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    • Posted by Sandeep Bandi 7 years, 6 months ago

    CBSE > Class 08 > Science
    • 1 answers

    Sonali Aggarwal 7 years, 6 months ago

    Frictional Force refers to the force generated by two surfaces that contacts and slide against each other. These forces are mainly affected by the surface texture and amount of force impelling them together. The angle and position of the object affect the amount of frictional force.

    3Thank You

    ANSWER

    • Posted by Shilpi Gupta 7 years, 6 months ago

    CBSE > Class 08 > Science
    • 0 answers
    ANSWER

    • Posted by Suraj Bhatt 7 years, 6 months ago

    CBSE > Class 08 > Science
    • 0 answers
    ANSWER

    • Posted by Shashank Sharma R 7 years, 6 months ago

    CBSE > Class 08 > Science
    • 2 answers

    Vansh Sharma 7 years, 6 months ago

    When animal or plants are die and then it is composed by scavenger of waste is called humus

    0Thank You

    Shyam K.R 7 years, 6 months ago

    Dead matters of animals and plants are called humus.

    3Thank You

    ANSWER

    • Posted by Shashank Sharma R 7 years, 6 months ago

    CBSE > Class 08 > Science
    • 2 answers

    Vansh Sharma 7 years, 6 months ago

    Wood pulp is chaal of tree

    1Thank You

    Shyam K.R 7 years, 6 months ago

    Wood pulp is a wood that has been cut up into small pieces and crashed.It also used to make paper.

    1Thank You

    ANSWER

    • Posted by Sangmesh Malayyanavar 7 years, 6 months ago

    CBSE > Class 08 > Science
    • 1 answers

    Aditya Raj 7 years, 6 months ago

    Microorganisns have many hamful effects which can harm both plant and animals.All the diseases of human beings, animals and plants microorganisms are involved. Microorganisms which cause disease are known as pathogens. Microorganisns are also involved in the damage of food items.

    2Thank You

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    • Posted by Sahil Saini 7 years, 6 months ago

    CBSE > Class 08 > Science
    • 1 answers

    Rounak Gaur 7 years, 6 months ago

    Acid+metal=hydrogen

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    ANSWER

    • Posted by Ankit Ku.Ar 7 years, 6 months ago

    CBSE > Class 08 > Science
    • 1 answers

    Sonali Aggarwal 7 years, 6 months ago

    Polywool is a blended fibre formed by mixing fibres called polyester and wool. 

    1Thank You

    ANSWER

    • Posted by Faizan Mehrab 7 years, 6 months ago

    CBSE > Class 08 > Science
    • 3 answers

    Vaishnavi Manwal 7 years, 6 months ago

    Ester have fruit smell

    0Thank You

    Sonali Aggarwal 7 years, 6 months ago

    Polyester is a synthetic fibre.Polyester (poly+ester)is made up of the repeating unitsof a chemical called an ester.The chemical compounds used in making polyester fibres are made from petroleum products called petrochemicals.

    1Thank You

    Yogita Ingle 7 years, 6 months ago

    Polymers are substances containing a large number of structural units joined by the same type of linkage. These substances often form into a chain-like structure. Today, the polymer industry has grown to be larger than the aluminum, copper and steel industries combined. Polymers already have a range of applications that far exceeds that of any other class of material available to man. Current applications extend from adhesives, coatings, foams, and packaging materials to textile and industrial fibers, composites, electronic devices, biomedical devices, optical devices, and precursors for many newly developed high-tech ceramics.

    1Thank You

    ANSWER

    • Posted by Aditya Raj 7 years, 6 months ago

    CBSE > Class 08 > Science
    • 2 answers

    Sonali Aggarwal 7 years, 6 months ago

     The act or process of mating organisms of different varieties or species to create a hybrid.Hybrid variety seeds are used to increase the quality of the produce.

    1Thank You

    Yogita Ingle 7 years, 6 months ago

    Hybridization is the crossing of dissimilar individuals to  produce best of both organisms. One advantage of hybridization is that  it can combine disease resistance of one organism with the production  capacity of another. Crop yields increase dramatically when hybridization is used to exceed one or more of the parents in size and reproductive potential.

    1Thank You

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    • Posted by Salmman Hussain 7 years, 6 months ago

    CBSE > Class 08 > Science
    • 4 answers

    Vaishnavi Manwal 7 years, 6 months ago

    In this system water falls drop by drop at regular intervals that is called drip irrigation.

    0Thank You

    Harshita Singh 7 years, 6 months ago

    In drip system water is delivered at or near the roots of the plant drop by drop is called drip system

    0Thank You

    Sonali Aggarwal 7 years, 6 months ago

    In drip irrigation system there is a network of narrow pipes with small holes , in the fields . When water flows through the narrow pipes , it falls drop by drop at  the position of roots of the plants. 

