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The five factors that determine the weather of any land area are: the amount of solar energy received because of latitude; the area's elevation or proximity to mountains; nearness to large bodies of water or distance from the sea and relative temperatures of land and water.
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Yogita Ingle 7 years, 4 months ago
Sound is a form of energy that travels in the form of vibrations through the air or any another medium. Human beings are capable of producing sound which originates from the larynx or the voice box in the neck. The sound produced is controlled by thin membranous structures known as vocal cords that stretch across the larynx.
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Meghna Thapar 5 years, 10 months ago
Brownian motion is the random motion of particles suspended in a fluid (a liquid or a gas) resulting from their collision with the fast-moving molecules in the fluid.
This pattern of motion typically alternates random fluctuations in a particle's position inside a fluid sub-domain with a relocation to another sub-domain.
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Yogita Ingle 7 years, 4 months ago
Threshing is done by beating the sheaves against wooden bars. The grains are separated from the stalks. Threshing is done in the rice fields to minimize the cost of transportation.
Winnowing, on the other hand, is the process of removing the unwanted husk from the grains. This method involves pouring the grains from a height on a windy day. When the grains fall to the ground, the chaff is separated and blown aside.
Posted by Soumil Agarwal 7 years, 4 months ago
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Yogita Ingle 7 years, 4 months ago
| Parasite | Saprotroph |
| The organism that grows on the body of another organism and derives nutrients from it is known as a parasite. | The organism that obtains nutrients from the dead or decaying organic matter is called saprotroph. |
| They take the readymade food from the host. | They take the digested and decayed food. |
| They directly feed on living organisms for their nutrition. | They feed on dead and decaying organism. |
| Examples- Cuscuta and orchids. | Examples- Fungi and some bacteria. |
Posted by Nishitha Nishi 7 years, 4 months ago
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Yogita Ingle 7 years, 4 months ago
A cyclone has high speed winds followed by low pressure air region blowing.
Thus during a cyclone, the high speed winds over the roof tops, nothing much happens. But when the low pressure region comes above the loose roof top, due to pressure difference between inside and outside the roof, the roof top is blown away in air.
Tie two blown balloons to a rod so that there is some gap of 20 cm between the inner surfaces of the balloons. Now place your mouth in the center of the balloons and blow air between them. Initially the balloons go up horizontally in air and get separated a little more. But when you stop blowing, the region develops low pressure, as compared to the air on the other side of balloons. So the balloons come closer to about 10 cm or 15 cm.
Posted by Syeda Roshni 7 years, 4 months ago
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Yogita Ingle 7 years, 4 months ago
Weaving: The process of arranging two sets of yarn together to make a fabric is called weaving. The big reels of yarn are called bobbins. These bobbins are used for weaving the cloth. Cloth is woven on looms. After that they bleached and dyed to give a finish.
Posted by Ashit Naik 7 years, 4 months ago
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Yogita Ingle 7 years, 4 months ago
The bodies that reflect the light are used as the reflectors of light. Mirrors are the reflectors of light.
Teh objects which absorb the light are called absorbers of light. Dark coloured objects are the absorbers.
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Yogita Ingle 7 years, 4 months ago
Animals, which belong to amphibia, reptilian, aves and mammalia, use the lungs for breathing. Amphibians breathe through their skin, when they are in water. Smaller animals have different organs for breathing.
Breathing in fish: Fish have a pair of gills. The breathe air; dissolved in water; through gills.
Breathing in cockroach: Cockroach and other insects breathe through spiracles and tracheae. There is a network of hollow tubes running through the body of an insect. These hollow tubes are called trachea. Each trachea opens on the body surface in the form of very small pore. These pores are called spiracles.
Breathing in earthworm: Earthworms breathe through their skin. The skin of earthworm always remains moist, which helps in breathing.
Breathing in Unicellular Animals: Unicellular animals breathe through the cell membrane.
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Yogita Ingle 7 years, 4 months ago
Clinical Thermometer: Clinical thermometer is used to measure the body temperature. The scale of temperature is graduated from 35°C to 42°C and or from 94°F to 108°F. The temperature of human body always remains within this range and this is the range on the clinical thermometer. There is a kink near the bulb of clinical thermometer which prevents the automatic fall of mercury level.
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Yogita Ingle 7 years, 3 months ago
Displacement reaction:The reaction in which one element displaces another element from its compound is known as displacement reaction. In these reactions, more reactive element displaces less reactive element from its compound.
Example- 2AgNO3 (aq) +Cu → Cu (NO3)2 (aq) + 2Ag (S)
In the above reaction, Silver is replaced by copper because copper is more reactive than silver.
Double displacement reaction: The reaction in which two different atoms or group of atoms (ions) are displaced by other atoms or group of atoms (ions) is known as double displacement reaction.
Example - Na2SO4(aq) + BaCl2 (aq) → BaSO4(s) + 2NaCl(aq)
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