogeochemical process through which nitrogen is converted into many forms, consecutively passing from the atmosphere to the soil to organism and back into the atmosphere.
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With the increase of in global warming and the disruption of temperature in the recent times it is noticed that a number of animals are becoming extinct or moving among the endangered species.
The wild buffaloes in this care are termed as an endangered species because its population is diminishing.
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The term “autotrophic” is formed by the combination of two terms, “auto” meaning self, and “trophic” meaning nutrition. The literal meaning of this term is self-nutrition.
Posted by Sumit Kumar 6 years, 1 month ago
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Yogita Ingle 6 years, 1 month ago
A cone is a three-dimensional shape in geometry that narrows smoothly from a flat base (usually circular base) to a point(which forms an axis to the centre of base) called the apex or vertex. We can also define the cone as a pyramid which has a circular cross-section, unlike pyramid which has a triangular cross-section. These cones are also stated as a circular cone.
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Yogita Ingle 6 years ago
Chain pump: A chain pump consists of two large wheels, connected by an endless chain. The bottom wheel is half immersed in the water source. As the wheel is turned, the connected buckets dip into the pool and pick up water. The chain then lifts them to the upper wheel, where the water from the buckets is transferred to the pool. The chain then carries the empty buckets back down to be refilled and the process continues.
Moat or pulley-system: It is a manual irrigation method. By this method water is directly taken out of wells with the help of pulley and is used to irrigate fields.
Rahat: In this method water is drawn out of wells by animals. Animals like cow, buffalo, oxen etc. are connected to wheel. Animals move and rotate the wheel lead to draw the water from the well.
Dhekli: In this system a rope and bucket connected to pole to obtain water from well. They connect rope and bucket on one end of a heavy stick and a heavy counter weight at the other end.
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Chromatin is the loose dense network of uncoiled chromosomes present in the nucleus of the cell. This is clearly visible in the interphase during cell division. It contains DNA, RNA and proteins. The proteins which are associated with DNA can be histone proteins and non-histone proteins. During cell division chromatin condenses and forms coils which are densely packed to form rod like structures called as chromosomes.
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Diya Jayesh 6 years, 1 month ago
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