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    • Posted by Ghar Singh 4 years, 4 months ago

    CBSE > Class 09 > Science
    • 3 answers

    Priya Singh 4 years, 4 months ago

    Any substance or particle that has mass and ouccpies space is called matter Matter is made of of small particels or atmos Two properties are It cannot be compressed when in liquid or gaseous state Molecules are tightly packed when in solid state

    0Thank You

    Yogita Ingle 4 years, 4 months ago

     Anything which occupies space and has mass is called  matter. . Food, water, air, clothes, table, chair, plants and trees. Indian philosophers said that all the matter living or non-living, was made up of five basic elements air, earth, fire, sky and water. On the basis of its physical properties and on the basis of its chemical properties. On the basis of chemical properties the matter is classified as elements, compounds and mixtures.

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    ?? ?? 4 years, 4 months ago

    Matter has a mass or occupies space is called matter

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    • Posted by Satwik Banerjee 4 years, 4 months ago

    CBSE > Class 09 > Science
    • 3 answers

    Swagat Panda 4 years, 4 months ago

    Because human body is made from cell

    1Thank You

    Priya Singh 4 years, 4 months ago

    Cell is known as the structural and the functional unit of life because all living organism are made up of cells Anf cell performs all the functins in the bosy of a living organism

    1Thank You

    Yogita Ingle 4 years, 4 months ago

    Cells are the structural and functional units of life. A cell is capable of independent existence and can carry out all the vital functions for living. A cell carries out nutrition, respiration, excretion, transportation and reproduction; the way an individual organism does. Unicellular organisms are capable of independent existence which shows a cell’s capability to exist independently. Due to this, a cell is called the fundamental and structural unit of life. All living beings are composed of the basic unit of life, i.e. cell.
    Cells also need to manage a wide range of functions like growing and moving. In order to carry out all these things, cells need energy. The main energy source for most cells to function is ATP.

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    • Posted by Yashobanti Sunari 4 years, 4 months ago

    CBSE > Class 09 > Science
    • 1 answers

    Yogita Ingle 4 years, 4 months ago

    PLANT TISSUES

    ANIMAL TISSUES
    • Dead supportive tissues are more abundant as compared to living tissues.
    • Living supportive tissues are more abundant as compared to dead tissues.
    • Require less maintenance energy.
    • Require more maintenance energy.
    • Differentiation of meristematic and permanent tissues.
    • No differentiation of meristematic and permanent tissues.
    • Organisation is simple.
    • Organisation is relatively complex.
    • Tissue organisation is meant for stationary habit of plants.
    • Tissue organisation is meant for high mobility of animals.

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    • Posted by Gangamma Slv 4 years, 4 months ago

    CBSE > Class 09 > Science
    • 1 answers

    Priya Singh 4 years, 4 months ago

    Displacement is the shorteat distance between intinal and the final postion So as you want to know the initial displacement thats means when the dis and disp both are same so the starting will be intial displ Not sure

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    • Posted by Divyanshu Mishra 4 years, 4 months ago

    CBSE > Class 09 > Science
    • 1 answers

    Priya Singh 4 years, 4 months ago

    Like normal infectious diseases so other members should not be in contact with the sick person for a long period of time Because infectious diseases spread from sneeze drops , hand shake and as well as the breath But yes the other members should wear the mask But not for corona A person who is suffering from corona shoudnt come in contact with anyone And should use his or her esstinals seperately not with the members And if in home Then should live in only 1 room and shouldnt use family towel,soap,washroom and should not eat with family

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    • Posted by Bhagwan Singh Sevniya 4 years, 4 months ago

    CBSE > Class 09 > Science
    • 2 answers

    Kelvin Sharma 4 years, 4 months ago

    Ice and water float on water because they have low surface tension as compared to water. Thank you ????

    0Thank You

    Yogita Ingle 4 years, 4 months ago

    The mass per unit volume of a substance is called density (density = mass/volume). As the volume of a substance increases, its density decreases.

    Liquids have lower density than that of solids. Water is also a liquid so it should also have less density than that of solid that is ice.

