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    • Posted by Tanuraj Randhawa 7 years, 10 months ago

    CBSE > Class 08 > Science
    • 2 answers

    Shashank Yadav 7 years, 10 months ago

    In reality moon does not changes it phases. Actually it is just change of perspective from earth which appears as a change in the moon's form.

    1Thank You

    Ankit Birodalai 7 years, 10 months ago

    Because earth rotates in it's on own orbit and moon revolves around the earth for which moon change it phases

    2Thank You

    ANSWER

    • Posted by Krupa Patel 7 years, 10 months ago

    CBSE > Class 08 > Science
    • 1 answers

    Shashank Yadav 7 years, 10 months ago

    By the process of electrolysis.

    1Thank You

    ANSWER

    • Posted by Sidharth Sidharth 7 years, 10 months ago

    CBSE > Class 08 > Science
    • 1 answers

    Yogita Ingle 7 years, 10 months ago

    Combustion is a chemical process in which a substance reacts with oxygen to give off heat. Some substances may also give light along with heat during combustion.
    Combustible Substance: A substance which can undergo combustion is called a combustible substance. A combustible substance is also called fuel. It can be solid, liquid or gas.
    Non-combustible Substance: A substance which cannot undergo combustion is called a non-combustible substance.

    0Thank You

    ANSWER

    • Posted by Ch Tony 7 years, 10 months ago

    CBSE > Class 08 > Science
    • 1 answers

    Ch Tony 7 years, 10 months ago

    The solution in the process of electrolysis

    2Thank You

    ANSWER

    • Posted by Ch Tony 7 years, 10 months ago

    CBSE > Class 08 > Science
    • 1 answers

    Ch Tony 7 years, 10 months ago

    The solution in the process of electrolysis

    1Thank You

    ANSWER

    • Posted by Sarthak Chadha 7 years, 10 months ago

    CBSE > Class 08 > Science
    • 1 answers

    Yogita Ingle 7 years, 10 months ago

    The water which is fit for drinking by human beings is called potable water. A quarter of the world’s population does not have access to safe drinking water.
    Characteristics of potable water :
    (i) Potable water is transparent.
    (ii) Potable water is odourless and colourless.
    (iii) Potable water is harmless or free from disease causing bacteria

    0Thank You

    ANSWER

    • Posted by Adwitiya Rai 7 years, 10 months ago

    CBSE > Class 08 > Science
    • 3 answers

    Ayushi Srivastava 7 years, 10 months ago

    Reaction of copper with bases are complex

    2Thank You

    Ayushi Srivastava 7 years, 10 months ago

    It react with oxygen to form hydrogen gas Reaction of copper with bases are copmlec

    2Thank You

    J Uday 7 years, 10 months ago

    It is sonorus, it is a good conductor of heat and electricity

    1Thank You

    ANSWER

    • Posted by Gaurav Kumar 7 years, 10 months ago

    CBSE > Class 08 > Science
    • 1 answers

    Yogita Ingle 7 years, 10 months ago

    Factors Affecting Friction:
    Irregularities on surfaces: Friction is created because of irregularities on surfaces. The irregularities on surfaces result in interlocking of two surfaces. The interlocking between two surfaces creates friction. Hence, the force of friction will be greater in case of rough surface than in case of smooth surface.
    Pressure Between two Surfaces: The force of friction increases with increase in pressure between two surfaces. You must have seen that moving a heavy box is difficult compared to moving a light box. Pressure is higher in case of a heavy box.

    0Thank You

    ANSWER

    • Posted by Shobha Bhati 7 years, 10 months ago

    CBSE > Class 08 > Science
    • 1 answers

    Tanu Ahlawat 7 years, 10 months ago

    An ambitious plan to clean highly polluted river ganga and save it.It was launched in 1985

    1Thank You

    ANSWER

    • Posted by Shobha Bhati 7 years, 10 months ago

    CBSE > Class 08 > Science
    • 1 answers

    Yogita Ingle 7 years, 10 months ago

    Effects of gases Pollution:

    • Carbon dioxide cause global warming because it is a potent greenhouse gas.
    • Smog: Smog is a mixture of smoke and fog. Smog reduces visibility, and thus can create problems for drivers at highways. Pilots face problems while landing or taking off; due to smog.
    • Carbon monoxide is a poisonous gas even at low concentration. It reduces oxygen carrying capacity of blood, and a person may die on exposure to carbon monoxide.
    • Acid Rain: Oxides of sulphur and nitrogen mix with rainwater to create acid rain. Acid rain can be harmful for living beings and also for non-living things. Acid rain corrodes the outer surface of buildings. This has caused the Taj Mahal becoming pale.
    • Suspended Particulate Matter in air can cause respiratory problems; like asthma and other respiratory disease.
    • Greenhouse Effect: Greenhouse gases; like carbon dioxide and methane trap solar radiation and thus increase atmospheric temperature. This is called greenhouse effect.
    • Global Warming: Overall increase in temperature of earth is called global warming.

