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    • Posted by Anushka Tryambake 7 years, 2 months ago

    CBSE > Class 07 > Science
    • 1 answers

    Anushka Shukla 7 years, 2 months ago

    When carbon dioxide is passed through lime water which is a dilute Solution of ca (oh) it turns milky due to the formation of calcium carbonate which is ca co3

    1Thank You

    ANSWER

    • Posted by Aayush Pawar 7 years, 2 months ago

    CBSE > Class 07 > Science
    • 1 answers

    Aayush Pawar 7 years, 2 months ago

    Fungi

    4Thank You

    ANSWER

    • Posted by Amritha V 7 years, 2 months ago

    CBSE > Class 07 > Science
    • 1 answers

    Yogita Ingle 7 years, 2 months ago

    Vinegar is chemically acetic acid and its chemical formula is CH3COOH. Baking soda, on the other hand is sodium bicarbonate, which is a mild base. Its chemical formula is NaHCO3 . Hence, when baking soda is added to vinegar, neutralisation reaction takes place and sodium acetate is formed along with water and carbon dioxide. Following is the chemical equation for the reaction
    CH3COOH + NaHCO3  → CH3COONa + H2O + CO2

    1Thank You

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    • Posted by Kanchan Ghildiyal 7 years, 2 months ago

    CBSE > Class 07 > Science
    • 1 answers

    Yogita Ingle 7 years, 2 months ago

    The process of deriving large crystals of pure substances from their solutions is known as crystallisation. It is a physical change. Crystals of salt are obtained by the evaporation of sea water.

    Similarly crystals of copper sulphate can be obtained by adding copper sulphate powder to the boiling solution of water and dilute sulphuric acid. This mixture when filtered and allowed to cool produces crystals of copper sulphate.

     

    1Thank You

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    • Posted by Laxmi Sai 7 years, 2 months ago

    CBSE > Class 07 > Science
    • 1 answers

    Yogita Ingle 7 years, 2 months ago

    When we are doing normal activities, the rate of breathing is normal. The rate of breathing increases when we do strenuous physical works; such as running, swimming, jogging, etc. the rate of breathing decreases when we take rest or when we are sleeping.

    1Thank You

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    • Posted by Subodh Ramola 7 years, 2 months ago

    CBSE > Class 07 > Science
    • 1 answers

    Deepak Adhikari 7 years, 2 months ago

    By gills

    1Thank You

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    • Posted by Swayam Singh 7 years, 2 months ago

    CBSE > Class 07 > Science
    • 3 answers

    Suchitra Sen 7 years, 2 months ago

    Top soil is most important because it is most fertile soil due to presence of humus . And this is rich in plant nutrient .

    0Thank You

    Ashlesha Maurya 7 years, 2 months ago

    Topsoil

    0Thank You

    Cheena Mittal 7 years, 2 months ago

    Humus is the most important layer

    0Thank You

    ANSWER

    • Posted by Anil Singh 7 years, 2 months ago

    CBSE > Class 07 > Science
    • 1 answers

    Yogita Ingle 7 years, 2 months ago

    Scrapping – It is employed by snails to feed on leaves.

    1Thank You

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    • Posted by Pavan Rajesh 7 years, 2 months ago

    CBSE > Class 07 > Science
    • 1 answers

    Ashlesha Maurya 7 years, 2 months ago

    The water passes down slowly thougth the soil is called percolation.

    2Thank You

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    • Posted by Anushka Shukla 7 years, 2 months ago

    CBSE > Class 07 > Science
    • 2 answers

    Suchitra Sen 7 years, 2 months ago

    Whan the oxygen reach in body the oxygen react with food in cell then it produce energy .

    0Thank You

    Ashlesha Maurya 7 years, 2 months ago

    We get energy by food . The oxygen burn the food and release energy.

    1Thank You

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    • Posted by Unnati Gupta 7 years, 2 months ago

    CBSE > Class 07 > Science
    • 1 answers

    Arunima Singh 7 years, 2 months ago

    I think poison never expires and "if" it expires it would be no more poisonous.

    1Thank You

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    • Posted by Khushi Jain 7 years, 2 months ago

    CBSE > Class 07 > Science
    • 1 answers

    Yogita Ingle 7 years, 2 months ago

    Amoeba is a unicellular organism where single cell performs all the processes like nutrition, respiration, excretion, reproduction etc. The process of procuring food is called as nutrition. Amoeba extends its pseudopodia when the food is found. Pseudopodium just wraps around the food molecule and forms a food vacuole around it. Inside the food molecule lot of digestive enzymes are secreted to break and digest the food molecule into smaller absorbable substances.

