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Yogita Ingle 7 years, 11 months ago
Electric Cell: Electric cell is a device which produces electric current because of chemical reaction. Electric cells can be of dry type or wet type. The car battery is made up of wet cells. The cells in a torch are dry cells. An electric cell provides electricity to various devices that are not directly fed by the supply of electricity.
Posted by Sarita Gupta 7 years, 11 months ago
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Yogita Ingle 7 years, 11 months ago
Electric Cell: Electric cell is a device which produces electric current because of chemical reaction. Electric cells can be of dry type or wet type. The car battery is made up of wet cells. The cells in a torch are dry cells. An electric cell provides electricity to various devices that are not directly fed by the supply of electricity.
Posted by Siddharth Shankar 7 years, 11 months ago
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Yogita Ingle 7 years, 11 months ago
Animals need food to survive. There are 4 classification of animals according to what they it. These are the following:
1. Herbivores- Animals that only eat plant. A herbivore is an animal that gets its energy from eating plants, and only plants. Many herbivores have special digestive systems that let them digest all kinds of plants, including grasses. Example: Cow
2. Carnivores - Animals eat only other animals. A carnivore that sits at the top of the foodchain is an apex predator. Example: Tiger
3. Omnivores- Animals that eat both plants and animals. Omnivores eat plants, but not all kinds of plants. Unlike herbivores, omnivores can’t digest some of the substances in grains or other plants that do not produce fruit. They can eat fruits and vegetables, though. Some of the insect omnivores in this simulation are pollinators, which are very important to the life cycle of some kinds of plants. Example: Monkey
4. Detrivores or Scavengers- Animals that eat the remains of died animal. Example: Vulture
Posted by Siddharth Shankar 7 years, 11 months ago
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Arundhuti Mitra 7 years, 11 months ago
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Yogita Ingle 7 years, 11 months ago
Fabrics are made up of strands called yarns, which are made from even thinner strands, called fibres.
Fibres can be classified as natural fibres and synthetic fibres.
Natural fibres are obtained from natural sources, i.e. plants and animals. Example: Cotton, jute, silk, wool, etc.
Synthetic fibres are man-made fibres and are not obtained from any plant and animal sources. Example: Nylon, Polyester and Acrylic.
Posted by Bagyalakshmi Koventhan 7 years, 11 months ago
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Yogita Ingle 7 years, 11 months ago
Many items can be recycled several times to make new items. Glass, newspaper, aluminium and some kinds of plastic can be recycled.
Advantages of Recycling:
(i) Recycling minimizes pollution
(ii) Protects the environment
(iii) Recycling minimizes global warming
(iv) Conserves natural resources
(v) Recycling cuts down amount of waste in landfill sites
(vi) Recycling ensures sustainable use of resources
(vii) Reduces energy consumption
Posted by Venkat Rathnam 7 years, 11 months ago
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Yogita Ingle 7 years, 10 months ago
A change in the position of any object is called movement. Many movements take place in our body and also in other organisms’ body.
Examples of Movements in the Human Body:
- Movement of eyelids
- Movement of the heart muscles
- Movement of teeth and jaw.
- Movement of arms and legs.
- Movements of head.
- Movements of neck.
Movement of some organs happens because of the teamwork of bones and muscles. In such cases, movement is possible along a point where two or more bones meet.
Posted by Sonal Kumari 7 years, 11 months ago
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Yogita Ingle 7 years, 11 months ago
The water footprint measures the amount of water used to produce each of the goods and services we use. It can be measured for a single process, such as growing rice, for a product, such as a pair of jeans, for the fuel we put in our car, or for an entire multi-national company. The water footprint can also tell us how much water is being consumed by a particular country – or globally – in a specific river basin or from an aquifer.
Posted by Namrata Bellary 7 years, 11 months ago
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Yogita Ingle 7 years, 11 months ago
Global warming is a term used to describe the increase in average global temperatures due to the greenhouse effect.
Scientists generally agree that the Earth's surface has warmed by about one degree Fahrenheit in the past 140 years. That might not sound like much, but it has definitely impacted the earth. Scientists also think the rate at which the earth is heating up is increasing. The greenhouse effect is what scientists believe is causing the sharp increase in global temperatures. The earth's atmosphere traps solar radiation, caused by the presence of gases such as carbon dioxide, water vapor, and methane (from pollution) in the atmosphere, which allows incoming sunlight to pass through it but won't allow the heat to escape back out (like in a greenhouse).
Climate change can negatively affect the earth's delicate ecosystems. Global warming has been linked to dying coral reefs, dangerous new weather patterns and the extinction of plant and animal species.
Posted by Arpit Raj 7 years, 11 months ago
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Yogita Ingle 7 years, 11 months ago
Handpicking: The process used to separate slightly larger particles from a mixture by hand is called handpicking. It is the simplest method of separation of substances. This method is used only when unwanted material is in small quantity. Moreover, shape, size, or colour of the unwanted material is different from that of the useful materials. For example; pebbles, broken grains and insects are separated from rice, wheat and pulses; by handpicking.
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Anushka Jha Mithi 7 years, 11 months ago
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