    1Thank You

    Vedansh Jaiswal 7 years, 6 months ago

    Drip irrigation means a type of micro irrigation system which allow water to drip slowly in the roots of plants and has potential to save water

    1Thank You

    ANSWER

    • Posted by Faizan Rangrez 7 years, 6 months ago

    CBSE > Class 08 > Science
    • 1 answers

    Yogita Ingle 7 years, 6 months ago

    Coal and petroleum were formed from dead remains of plants and animals which got buried millions of years ago. Due to this, coal and petroleum are called fossil fuels. Fossil fuels are the buried organism under high temperature and pressure in earth crust deeply in the form of fuel. Fossil fuels were created by decomposing organic (plant and animal) matter a long, long time ago and are typically found underground. Different temperatures and pressures resulted in the organic matter transforming into coal, oil or gas. For example petroleum, coal, etc.

    0Thank You

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    • Posted by Usha Atram 7 years, 6 months ago

    CBSE > Class 08 > Science
    • 2 answers

    Vansh Sharma 7 years, 6 months ago

    Sprinkler system and drip system

    0Thank You

    Sitanshu Patel 7 years, 6 months ago

    Jay

    0Thank You

    ANSWER

    • Posted by Zahra Limdiwala 7 years, 6 months ago

    CBSE > Class 08 > Science
    • 2 answers

    Shyam K.R 7 years, 6 months ago

    State of motion of an object is defined as Velocity. Velocity is defined as speed which an object moves. Everything with moves in succeptible to the classical newtonian laws of motion. Example:Ball rolling down a hill.

    0Thank You

    Shirin Fathima 7 years, 6 months ago

    A change either the speed or direction of an object is called state of motion

    1Thank You

    ANSWER

    • Posted by A.Thameem Ansari 7 years, 6 months ago

    CBSE > Class 08 > Science
    • 1 answers

    S S 7 years, 6 months ago

    FLOWERING PLANTS(PHYLUM ANGIOSPERMPHYTA) are divided into two classes: monocotyledons and dicotyledons. Monocotyledons have seeds with one cotyledons ; their foliage leaves are narrow with parrallel veins;

    0Thank You

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    • Posted by Sahil Saini 7 years, 6 months ago

    CBSE > Class 08 > Science
    • 2 answers

    Sahil Saini 4 years, 9 months ago

    Co2

    0Thank You

    Garisha Kansal 7 years, 6 months ago

    This is ques of class 7

    4Thank You

    ANSWER

    • Posted by Anurag Tiwari 7 years, 6 months ago

    CBSE > Class 08 > Science
    • 2 answers

    Sonali Aggarwal 7 years, 6 months ago

    Converting of water into water vapour is called evapouration.

    0Thank You

    Sahil Saini 7 years, 6 months ago

    Evaporation

    1Thank You

    ANSWER

    • Posted by Mohan Soren 7 years, 6 months ago

    CBSE > Class 08 > Science
    • 1 answers

    Madhushree Roy 7 years, 6 months ago

    Resources in nature which are limited and can be exhausted by human activities are called exhaustible renewable resources. For example- fossil fuels like coal and petroleum.

    0Thank You

    ANSWER

    • Posted by Bhanupratap Baradiya 7 years, 6 months ago

    CBSE > Class 08 > Science
    • 1 answers

    Yogita Ingle 7 years, 6 months ago

    Manufacturing synthetic fibres is actually helping conservation of forests because raw material for natural fibers are mainly derived from plants and this means cutting a lots of trees. This leads to deforestation. But raw material of synthetic material are mainly petrochemicals.Therefore it does not require cutting plants to get the natural fibres.

    1Thank You

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    • Posted by Aditi Vasdev 7 years, 6 months ago

    CBSE > Class 08 > Science
    • 4 answers

    Harshita Singh 7 years, 6 months ago

    Metals are good conductors of heat

    0Thank You

    Tanuja Gogoi 7 years, 6 months ago

    Materials which generally possess the property of malleability, ductility, good conductor of heat and electricity, lustre, hard etc are called metals. ?

    0Thank You

    Salmman Hussain 7 years, 6 months ago

    Non metal are bad conductor of heat and elecricity

    2Thank You

    Salmman Hussain 7 years, 6 months ago

    Mate are good conductor of heat and electricity. eg Iron Nickel and Silver

    1Thank You

    ANSWER

    • Posted by Daliya Neha 7 years, 6 months ago

    CBSE > Class 08 > Science
    • 0 answers
    ANSWER

    • Posted by Tanvi Shirodkar 7 years, 6 months ago

    CBSE > Class 08 > Science
    • 3 answers

    Harshita Singh 7 years, 6 months ago

    To remove fertility of soil

    0Thank You

    Nishant Shukla 7 years, 6 months ago

    For the proper penetration of seeds into soil

    0Thank You

    Ashwini Shendage 7 years, 6 months ago

    For ploughing

    3Thank You

    ANSWER

    • Posted by Omkar Gunnapur 7 years, 6 months ago

    CBSE > Class 08 > Science
    • 2 answers

    Harshita Singh 7 years, 6 months ago

    Micro organisms cannot seen with naked eye ? is called micro organisms

    0Thank You

    Yogita Ingle 7 years, 6 months ago

    An organism which cannot be seen by naked eyes is called microorganism or microbe. We need a microscope to see a microbe.