    Though ice is a solid, but it has a cage like structure hence there are large number of empty spaces between its particles. These spaces are larger as compared to the spaces present between the particles of water. Thus for a given mass of water, volume of ice is greater than that of water. Hence, the density of ice is less than that of water. A substance with lower density than water can float on water. Therefore, ice floats on water.

    4Thank You

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    • Posted by Prachi Garg 4 years, 4 months ago

    CBSE > Class 09 > Science
    • 3 answers

    Daniel Thomas 4 years, 4 months ago

    The cell theory is that, all the animals and plants are composed of cells and that the cell is the basic unit of life. This was presented by two biologists, Schleiden(1838) and Schwann(1839). The cell theory was further expanded by Virchow(1855) by suggesting that all cells arise from pre-existing cells. Hope this was helpful....Thank You !!!

    1Thank You

    Bhagwan Singh Sevniya 4 years, 4 months ago

    He exclaimeda thin slice of cork under his sepf devloped primitive microscope. He seen a bricks like structures aslike as wall is made up of bricks as same as human are made of cells .He tell that isa basic building block of life.

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    Bhagwan Singh Sevniya 4 years, 4 months ago

    Cell was intrduced by an English scientist Robert hooke in his book micrographia publised in year 1665 .

    1Thank You

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    • Posted by Sumit Kumar 4 years, 4 months ago

    CBSE > Class 09 > Science
    • 1 answers

    Yogita Ingle 4 years, 4 months ago

    The solubility of a substance depends on the physical and chemical properties of that substance. In addition to this, there are a few conditions which can manipulate it. Temperature, pressure and the type of bond and forces between the particles are few among them.

    • Temperature:

      By changing the temperature we can increase the soluble property of a solute. Generally, water dissolves solutes at 20° C or 100° C. Sparingly soluble solid or liquid substances can be dissolved completely by increasing the temperature. But in the case of gaseous substance, temperature inversely influences solubility i.e. as the temperature increases gases expand and escapes from their solvent.

    • Forces and Bonds:

      Like dissolves in like. The type of intermolecular forces and bonds vary among each molecule. The chances of solubility between two unlike substances are more challengeable than the like substances. For example, water is a polar solvent where a polar solute like ethanol is easily soluble.

    • Pressure:

      Gaseous substances are much influenced than solids and liquids by pressure. When the partial pressure of gas increases, the chance of its solubility is also increased. A soda bottle is an example of where CO2 is bottled under high pressure.

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    • Posted by Aparna Singh 4 years, 4 months ago

    CBSE > Class 09 > Science
    • 1 answers

    Yogita Ingle 4 years, 4 months ago

    Let us assume, the final velocity with which ball will strike the ground be ‘v’ and time it takes to strike the ground be ‘t’
    Initial Velocity of ball, u =0
    Distance or height of fall, s =20 m
    Downward acceleration, a =10 m s-2
    As we know, 2as =v2-u2
    v2 = 2as+ u2
    = 2 x 10 x 20 + 0
    = 400
    = Final velocity of ball, v = 20 ms-1
    t = (v-u)/a
    ´Time taken by the ball to strike = (20-0)/10
    = 20/10
    = 2 seconds

    0Thank You

    ANSWER

    • Posted by Aparna Singh 4 years, 4 months ago

    CBSE > Class 09 > Science
    • 1 answers

    Yogita Ingle 4 years, 4 months ago

    Let us assume, the final velocity with which ball will strike the ground be ‘v’ and time it takes to strike the ground be ‘t’
    Initial Velocity of ball, u =0
    Distance or height of fall, s =20 m
    Downward acceleration, a =10 m s-2
    As we know, 2as =v2-u2
    v2 = 2as+ u2
    = 2 x 10 x 20 + 0
    = 400
    = Final velocity of ball, v = 20 ms-1
    t = (v-u)/a
    ´Time taken by the ball to strike = (20-0)/10
    = 20/10
    = 2 seconds

