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    • Posted by Pavithra Kumaran 7 years, 4 months ago

    CBSE > Class 08 > Science
    • 1 answers

    Mohd Anas 7 years, 4 months ago

    Sound produces by vibrations

    1Thank You

    ANSWER

    • Posted by Vishu Hans 7 years, 4 months ago

    CBSE > Class 08 > Science
    • 1 answers

    Harsh Roy 7 years, 4 months ago

    Because plastic is an non reactive materrial and it doesn't react with air therefore rust is not formed on the plastic bucket

    4Thank You

    ANSWER

    • Posted by Den Cariappa 7 years, 4 months ago

    CBSE > Class 08 > Science
    • 1 answers

    Shweta Chaudhary 7 years, 4 months ago

    Boiling mean to heat but continue heating till it tra scored.a into vapours whereas heating refer to heat a substance to a particular temperature

    4Thank You

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    • Posted by Vrinda Chhabra 7 years, 5 months ago

    CBSE > Class 08 > Science
    • 1 answers

    Meghna Thapar 5 years, 7 months ago

    Aluminium is the most abundant metal in the earth's crust. The second most abundant metal in the earth is iron and third one is calcium. The mass-abundance of the nine most abundant elements in the Earth's crust is approximately: oxygen 46%, silicon 28%, aluminum 8.3%, iron 5.6%, calcium 4.2%, sodium 2.5%, magnesium 2.4%, potassium 2.0%, and titanium 0.61%.

    0Thank You

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    • Posted by Sanika Nirmale 7 years, 5 months ago

    CBSE > Class 08 > Science
    • 3 answers

    Jahnavi Kumari 7 years, 4 months ago

    Terrace farming means growing of crops on level steps or terraces constucted on hills sides

    2Thank You

    Aryan Gupta 7 years, 4 months ago

    In agriculture, a terrace is a piece of sloped plane that has been cut into a series of successively receding flat surfaces or platforms, which resemble steps, for the purposes of more effective farming.

    2Thank You

    Harshvardhan Singh 5 years, 9 months ago

    Broad flat steps or terraces are made on the steep slopes so that flat surfaces are available to grow crops

    2Thank You

    ANSWER

    • Posted by Rakesh Kumar 7 years, 5 months ago

    CBSE > Class 08 > Science
    • 2 answers

    Rakesh Kumar 7 years, 4 months ago

    But if temperature increase in the atmosphere it increase the evaporation of the water then how it disturb the water cycle . Remember thet the amount of water is limited on the earth , it will neither increase nor decrease .

    1Thank You

    Harsh Roy 7 years, 4 months ago

    Water cycle is distributed because when we pollute our nature it results in global warming and therefore, due to high temp and deforestation rain is reduced this disturbs the whole water cycle

    2Thank You

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    • Posted by Vishal Nath 7 years, 5 months ago

    CBSE > Class 08 > Science
    • 1 answers

    Vrinda Chhabra 7 years, 5 months ago

    1. It causes soil erosion and makes the soil infertile. 2. Deforestation increases the level of carbon dioxide in atmosphere. 3. It decreases the water holding capacity of the soil and can cause floods. 4. cutting down trees destroy the homes of animals which results in a threat to their survival.

    4Thank You

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    • Posted by Aditya Jain 7 years, 5 months ago

    CBSE > Class 08 > Science
    • 1 answers

    Yogita Ingle 7 years, 5 months 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.

    4Thank You

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    • Posted by Aswin Manu 7 years, 5 months ago

    CBSE > Class 08 > Science
    • 1 answers

    Jayesh Chaudhari 7 years, 4 months ago

    Nitrogen Cycle This picture shows the flow of the nitrogen cycle. The most important part of the cycle is bacteria. Bacteria help the nitrogen change between states so it can be used. When nitrogen is absorbed by the soil, different bacteria help it to change states so it can be absorbed by plants. Animals then get their nitrogen from the plants. Diagram of the nitrogen cycle Processes in the Nitrogen Cycle Fixation - Fixation is the first step in the process of making nitrogen usable by plants. Here bacteria change nitrogen into ammonium. Nitrification - This is the process by which ammonium gets changed into nitrates by bacteria. Nitrates are what the plants can then absorb. Assimilation - This is how plants get nitrogen. They absorb nitrates from the soil into their roots. Then the nitrogen gets used in amino acids, nucleic acids, and chlorophyll. Ammonification - This is part of the decaying process. When a plant or animal dies, decomposers like fungi and bacteria turn the nitrogen back into ammonium so it can reenter the nitrogen cycle. Denitrification - Extra nitrogen in the soil gets put back out into the air. There are special bacteria that perform this task as well.

    0Thank You

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    • Posted by Mobassir Raza Mobassir 7 years, 5 months ago

    CBSE > Class 08 > Science
    • 0 answers
    ANSWER

    • Posted by Rishkirat Singh Talwar 7 years, 5 months ago

    CBSE > Class 08 > Science
    • 1 answers

    Harsh Roy 7 years, 5 months ago

    We give polio drops to children to protect them from a disease called Polio and to make their imune system strong and protect from diseases

    1Thank You

    ANSWER

    • Posted by Hiten Kohli 7 years, 5 months ago

    CBSE > Class 08 > Science
    • 3 answers

    Deepu Rajput 7 years, 4 months ago

    I think Rana should buy a cotton because shirt made up of synthetic material by any chance catches fire then it sticks to our body which is dangerous for us.

    1Thank You

    Nishu Singh 7 years, 5 months ago

    Rana should buy cotton shirt because in summer reason it aborbs sweat easily so it is comfortable while in synthetic shirts it cannot aborbs sweat so it is good for rana to buy cotton shirt.....