    5Thank You

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    • Posted by Tanishq Joshi 7 years, 2 months ago

    CBSE > Class 07 > Science
    • 0 answers
    ANSWER

    • Posted by Ata Zainab 7 years, 2 months ago

    CBSE > Class 07 > Science
    • 1 answers

    Meghna Thapar 5 years, 10 months ago

    Those reactions in which two compounds react by an exchange of ions to form two new compounds are called double displacement reactions.

    Example: AgNO3 (aq) + NaCl (aq)   AgCl (s)+ NaNO3 (aq)

    When silver nitrate solution is added to sodium chloride solution, then a white precipitate of silver chloride is formed alongwith sodium nitrate solution. In this reaction, two compounds, silver nitrate and sodium chloride, react to form two new compounds,, silver chloride and sodium nitrate.

    0Thank You

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    10

    • Posted by Ata Zainab 7 years, 2 months ago

    CBSE > Class 07 > Science
    • 0 answers
    ANSWER

    • Posted by Pragati Parashar 7 years, 2 months ago

    CBSE > Class 07 > Science
    • 2 answers

    Khushi Jain 7 years, 2 months ago

    It has two colours- red colour when added to acid and blue colour when added to base

    0Thank You

    Yogita Ingle 7 years, 2 months ago

    Litmus is extracted from Lichens. Lichen is a composite organism. Lichens consist of fungi and algae living in symbiotic relationship.
    Litmus is a purple coloured liquid in distilled water. Litmus comes in the form of strips of two colours. One is called blue litmus paper and another is called red litmus paper. Litmus liquid and litmus paper are used to detect the acidic or basic nature of a substance.

    2Thank You

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    • Posted by Pragati Parashar 7 years, 2 months ago

    CBSE > Class 07 > Science
    • 1 answers

    Yogita Ingle 7 years, 2 months ago

    Tusks are used for defense, offense, digging, lifting objects, gathering food, and stripping bark to eat from trees. They also protect the sensitive trunk, which is tucked between them when the elephant charges. In times of drought, elephants dig water holes in dry riverbeds by using their tusks, feet, and trunks.

    1Thank You

    ANSWER

    • Posted by Priyanshi Kumarisingh 7 years, 2 months ago

    CBSE > Class 07 > Science
    • 2 answers

    Pranay Patidar 7 years, 2 months ago

    Some organisms live together and share shelter and nutrients .Such type of relationship is called symbiotic relationship.

    1Thank You

    Priyanshi Kumarisingh 7 years, 2 months ago

    Some organismns live together and share their shelter, filter and nutrients those. Are known as simbiotic relationship

    4Thank You

    ANSWER

    • Posted by Akshit Sharma 7 years, 2 months ago

    CBSE > Class 07 > Science
    • 5 answers

    Nilpa Sitapara 7 years, 2 months ago

    37°C

    0Thank You

    Pranay Patidar 7 years, 2 months ago

    37

    0Thank You

    K. Harshini 7 years, 2 months ago

    37

    1Thank You

    Shaily Patel 7 years, 2 months ago

    37

    1Thank You

    Pranjal Dhakad 7 years, 2 months ago

    38

    1Thank You

    ANSWER

    • Posted by Jigyasa Patil 7 years, 2 months ago

    CBSE > Class 07 > Science
    • 1 answers

    Yogita Ingle 7 years, 2 months ago

    Cyclone is formed over tropical seas. Winds from opposite directions meet. This air is heated by the warm seas and so evaporates moisture from the ocean. This warm air rises up rapidly, cools and condenses to form clouds and produces an area of very low pressure. When moisture and air mix, it makes a collection of thunderstorms from which a cyclone can develop.
    In summer, the air rises up along with lot of moisture. After rising up to a certain height water vapour cools down and starts coming down in the form of water droplets. The swift drifting of water droplets creates electricity among clouds. This manifests in the form of lighting and sound. This is known as thunderstorm.

    2Thank You

    ANSWER

    • Posted by Vaishnavi Urankar 7 years, 2 months ago

    CBSE > Class 07 > Science
    • 1 answers

    Yogita Ingle 7 years, 2 months ago

    False: The coastline of India is vulnerable to cyclones.

    1Thank You

    ANSWER

    • Posted by Zeya Hassan 7 years, 2 months ago

    CBSE > Class 07 > Science
    • 1 answers

    Yogita Ingle 7 years, 2 months ago

    <div style="position: absolute; left: -99999px;">Alluvial soil- It is a loose form of soil that consists of sediments made up of eroded rock material. Silt, clay, sand and gravel are some of the constituents of alluvial soil. It is very fertile in nature and suitable for agriculture, particularly crops like rice. Black soil- It consists of large amount of clay and humus and is formed from basic rocks like basalt and in places of lava deposits. This type of soil is suitable for cotton cultivation. In India, it is found in the Deccan Plateau region.