    Types of Microorganism

    • Bacteria: Bacteria are microscopic organisms which have cell walls but do not have nucleus. Some bacteria are autotrophs but most are heterotrophs. Bacteria are found in different shapes; like rod-shaped, spiral, spherical and comma-shaped. Examples: Rhizobium, E. coli, Pseudomonas, Streptococcus, etc.
    • Algae: Algae are green plants which are simple in structure. A cell of algae contains cell wall and chloroplast. Algae are autotrophs. Some algae are microscopic. Examples: Chlamydomonas, Spirogyra, etc.
    • Fungi: Fungi have cell wall and nucleus in their cells but do not have chloroplast. Fungi are saprotrophs, i.e. they feed on dead remains of plants and animals. Almost all fungi are microscopic, except mushrooms. Examples: yeast, Rhizopus (bread mould), Aspergillus, Penicillium, etc.
    • Protozoa: Protozoa do not have cell wall and chloroplast but they do have nucleus. Amoeba and Plasmodium are examples of protozoa.

    0Thank You

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    • Posted by Pancham Asodiya 7 years, 6 months ago

    CBSE > Class 08 > Science
    • 1 answers

    Yogita Ingle 7 years, 6 months ago

    Manure Fertilizer
    Manure is a natural or an organic substance obtained by the decomposition of plant and animal wastes. This is done by microbes, earthworms, fungus etc. Fertilizer is a synthetic substance or an inorganic compound.
    Low percentage of nutrients is present. High percentage of nutrients is present.
    Manure provides a lot of organic matter to the soil. It is slowly absorbed by the plants. Fertilizer does not provide any humus to the soil. It is quickly absorbed by the plants.
    Crop productivity is increased only to some certain extent. Crop productivity is increased many folds by its use.
    No side effects of manure are absorbed. Chemicals in fertilisers are washed away to the nearby water bodies, causing soil and water pollution.

    1Thank You

    ANSWER

    • Posted by Pancham Asodiya 7 years, 6 months ago

    CBSE > Class 08 > Science
    • 1 answers

    Yogita Ingle 7 years, 6 months ago

    Preparation of Soil : The first step of cultivation is preparation of soil. This is done by loosening and turning the soil. A plough is used for this purpose. If the soil becomes too hard then farmer may resort to watering the soil before ploughing. Traditionally, animal-drawn ploughs have been used by farmers. Now-a-days, tractor-drawn ploughs are used for this purpose. A tractor helps in saving time and labour. The soil may contain many big lumps even after ploughing. The lumps are broken with the help of a hoe. Sometimes the farmer may add manure before ploughing; in order to properly mix the manure with soil.

    0Thank You

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    • Posted by Kaya Mishra 7 years, 6 months ago

    CBSE > Class 08 > Science
    • 1 answers

    Yogita Ingle 7 years, 6 months ago

    Balancing the need to use resources and also conserve them for the future is called sustainable development. In simpler words, it means carefully utilization of resources so that not only it meets the present requirements but also takes care of the need of future generations.

    0Thank You

    ANSWER

    • Posted by Jash Koradia 7 years, 6 months ago

    CBSE > Class 08 > Science
    • 1 answers

    Arjun Saji 7 years, 6 months ago

    Cuhjcjjvgdg

    1Thank You

    ANSWER

    • Posted by Jash Koradia 7 years, 6 months ago

    CBSE > Class 08 > Science
    • 2 answers

    Nikhil Yadav 7 years, 6 months ago

    There is one more way by which farmers can protect crops from weeds . That is known as 'weedicides' . These are the chemical substance which are sprayed in the field to kill the weeds .

    3Thank You

    Simrat Kaur 7 years, 6 months ago

    By the tools used for weeding like khurpi

    1Thank You

    ANSWER

    • Posted by Jash Koradia 7 years, 6 months ago

    CBSE > Class 08 > Science
    • 0 answers
    ANSWER

    • Posted by Jash Koradia 7 years, 6 months ago

    CBSE > Class 08 > Science
    • 1 answers

    Nikhil Yadav 7 years, 6 months ago

    Ploughing is used for loosening the soil . Levelling is used to level the soil at a particular level / Height

    1Thank You

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