    6Thank You

    Manjit Singh 7 years, 5 months ago

    Rana should buy cotton shirt because it is most breathable and synthetic shirt trap heat so that it is not good for summer

    3Thank You

    ANSWER

    • Posted by Mohit Dhayal 7 years, 5 months ago

    CBSE > Class 08 > Science
    • 1 answers

    Isha Bhardwaj 7 years, 5 months ago

    The membrane of amoeba which have not fixed shape is called pseudopodia ( false feet)

    1Thank You

    ANSWER

    • Posted by Yash Kumar 7 years, 5 months ago

    CBSE > Class 08 > Science
    • 1 answers

    Mohit Dhayal 7 years, 5 months ago

    Kg

    2Thank You

    ANSWER

    • Posted by Isha Joshi 7 years, 5 months ago

    CBSE > Class 08 > Science
    • 1 answers

    Meghna Thapar 5 years, 7 months ago

    Plant breeding is the science of changing the traits of plants in order to produce desired characteristics. It has been used to improve the quality of nutrition in products for humans and animals. Plant breeding, application of genetic principles to produce plants that are more useful to humans. This is accomplished by selecting plants found to be economically or aesthetically desirable, first by controlling the mating of selected individuals, and then by selecting certain individuals among the progeny.

    0Thank You

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    • Posted by Neeraj Sharma 7 years, 5 months ago

    CBSE > Class 08 > Science
    • 1 answers

    Sruti Banarjee 7 years, 5 months ago

    Ferrous means four molecules of iron.I guess it

    0Thank You

    ANSWER

    • Posted by Ayush Asmit Pradhan 7 years, 5 months ago

    CBSE > Class 08 > Science
    • 1 answers

    Varnit Mehra 7 years, 5 months ago

    Because it work like biogas

    5Thank You

    ANSWER

    • Posted by Sarwar Ahamad 7 years, 5 months ago

    CBSE > Class 08 > Science
    • 0 answers
    ANSWER

    • Posted by Aayush Meel 7 years, 5 months ago

    CBSE > Class 08 > Science
    • 1 answers

    Gaurav Puruohit 7 years, 5 months ago

    When iron nails are placed in copper sulphate solution the blue colour of copper sulphate fades and turns into light green. This happens because the iron dispaces copper from its salt solution

    3Thank You

    ANSWER

    • Posted by Imran Khan 7 years, 5 months ago

    CBSE > Class 08 > Science
    • 1 answers

    Imran Khan 7 years, 5 months ago

    In the presence of moisture and air (O²) rust get deposit over iron

    4Thank You

    ANSWER

    • Posted by Acku Acku 7 years, 5 months ago

    CBSE > Class 08 > Science
    • 1 answers

    Ayush Asmit Pradhan 7 years, 5 months ago

    Recover is to convert waste into resources (such as electricity,heat,compost and fuel) through thermal and biological means

    3Thank You

    ANSWER

    • Posted by Soumya Pandey 7 years, 5 months ago

    CBSE > Class 08 > Science
    • 1 answers

    Sp Chouhan 7 years, 5 months ago

    The full form of RNA is RIBONUCLEIC Acid

    2Thank You

    ANSWER

    • Posted by Soumya Pandey 7 years, 5 months ago

    CBSE > Class 08 > Science
    • 2 answers

    Soumya Pandey 7 years, 1 month ago

    Thanks

    0Thank You

    Sruti Banarjee 7 years, 5 months ago

    Osteocytes cells

    2Thank You

    ANSWER

    • Posted by Maninder Gill 7 years, 5 months ago

    CBSE > Class 08 > Science
    • 1 answers

    Aayush Meel 7 years, 5 months ago

    Fibres means a woven material taxtile or other material resembling woven cloth.

    3Thank You

    ANSWER

    • Posted by Bhaskar Richa 7 years, 5 months ago

    CBSE > Class 08 > Science
    • 1 answers

    Meghna Thapar 5 years, 7 months ago

    When an object moves backwards and forwards rapidly, we say an object is vibrating and produces sound. The energy required to make an object vibrate and produce sound is provided by some outside source. 

    Some animals can hear sounds of frequencies higher than 20,000 Hz like dogs. The police use high frequency whistles which dogs can hear but humans cannot.

    Bat produces ultrasonic sound during screaming so we cannot hear its sound.

    0Thank You

    ANSWER

    • Posted by Shailee Soni 7 years, 5 months ago

    CBSE > Class 08 > Science
    • 1 answers

    Ayush Agrawal 7 years, 5 months ago

    Answer is too long

    2Thank You

    ANSWER

    • Posted by Nanu Rajput 7 years, 5 months ago

    CBSE > Class 08 > Science
    • 0 answers
    ANSWER

    • Posted by Nanu Rajput 7 years, 5 months ago

    CBSE > Class 08 > Science
    • 2 answers

    Riddhima Rewaria 7 years, 5 months ago

    Comperessed natural gas

    4Thank You

    Soumya Pandey 7 years, 5 months ago

    Compressed natural gas

    4Thank You

    ANSWER

    • Posted by D Anusha 7 years, 5 months ago

    CBSE > Class 08 > Science
    • 1 answers

    Sreemayi Ronanki 7 years, 5 months ago

    In this process the sugar is converted into alcohol by yeast this process is invented by Louis Pasteur

    2Thank You

    ANSWER

    • Posted by D Anusha 7 years, 5 months ago

    CBSE > Class 08 > Science
    • 1 answers

    Nandana S 7 years, 5 months ago

    Alcohol is prepared by the process of fermentation. Yeast respires anaerobically. So when yeast is added to sugar solution due to its anaeorobic respiration which produces carbondioxide which ferments the sugar solution.

    4Thank You

    ANSWER

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