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Yogita Ingle 7 years, 3 months ago
Fast moving air towards a centre; usually with heavy rain; is known as cyclone. Wind direction, wind speed, humidity and temperature together create cyclone.
When water vapour in the clouds cools down it releases heat. This heat warms the air around the clouds. The warm air rises up and creates a low pressure zone. This low pressure zone is quickly filled in by cooler air from the surrounding. This creates a system in which the centre is having very low pressure and is surrounded by wind moving around it. The wind from the surroundings moves in a circular fashion towards the centre and gives rise to cyclone.
The centre of the cyclone is called ‘eye’. A cyclone may be 10 to 15 km high. It is a rotating mass of air. The diameter of eye may be vary from 10 to 30 km. Eye of a cyclone is a calm area, but around the eye air may move with high speed such as 150 to 250 km/h.
Posted by Manjot Singh 7 years, 4 months ago
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Meghna Thapar 5 years, 6 months ago
Paperboard, which is used to make products such as cereal and cracker boxes, can be made from recycled paper. Cardboard can be manufactured from 100 percent recycled paper as well. Recycling paper is a great change as it decreases the cutting of trees thus the less trees cut the more oxygen produced . It will also increase aforestation . There are three categories of paper that can be used as feedstocks for making recycled paper: mill broke, pre-consumer waste, and post-consumer waste.
Posted by Khushpreet Kaur 7 years, 4 months ago
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Yogita Ingle 7 years, 3 months ago
Vaccines contain dead or weakened microbes of a particular disease. When a vaccine is introduced into a healthy body, the body fights and kills them by producing suitable antibodies. These antibodies remain in the body and protect it when the microbe enters the body again.
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Meghna Thapar 5 years, 6 months ago
Uses of metals:
- Gold, Platinum and silver are used as jewelleries and ornaments.
- Iron and steel are used for construction purpose.
- Aluminium, steel are used as utensils.
- Mercury is used in thermometer and helps to check the temperature.
- Aluminium are used as insulation wires.
Uses of non-metals:
Shiny metals such as copper, silver, and gold are often used for decorative arts, jewelry, and coins. Strong metals such as iron and metal alloys such as stainless steel are used to build structures, ships, and vehicles including cars, trains, and trucks. Some metals have specific qualities that dictate their use.
Posted by Krish Shah 7 years, 4 months ago
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Sara Arya 7 years, 4 months ago
2Thank You