    Read more: What is the difference between red soil and black soil? - What are the chemical constituents difference in plants grows in red soil and black soil :: Ask Me Fast at <a href="https://www.askmefast.com/What_is_the_difference_between_red_soil_and_black_soil-qna2431003.html#q1956619">https://www.askmefast.com/What_is_the_difference_between_red_soil_and_black_soil-qna2431003.html#q1956619</a></div>

    Black soil :- Important characteristics of black soils are:
    a. These soils are black in colour and are also known as regur soils. Black soil is ideal for growing cotton and is also known as black cotton soil.
    b. It is believed that climatic conditions along with the parent rock material are the important factors for the formation of black soil.
    c. The black soils are made up of extremely fine i.e. clayey material.
    d. They are well-known for their capacity to hold moisture.
    e. In addition, they are rich in soil nutrients, such as calcium carbonate, magnesium, potash and lime. These soils are generally poor in phosphoric contents.
    f. They develop deep cracks during hot weather, which helps in the proper aeration of the soil.
    g. These soils are sticky when wet and difficult to work on unless tilled immediately after the first shower or during the pre-monsoon period.
    Red soil :-
    a. Red soil develops on crystalline igneous rocks in areas of low rainfall.
    b. These soils develop a reddish colour due to diffusion of iron in crystalline and metamorphic rocks.
    c. It looks yellow when it occurs in a hydrated form.

     

    1Thank You

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    • Posted by Gurnoor Kaur 7 years, 2 months ago

    CBSE > Class 07 > Science
    • 5 answers

    Nilpa Sitapara 7 years, 2 months ago

    because it contains red colored pigment called hemoglobin. Hemoglobin binds with oxygen and transport it to all otjer parts of the body.

    0Thank You

    Pravjot Kaur 7 years, 2 months ago

    The blood contain red colour pigment called hemoglobin

    1Thank You

    Muskaan Aggarwal 7 years, 2 months ago

    The presence of haemoglobin makes them appear red.

    0Thank You

    Aaditya Ravi 7 years, 2 months ago

    It contains haemoglobim

    1Thank You

    Sukhman Padda 7 years, 2 months ago

    Because they contain a red coloured pigment called haemoglobin.

    2Thank You

    ANSWER

    • Posted by Sukhman Padda 7 years, 2 months ago

    CBSE > Class 07 > Science
    • 1 answers

    Meghna Thapar 5 years, 10 months ago

    As the plane accelerates down the runway, what’s actually being established is airflow over the wings. The wings have an “aerofoil” shape, and the upper surface causes the air that passes over the top to go a greater distance than the air that passes below. This creates a lower pressure above the wing, and a greater pressure below the wing. Thus the wing is lifted upwards. This principle is called Bernoulli’s principle.

    0Thank You

    ANSWER

    • Posted by Ankit Baghel 7 years, 2 months ago

    CBSE > Class 07 > Science
    • 1 answers

    Sona Reen 5 years, 9 months ago

    The Swift movement of the falling water droplets along with the rising air create lighting and sound. It is called thunderstorm

    3Thank You

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    • Posted by Ankit Baghel 7 years, 2 months ago

    CBSE > Class 07 > Science
    • 0 answers
    ANSWER

    • Posted by Vangala Murthy 7 years, 2 months ago

    CBSE > Class 07 > Science
    • 1 answers

    Arunima Singh 7 years, 2 months ago

    Autographs make their food by the process of photosynthesis. During photosynthesis chlorophyll containing cells of the leaves, in the presence of sunlight, uses carbon dioxide and water to synthesise carbohydrates and oxygen. During the process oxygen is released and carbon dioxide ultimately gets converted into starch.

    1Thank You

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    • Posted by Y.S. Poojitha 7 years, 2 months ago

    CBSE > Class 07 > Science
    • 3 answers

    Gurnoor Kaur 7 years, 2 months ago

    The number of times a person breathe is called its breathing rate

    1Thank You

    Shivam Arora 7 years, 2 months ago

    The number of times a person breath in a minute is called breathing rate

    1Thank You

    Khadija Jawadwala 7 years, 2 months ago

    The number of times a person breath in a miniute is termed as breathing rate

    0Thank You

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    • Posted by Aromal.Ak Aromal.Ak 7 years, 2 months ago

    CBSE > Class 07 > Science
    • 3 answers

    Gurnoor Kaur 7 years, 2 months ago

    Because they were an only source of food

    0Thank You

    Ansh Patel Pa 7 years, 2 months ago

    because of hetrotrophs

    0Thank You

    Raj Madnurkar 7 years, 2 months ago

    My fee :(

    3Thank You

    ANSWER

    • Posted by Ritik Yadav 7 years, 2 months ago

    CBSE > Class 07 > Science
    • 0 answers
    ANSWER

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