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    • Posted by Ziya Patel 1 year, 7 months ago

    CBSE > Class 08 > Science
    • 0 answers
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    • Posted by Baishakhi Chanda 1 year, 7 months ago

    CBSE > Class 08 > Science
    • 0 answers
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    • Posted by Shraddha Koppad 1 year, 7 months ago

    CBSE > Class 08 > Science
    • 0 answers
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    • Posted by Aarushi Gupta 1 year, 7 months ago

    CBSE > Class 08 > Science
    • 2 answers

    Jaidev Sadhwani 1 year, 7 months ago

    To maloom karke aao

    2Thank You

    Faijan Abid 1 year, 7 months ago

    What is ignition temperature

    0Thank You

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    • Posted by Aarushi Gupta 1 year, 7 months ago

    CBSE > Class 08 > Science
    • 0 answers
    ANSWER

    • Posted by Raghvi Dubey 1 year, 7 months ago

    CBSE > Class 08 > Science
    • 2 answers

    J. P Tiwari 1 year, 7 months ago

    Yes

    0Thank You

    Paramjit Dey 1 year, 7 months ago

    CBSE Class 08 Science Revision Notes Chapter – 18 Pollution of Air and Water Pollution: An undesirable change in the physical, chemical or biological characteristics of air, water and land that may be harmful to human life and other animals, living conditions, industrial processes and cultural assets. Pollutants: The agents that pollute our environment are called pollutants. Pollutants are the substances which contaminate air, water and land. For eg. smoke ,dust,fog and gases like sulphur dioxide and nitrogen dioxide. Air pollution is the contamination of air by impurities which may have a harmful impact on the living organisms and the non-living components. Sources of Air Pollution: Natural Sources: Smoke and dust arising from forest fires or volcanic eruptions. Methane gas arising from decaying organic matter. Man-made Sources: Exhaust gases from factories, power plants and automobiles. Carbon monoxide, nitrogen oxides, carbon dioxide, methane and sulphur dioxide are the major pollutants of air. Smog is a mix in the air of smoke and chemicals with fog. The chemical components of smog can include ozone, sulphur dioxide, nitrogen dioxide and carbon monoxide. Smog can trigger breathing difficulties like asthma and coughing. Steps to prevent air pollution: • Use of fuels like CNG and unleaded petrol in automobiles. • Switching to alternative fuels, like solar energy, hydropower and wind energy. • Planting trees. • Travelling to school on a bicycle or on public transport or car pooling. • Avoiding the burning of leaves, trash and vegetable matter. • Restricting cigarette smoking. Increasing levels of greenhouse gases like CO2 ,CFC (Chloroflorocarbon) are leading to global warming. Excessive use of CFCs damages ozone layer which protects the earth from harmful UV rays emitted by the sun. Greenhouse Effect and Global Warming: The sun's rays warm the earth's surface. A part of the radiation that falls on the earth is absorbed by it and a part is reflected back into space. A part of the reflected radiation is trapped by the atmosphere due to presence of gases like water vapor, carbon dioxide, methane, nitrous oxide etc known as greenhouse gases. This is known as greenhouse effect. The trapped radiations further warm the earth and have adverse effects such as melting of glaciers and increasing sea levels. This phenomenon is known as global warming. Water pollution is the contamination of water by objectionable and harmful substances such as sewage, toxic chemicals, silt, etc. Sewage, agricultural chemicals and industrial waste are some of the major contaminants of water. Water which is purified and fit for drinking is known as potable water. Water is a precious natural resource. We must learn to conserve it.

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    • Posted by Swati Dawar 1 year, 7 months ago

    CBSE > Class 08 > Science
    • 1 answers

    Alok Gupta Ix 1 year, 7 months ago

    The burning of a substance is called cumbtion

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    • Posted by Aditya Thakur 1 year, 7 months ago

    CBSE > Class 08 > Science
    • 1 answers

    Sonam Kumari 1 year, 7 months ago

    An example of epimorphosis invertebrates are: Regeneration of Limbs. Regeneration of Lenses. Regeneration of internal body organs.

    1Thank You

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    • Posted by Sampreethi Sampreethi 1 year, 7 months ago

    CBSE > Class 08 > Science
    • 2 answers

    Sonam Kumari 1 year, 7 months ago

    Menstruation is the regular discharge of blood and mucosal tissue from the inner lining of the uterus through the ******. The menstrual cycle is characterized by the rise and fall of hormones. Menstruation is triggered by falling progesterone levels and is a sign that pregnancy has not occurred.

    1Thank You

    Tanishka Nehul 1 year, 7 months ago

    If the fertilization does not occur the released egg and the thickened lining of the uterus along with its blood vessels are shade of this causes blooding in women which is called menstruation

    2Thank You

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    • Posted by Sejal Yadav 1 year, 8 months ago

    CBSE > Class 08 > Science
    • 3 answers

    Sonam Kumari 1 year, 7 months ago

    The most common method to control a Class-A fire is to remove heat by spraying the burning solid fuels with water. Another control method would be to reduce the oxygen content in the immediate vicinity of the fire (i.e., "smother" the fire), such as by the introduction of an inert gas such as carbon dioxide.