    0Thank You

    ANSWER

    • Posted by Shobha Bhati 7 years, 10 months ago

    CBSE > Class 08 > Science
    • 1 answers

    Yogita Ingle 7 years, 10 months ago

    Sources of gasesous pollution:

    1. Natural Causes: Smoke and dust from forest fire and volcano
    2. Automobile Exhaust: Petrol and diesel are used as fuel in automobiles. Combustion of these fuels produces many polluting gases; like carbon dioxide, carbon monoxide, sulphur dioxide, nitrogen dioxide, etc. Automobile engines also produce minute particles which remain suspended in air. These particles are called Suspended Particulate Matter (SPM).
    3. Factories: Fossil fuel is also used in factories and hence factories produce pollutants; like carbon dioxide, sulphur dioxide and nitrogen dioxide.
    4. Construction sites and Stone Quarries: Construction sites and stone quarries produce lot of dust particles. Mining activities and power plants also produce dust particles.
    5. Households: Many fuels are used in kitchens, and thus kitchen is a significant source of air pollution.


    Effects of gases Pollution:

    • Carbon dioxide cause global warming because it is a potent greenhouse gas.
    • Smog: Smog is a mixture of smoke and fog. Smog reduces visibility, and thus can create problems for drivers at highways. Pilots face problems while landing or taking off; due to smog.
    • Carbon monoxide is a poisonous gas even at low concentration. It reduces oxygen carrying capacity of blood, and a person may die on exposure to carbon monoxide.
    • Acid Rain: Oxides of sulphur and nitrogen mix with rainwater to create acid rain. Acid rain can be harmful for living beings and also for non-living things. Acid rain corrodes the outer surface of buildings. This has caused the Taj Mahal becoming pale.
    • Suspended Particulate Matter in air can cause respiratory problems; like asthma and other respiratory disease.
    • Greenhouse Effect: Greenhouse gases; like carbon dioxide and methane trap solar radiation and thus increase atmospheric temperature. This is called greenhouse effect.
    • Global Warming: Overall increase in temperature of earth is called global warming.

    0Thank You

    ANSWER

    • Posted by Yadwinder Singh Guru 7 years, 10 months ago

    CBSE > Class 08 > Science
    • 2 answers

    Palak Kalantri 7 years, 10 months ago

    Certain group of stars often to form a recognised pattern in the sky are called constellation. Some of the constellation are Usra major and Cassiopeia

    0Thank You

    Palak Kalantri 7 years, 10 months ago

    Certain group of stars often seem to form a reco

    1Thank You

    ANSWER

    • Posted by Shakshi Bharwal 7 years, 10 months ago

    CBSE > Class 08 > Science
    • 0 answers
    ANSWER

    • Posted by Isheta Singh 7 years, 10 months ago

    CBSE > Class 08 > Science
    • 0 answers
    ANSWER

    • Posted by Prakul Sambyal 7 years, 10 months ago

    CBSE > Class 08 > Science
    • 0 answers
    ANSWER

    • Posted by Pallavi P 7 years, 10 months ago

    CBSE > Class 08 > Science
    • 1 answers

    Isheta Singh 7 years, 10 months ago

    It is the false feet or projection made by amoeba to capture food

    1Thank You

    ANSWER

    • Posted by Manaswi Jagtap 7 years, 10 months ago

    CBSE > Class 08 > Science
    • 1 answers

    Isheta Singh 7 years, 10 months ago

    The plants provide oxygen for animal respiration and also absorb carbon dioxide from the atmosphere. In this way plants help in maintaining the balance of Oxygen and Carbon dioxide in the atmosphere. Forest also influence climate ,water cycle and air quality. Because of these forests they are known as green lungs