    0Thank You

    ANSWER

    • Posted by Suhani Rajput 4 years, 4 months ago

    CBSE > Class 09 > Science
    • 2 answers

    Kartikay Singh 4 years, 4 months ago

    0.002km/ph

    1Thank You

    Sonu Kumar 4 years, 4 months ago

    Dis =100m =0.1km Time =50h Speed=dis/time 0.1km/50h=0.002km

    0Thank You

    ANSWER

    • Posted by Hemant Giri 4 years, 4 months ago

    CBSE > Class 09 > Science
    • 1 answers

    Yogita Ingle 4 years, 4 months ago

    Solution Sol SuspensionA solution is a homogeneous mixture of two or more substances. A sol is a heterogeneous mixture. Suspension is a heterogeneous mixture.
    The particles of a solution are smaller than 1 nm (10-9 metre) in diameter. So, they cannot be seen by naked eyes. The size of particles of a sol is too small to be individually seen by naked eyes. It is between 1 nm and 100 nm in diameter The particles of a suspension can be seen by the naked eye. Their size is larger than 100 nm in diameter.
    Due to small particle size, they do not scatter a beam of light passing through them. Thus, the path of light is not visible in a solution. Sols are big enough to scatter a beam of light passing through them and make its path visible. The particles of a suspension scatter a beam of light passing through it and make its path visible.
    The solute particles do not settle down when left undisturbed, i.e., a solution is stable. They do not settle down when left undisturbed, i.e., a sol is quite stable. The solute particles settle down when a suspension is left undisturbed, i.e., a suspension is unstable.
    The solute particles cannot be separated from the mixture by the process of filtration. The solute particles cannot be separated from the mixture by the process of filtration. They can be separated from the mixture by the process of filtration.

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    • Posted by Md. Affanuddin 4 years, 4 months ago

    CBSE > Class 09 > Science
    • 2 answers

    Johnson Gi 4 years, 4 months ago

    Prokaryotic Cell. The distinction between prokaryotes and eukaryotes is considered to be the most important distinction among groups of organisms. Eukaryotic cells contain membrane-bound organelles, such as the nucleus, while prokaryotic cells do not.

    1Thank You

    Kelvin Sharma 4 years, 4 months ago

    Prokaryotes *Cells of organism lacks nuclear membrane. *Nucleolus is absent. *Single chromosomes. *Reproduction is always asexual. *Always unicellular. *Membrane bound cell organelles are absent. *Centriole is absent. *Cell division is by binary fission. *Example: Bacteria, Blue green algae, etc. Eukaryotes *Cells of organism have nuclear membrane. *Nucleolus is present. *Single or multi chromosomes. *Reproduction is both sexual and asexual. *Often multicellular. *Membrane bound organelles are present like mitochondria. *Centriole is present only in animals cell. *Cell division is by mitosis or meiosis. *Example: Fungi, Plant cell, Animal cell etc. Thank you ??

    2Thank You

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    • Posted by Sapna Gupta 4 years, 4 months ago

    CBSE > Class 09 > Science
    • 4 answers

    Johnson Gi 4 years, 4 months ago

    Endoplasmic reticulum (ER), in biology, a continuous membrane system that forms a series of flattened sacs within the cytoplasm of eukaryotic cells and serves multiple functions, being important particularly in the synthesis, folding, modification, and transport of proteins .

    1Thank You

    Johnson Gi 4 years, 4 months ago

    An organelle consisting of a network of membranes within the cytoplasm of eukaryotic cells that is important in protein synthesis and folding and is involved in the transport of cellular materials. The endoplasmic reticulum can be continuous in places with the membrane of the cell nucleus.

    1Thank You

    Daniel Thomas 4 years, 4 months ago

    The endoplasmic reticulum is a large network of membrane bound tubes and sheets. Its gives internal support to the cell. There are 2 types of ER : (1)Rough endoplasmic reticulum (RER) (2)Smooth endoplasmic reticulum (SER) RER has ribosomes which helps for synthesising proteins. SER DOES NOT HAVE RIBOSOMES but helps in the secretion of lipids. Hope this was helpfull....All The Best

    2Thank You

    Daniel Thomas 4 years, 4 months ago

    The endoplasmic reticulum (ER)

    1Thank You

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    • Posted by Aparna Singh 4 years, 4 months ago

    CBSE > Class 09 > Science
    • 1 answers

    Ritik Varshney 4 years, 4 months ago

    For uniform motion of an object, it's distance time graph is in straight line with constant slope. For non uniform motion of an object it's distance time graph is a curved line with increasing and decreasing slope.