    0Thank You

    Tanishka Nehul 1 year, 7 months ago

    If the fire catches electric gadgets we have to use Fire extinguisher cylinder that have carbon dioxide

    0Thank You

    Anunandana S 1 year, 7 months ago

    Using water,fire extinguisher,sand

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    • Posted by Sejal Yadav 1 year, 8 months ago

    CBSE > Class 08 > Science
    • 1 answers

    Saumya Kshiti Raj Pal 1 year, 8 months ago

    We should avoid to spell water on the Fire we should call to the fire department and escape that place very carefully

    1Thank You

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    • Posted by Riya Shekhawat 1 year, 8 months ago

    CBSE > Class 08 > Science
    • 3 answers

    Sonam Kumari 1 year, 7 months ago

    Puberty is the time in life when a boy or girl becomes sexually mature. It is a process that usually happens between ages 10 and 14 for girls and ages 12 and 16 for boys. It causes physical changes, and affects boys and girls differently. In girls: The first sign of puberty is usually breast development.

    0Thank You

    Aryan Kumar 1 year, 8 months ago

    You can message me on Instagram

    1Thank You

    Aryan Kumar 1 year, 7 months ago

    This content has been hidden. One or more users have flagged this content as inappropriate. Once content is flagged, it is hidden from users and is reviewed by myCBSEguide team against our Community Guidelines. If content is found in violation, the user posting this content will be banned for 30 days from using Homework help section. Suspended users will receive error while adding question or answer. Question comments have also been disabled. Read community guidelines at https://mycbseguide.com/community-guidelines.html

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    • Posted by Riya Shekhawat 1 year, 8 months ago

    CBSE > Class 08 > Science
    • 2 answers

    Prabhu Datta Dilu 1 year, 8 months ago

    What is fertilisation

    0Thank You

    Archana Pandit 1 year, 7 months ago

    This content has been hidden. One or more users have flagged this content as inappropriate. Once content is flagged, it is hidden from users and is reviewed by myCBSEguide team against our Community Guidelines. If content is found in violation, the user posting this content will be banned for 30 days from using Homework help section. Suspended users will receive error while adding question or answer. Question comments have also been disabled. Read community guidelines at https://mycbseguide.com/community-guidelines.html

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    • Posted by Dhruv Seth 1 year, 8 months ago

    CBSE > Class 08 > Science
    • 2 answers

    Sonam Kumari 1 year, 7 months ago

    Have *** near the time of ovulation. If having *** every day isn't possible — or enjoyable — have *** every 2 to 3 days a week starting soon after the end of your period. This can help ensure that you have *** when you are most fertile. Maintain a normal weight.

    0Thank You

    Pariniti Panda 1 year, 7 months ago

    This content has been hidden. One or more users have flagged this content as inappropriate. Once content is flagged, it is hidden from users and is reviewed by myCBSEguide team against our Community Guidelines. If content is found in violation, the user posting this content will be banned for 30 days from using Homework help section. Suspended users will receive error while adding question or answer. Question comments have also been disabled. Read community guidelines at https://mycbseguide.com/community-guidelines.html

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    • Posted by Priyanshi Kumawat 1 year, 8 months ago

    CBSE > Class 08 > Science
    • 0 answers
    ANSWER

    • Posted by Samiksha Danane 1 year, 8 months ago

    CBSE > Class 08 > Science
    • 2 answers

    Sonam Kumari 1 year, 7 months ago

    the process of producing babies or young

    0Thank You

    Saumya Kshiti Raj Pal 1 year, 8 months ago

    Reproduction means producing a new ones among the existing or from the existing one

    1Thank You

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    • Posted by Mannat Dhull 1 year, 8 months ago

    CBSE > Class 08 > Science
    • 4 answers

    Aarushi Gupta 1 year, 7 months ago

    Agar hamen is sal ka chahie to fifth se lekar to eight Tak

    0Thank You

    Krunal Pachpohar 1 year, 8 months ago

    Sol. In this case, muscular force is acting in upward direction and the force of gravity is acting in downward direction. Both forces are acting in opposite directions to each other and hence nullify the effect of each other. Due to this, there is no change in the state of motion of the bucket.

    0Thank You

    Priyanshi Kumawat 1 year, 8 months ago

    This is the cause of motion

    0Thank You

    Prince_ 🤴_ Kumar 1 year, 8 months ago

    This content has been hidden. One or more users have flagged this content as inappropriate. Once content is flagged, it is hidden from users and is reviewed by myCBSEguide team against our Community Guidelines. If content is found in violation, the user posting this content will be banned for 30 days from using Homework help section. Suspended users will receive error while adding question or answer. Question comments have also been disabled. Read community guidelines at https://mycbseguide.com/community-guidelines.html

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    • Posted by Sharvari Gaware 1 year, 8 months ago

    CBSE > Class 08 > Science
    • 2 answers

    Sonam Kumari 1 year, 7 months ago

    Manure adds nutrients to the soil without affecting its fertility. It does not damage crops and produces healthy plants. Fertilizers are chemicals which lower the fertility of the soil if used regularly. They also damage the crops and make them unhealthy for consumption.