    1Thank You

    ANSWER

    • Posted by Bharath Bharath 7 years, 10 months ago

    CBSE > Class 08 > Science
    • 3 answers

    Ritu Jha 7 years, 10 months ago

    Nuclear membrane separate nucleus from cytoplasm

    1Thank You

    Maya Devi 7 years, 10 months ago

    It protect the nuclear material from being indulging in the cytoplasm

    0Thank You

    Bharath Bharath 7 years, 10 months ago

    N

    2Thank You

    ANSWER

    • Posted by Kanchan Kanchan 7 years, 10 months ago

    CBSE > Class 08 > Science
    • 1 answers

    Maya Devi 7 years, 10 months ago

    We means हम

    1Thank You

    ANSWER

    • Posted by Harsh Methi 7 years, 10 months ago

    CBSE > Class 08 > Science
    • 1 answers

    Angel Biju 7 years, 10 months ago

    Force exerted dy atmosphere on unit surface area

    2Thank You

    ANSWER

    • Posted by Raghavi Muthukumar 7 years, 10 months ago

    CBSE > Class 08 > Science
    • 1 answers

    Maya Devi 7 years, 10 months ago

    1,it does not corrode 2,it is rust free 3,it is an expensive metal but by electroplating we can use it easily. 4,it is less reactive than other metals 5,it is lustrous

    0Thank You

    ANSWER

    • Posted by Isheta Singh 7 years, 10 months ago

    CBSE > Class 08 > Science
    • 1 answers

    Angel Biju 7 years, 10 months ago

    Mars is often called the 'Red Planet' because it appears in the sky as an orange-red star. The colour caused the ancient Greeks and Romans to name it after their god of war. Today, thanks to visiting spacecraft, we know that the planet's appearance is due to rust in the Martian rocks

    2Thank You

    ANSWER

    • Posted by Angel Biju 7 years, 10 months ago

    CBSE > Class 08 > Science
    • 6 answers

    Angel Biju 7 years, 10 months ago

    Thankss

    0Thank You

    Angel Biju 7 years, 10 months ago

    Yep thankssss

    0Thank You

    Diksha Sharma 7 years, 10 months ago

    Hello Nikita Singh ishu?????

    1Thank You

    Isheta Singh 7 years, 10 months ago

    I hope you understood...??

    0Thank You

    Isheta Singh 7 years, 10 months ago

    Reflection of light: scattering back off the light when falls on shining and smooth surfaces. Refraction of light: it is the bending of light as it passes from one substance to another. The bending is caused by the difference in density between the two substances.

    0Thank You

    Angel Biju 7 years, 10 months ago

    Could anyone answer this plsssss

    0Thank You

    ANSWER

    • Posted by Gauri Lodhi 6 B 7 years, 10 months ago

    CBSE > Class 08 > Science
    • 2 answers

    Maya Devi 7 years, 10 months ago

    It is called preparation of the soil by ploughing it,

    0Thank You

    Vrushali Deshmukh 7 years, 10 months ago

    Preparing the soil by ploughing it

    0Thank You

    ANSWER

    • Posted by Yash Meena 7 years, 10 months ago

    CBSE > Class 08 > Science
    • 1 answers

    Nivedita Pandey Sweety 7 years, 10 months ago

    It can be possible ☺☺

    1Thank You

    ANSWER

    • Posted by Anil Bhadana 7 years, 10 months ago

    CBSE > Class 08 > Science
    • 1 answers

    Anil Bhadana 7 years, 10 months ago

    fg

    0Thank You

    ANSWER

    • Posted by Suryansh Tiwari 7 years, 10 months ago

    CBSE > Class 08 > Science
    • 1 answers

    Suryansh Tiwari 7 years, 10 months ago

    When two compound of h2o mix the helium forms

    3Thank You

    ANSWER

    • Posted by Meghanath R 7 years, 10 months ago

    CBSE > Class 08 > Science
    • 1 answers

    Yash Meena 7 years, 10 months ago

    Laws of reflection are the following:- 1)It estates that the incident Ray the reflected Ray and the normal to the reflecting surface lie in the same plane. 2)The angle of incident is equal to the angle of reflection

    0Thank You

    ANSWER

    • Posted by Ashish Tomar 7 years, 10 months ago

    CBSE > Class 08 > Science
    • 0 answers
    ANSWER

    • Posted by K Vikash 7 years, 10 months ago

    CBSE > Class 08 > Science
    • 0 answers
    ANSWER

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