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    • Posted by Palak Kushwaha 4 years, 4 months ago

    CBSE > Class 09 > Science
    • 2 answers

    Johnson Gi 4 years, 4 months ago

    Volatility describes how easily a substance will vaporize (turn into a gas or vapor). A volatile substance can be defined as (1) a substance that evaporates readily at normal temperatures and/or (2) one that has a measurable vapor pressure. ... examples of volatile liquids--- alcohol, petrol, acetone, ether etc.

    2Thank You

    Rishabh Ranjan Kumar Singh 4 years, 4 months ago

    Which is easily evaporated in air is knows as volatile liquid

    2Thank You

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    • Posted by Muskan Kumari 4 years, 4 months ago

    CBSE > Class 09 > Science
    • 1 answers

    Yogita Ingle 4 years, 4 months ago

    This is just because of Newton’s First Law of Motion which states as below:

    Everybody continues in its state of rest or of uniform motion in a straight line unless and until it is compelled by an external force to change that state.

    So when the bus or train stopped suddenly, a passenger sits inside tends to fall forward. Because the lower part of the body comes to rest with the bus while the upper part tends to continue its motion due to inertia.

    1Thank You

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    • Posted by Komal Gupta 4 years, 4 months ago

    CBSE > Class 09 > Science
    • 1 answers

    Srishti Jakhmola 4 years, 4 months ago

    Final velocity - intial velocity\time taken

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    • Posted by Johnson Gi 4 years, 4 months ago

    CBSE > Class 09 > Science
    • 3 answers

    Johnson Gi 4 years, 4 months ago

    Thanks

    1Thank You

    Ritik Varshney 4 years, 4 months ago

    The green pigment present in leaves of plant that helps in photosynthesis.

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    Johnson Gi 4 years, 4 months ago

    the green substance in plants that takes in light from the sun to help them grow पौधों में पाया जाने वाला हरा पदार्थ जो सूर्य की किरणों को आत्‍मसात कर पौधों की वृद्धि में सहायता करता है; पर्णहरित, क्‍लोरोफ़िल

    1Thank You

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    • Posted by Tannu Saini 4 years, 4 months ago

    CBSE > Class 09 > Science
    • 1 answers

    Tannu Saini 4 years, 4 months ago

    .use the words ....

    2Thank You

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    • Posted by Khushboo Chauhan 4 years, 4 months ago

    CBSE > Class 09 > Science
    • 2 answers

    Johnson Gi 4 years, 4 months ago

    In cell biology, the cytoplasm is a highly viscous (gel-like) substance enclosed within the cell membrane. It is composed of water (about 85 percent), proteins (10 to 15 percent), lipids (2 to 4 percent), nucleic acids, inorganic salts and polysaccharides in smaller amounts.

    1Thank You

    Kelvin Sharma 4 years, 4 months ago

    It is composed of water (about 85 percent), proteins (10 to 15 percent), lipids (2 to 4 percent), nucleic acids, inorganic salts and polysaccharides in smaller amounts. Thank you ??

    1Thank You

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    • Posted by Ramakrishna Mokara 4 years, 4 months ago

    CBSE > Class 09 > Science
    • 1 answers

    Geeta Srivastava 4 years, 4 months ago

    Yes ,because when cell gets damaged it bursrt open to destroy the cell.

    1Thank You

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    • Posted by Siya Rathore 4 years, 4 months ago

    CBSE > Class 09 > Science
    • 3 answers

    Johnson Gi 4 years, 4 months ago

    An alloy is a uniform mixture. It is made up of two or more chemical elements, of which at least one is a metal. ... Most alloys are made by melting the metals, mixing them while they are liquid to form a solution, then leaving them to cool and turn solid again.

    1Thank You

    Rishabh Ranjan Kumar Singh 4 years, 4 months ago

    Alloy is anything else mixtures with other metals

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    Yogita Ingle 4 years, 4 months ago

    Alloys are metal mixtures with other elements, the precise combination of which is governed by the properties required. In general, alloys are considered metallic in nature, i.e. they have good thermal and electrical conductivity. An alloy is a homogeneous mixture of two or more metals or a metal and a nonmetal.