    0Thank You

    Aman Singh 1 year, 8 months ago

    Advantages of manure 1.improves the texture of soil 2.add humus to the soil 3.enhance the water holding capacity of the soil 4. It's not expensive and easily prepared from wastes in the farm ___________________________________ Advantages of fertilizer 1.improves soil fertility 2.plants absorb it easily 3.it can be easily transpoted in plants 4.it allows to grow crops faster But I think manure is more good for the soil

    0Thank You

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    • Posted by Liban Ahmad 1 year, 8 months ago

    CBSE > Class 08 > Science
    • 2 answers

    Aanandita Singh 1 year, 8 months ago

    Renewable - 1)They are biodegradable. 2)They can be renew again. 3)They are eco friendly. Non Renewable - 1)They are non- biodegradable. 2)They can't be renew again. 3)They are not eco friendly.

    0Thank You

    Naitik Dhanuk 1 year, 8 months ago

    Causes less pollution----causes more pollution

    1Thank You

    ANSWER

    • Posted by Aman Preet 1 year, 8 months ago

    CBSE > Class 08 > Science
    • 1 answers

    Chetan Kr Mallik 1 year, 8 months ago

    Muscular Force is a Type of force in which force exerted by the muscles of living organisms , It is called Contact Force because when in muscular Force the contect between object and muscle taking place than it is comes in the category of Contact Force.

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    • Posted by Meenal Patel 1 year, 8 months ago

    CBSE > Class 08 > Science
    • 2 answers

    Devesh 156789 1 year, 8 months ago

    Gh

    0Thank You

    Kunal Ambadas Guthe Guthe 1 year, 8 months ago

    What is Pitcairn gland

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    • Posted by Arun Dharshan 1 year, 8 months ago

    CBSE > Class 08 > Science
    • 2 answers

    Devesh 156789 1 year, 8 months ago

    This content has been hidden. One or more users have flagged this content as inappropriate. Once content is flagged, it is hidden from users and is reviewed by myCBSEguide team against our Community Guidelines. If content is found in violation, the user posting this content will be banned for 30 days from using Homework help section. Suspended users will receive error while adding question or answer. Question comments have also been disabled. Read community guidelines at https://mycbseguide.com/community-guidelines.html

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    0Thank You

    Gauri Petkar 1 year, 8 months ago

    Force

    1Thank You

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    • Posted by Gourichiti Cheran 1 year, 8 months ago

    CBSE > Class 08 > Science
    • 0 answers
    ANSWER

    • Posted by Ujwal Gupta 1 year, 8 months ago

    CBSE > Class 08 > Science
    • 2 answers

    Aanandita Singh 1 year, 8 months ago

    No

    0Thank You

    Sumit Mishra - 14 1 year, 8 months ago

    Matter

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    • Posted by Account Deleted 1 year, 8 months ago

    CBSE > Class 08 > Science
    • 2 answers

    Sonam Kumari 1 year, 7 months ago

    Plants contain nearly 90% water. Due to these reasons, the Germination of seeds does not take place under dry conditions.

    0Thank You

    Chetan Kr Mallik 1 year, 8 months ago

    90%

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    • Posted by Hitanshi Rawat 1 year, 8 months ago

    CBSE > Class 08 > Science
    • 1 answers

    Santhosh Nilavan M S 0448_14 1 year, 8 months ago

    One ovum matures and is released by one of the ovaries once in about 28 to 30 days. During this period, the wall of the uterus becomes thick so as to receive the egg, in case it is fertilised and begins to develop. This results in pregnancy. If fertilisation does not occur, the released egg, and the thickened lining of the uterus along with its blood vessels are shed off. This causes bleeding in women which is called menstruation.

    1Thank You

    ANSWER

    • Posted by Maddili Sriram 1 year, 8 months ago

    CBSE > Class 08 > Science
    • 1 answers

    Dhanush S 1 year, 8 months ago

    Electrostatic force

    1Thank You

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    • Posted by Daksh Sharma 1 year, 8 months ago

    CBSE > Class 08 > Science
    • 2 answers

    Dhanush S 1 year, 8 months ago

    Chicken pox and polio

    0Thank You

    Karan Patel 1 year, 8 months ago

    Chicken pox and polio

    0Thank You

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    • Posted by Anshika Sinha 1 year, 8 months ago

    CBSE > Class 08 > Science
    • 0 answers
    ANSWER

    • Posted by Anshika Sinha 1 year, 8 months ago

    CBSE > Class 08 > Science
    • 1 answers

    Anshika Sinha 1 year, 8 months ago

    Any body please make challenge and share me code please please please please

    2Thank You

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