    1Thank You

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    • Posted by Rohit Sawase 4 years, 4 months ago

    CBSE > Class 09 > Science
    • 1 answers

    Siya Rathore 4 years, 4 months ago

    To deal with waste material

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    • Posted by Prachi Garg 4 years, 4 months ago

    CBSE > Class 09 > Science
    • 1 answers

    Yogita Ingle 4 years, 4 months ago

    In living beings the osmosis has the following importance:

    1. The osmosis aids in transportation of the nutrients from cell to cell and wastes are removed from the cells.

    2. The osmosis prevents the cell from bursting it creates the turgor pressure inside the cell.

    3. Through the process of osmosis the roots absorb the moisture and nutrients from the soil.

    4. It keeps the toxic waste separated from the blood stream.

    5. The process of blood purification in kidneys is also dependent upon osmosis.

    2Thank You

    ANSWER

    • Posted by Aakash Tripathi 4 years, 4 months ago

    CBSE > Class 09 > Science
    • 4 answers

    Johnson Gi 4 years, 4 months ago

    Metals have one to three electrons in their outer shell, whereas non-metals have four to eight electrons. Another difference is that metals tend to lose their valence electrons, but non-metals share or gain valence electrons. ... While metals are good conductors of electricity and heat, non-metals are poor conductors.

    1Thank You

    Yogita Ingle 4 years, 4 months ago

    <th>Metals</th> <th>Nonmetals</th>
    These are solids at room temperature except mercury These exist in all three states
    These are very hard except sodium These are soft except diamond
    These are malleable and ductile These are brittle and can be breakdown into pieces
    These are shiny These are non-lustrous except iodine
    Electropositive in nature Electronegative in nature
    Have high densities Have low densities

    0Thank You

    Pulkit Sahu 4 years, 4 months ago

    what is matter

    1Thank You

    Aakash Tripathi 4 years, 4 months ago

    What is answer

    2Thank You

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    • Posted by Krishna Patil 4 years, 4 months ago

    CBSE > Class 09 > Science
    • 1 answers

    Meghna Thapar 4 years, 4 months ago

    If we put an animal cell or a plant cell into a solution of sugar or salt in water then three things could happen:

    (i) When eukaryotic cells are placed in hypotonic solutions, the water molecules will enter into the cell and the cell will swell up.

    (ii) If eukaryotic cells are placed in hypertonic solutions, the water molecules will come out of the cell and the cell with shrink.

    (iii) If the eukaryotic cell is placed in isotonic solution, the amount of water molecule will remain the same; it will neither move out or will go inside. The cell will remain same sized.

    1Thank You

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    • Posted by Guptha Gadari Guptha 4 years, 4 months ago

    CBSE > Class 09 > Science
    • 1 answers

    Kartikay Singh 4 years, 4 months ago

    France is a country it's greatest rival is England

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    • Posted by Prachi Garg 4 years, 4 months ago

    CBSE > Class 09 > Science
    • 3 answers

    Rishabh Ranjan Kumar Singh 4 years, 4 months ago

    The osmosis aids in transportation of the nutrients from cell to cell and wastes are removed from the cell

    0Thank You

    Rishabh Ranjan Kumar Singh 4 years, 4 months ago

    The osmosis aids in transportation ation

    0Thank You

    Yogita Ingle 4 years, 4 months ago

    In living beings the osmosis has the following importance:

    1. The osmosis aids in transportation of the nutrients from cell to cell and wastes are removed from the cells.

    2. The osmosis prevents the cell from bursting it creates the turgor pressure inside the cell.

    3. Through the process of osmosis the roots absorb the moisture and nutrients from the soil.

    4. It keeps the toxic waste separated from the blood stream.

    5. The process of blood purification in kidneys is also dependent upon osmosis.

    1Thank You

    ANSWER

    • Posted by Kalaiselvi V 4 years, 4 months ago

    CBSE > Class 09 > Science
    • 1 answers

    Kishan Bansal 4 years, 4 months ago

    liquid does not have fixed shape but fixed volume

    0Thank You

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