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    • Posted by Laxmi Prajapati 6 years, 9 months ago

    CBSE > Class 08 > Science
    • 1 answers

    Yogita Ingle 6 years, 9 months ago

    The two and fro motion of an object about its mean position is called oscillation.
    A motion that repeats itself over and over again about its mean  position, such that it remains confined within two well defined extreme  positions on either side of  the mean positionis called oscillatory  motion. All oscillatory motions are periodic but all periodic motions are not oscillatory.

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    • Posted by Laxmi Prajapati 6 years, 9 months ago

    CBSE > Class 08 > Science
    • 1 answers

    Yogita Ingle 6 years, 9 months ago

    • Pitch is defined as the number of waves perceived by the observer (listener).
    • Pitch depends on the frequency.
    • Pitch may be different for the different listeners for same frequency.

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    • Posted by Laxmi Prajapati 6 years, 9 months ago

    CBSE > Class 08 > Science
    • 1 answers

    Yogita Ingle 6 years, 9 months ago

    Wavelength – The distance between identical points in the adjacent cycles or crests of a wave is called wavelength. It is also measured in meters.
    Wavelength = speed / frequency

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    • Posted by Aasima S 6 years, 9 months ago

    CBSE > Class 08 > Science
    • 1 answers

    Shivani Tiwari 6 years, 9 months ago

    kaleidoscope is a toy consisting of tube containing mirror and pieces of coloured glass and paper whose reflection produce changing pattern when the tube is rotated. 1 )

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    • Posted by Abhay Tomar 6 years, 9 months ago

    CBSE > Class 08 > Science
    • 1 answers

    Supriya Raj 6 years, 9 months ago

    Planet 1.planets refers to the celestial objects that has a fixed path , 2.they change position, 3.they are small in size, 4.they have sphere shape, 5.they have low temperature, Stars 1.stars are the astronomial objects thet emit their own light, 2.they don't change position, 3.they are big in size, 4.they have dot shape, 5.they have high temperature,

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    • Posted by Nita Ambani 6 years, 9 months ago

    CBSE > Class 08 > Science
    • 2 answers

    Piyush Pathlab 6 years, 9 months ago

    Iron is a component present in the he. Iron helps to produce healthy oxygen. If you don't have enough iron then you don't able to produce healthy oxygen

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    Yuvi Grover 5 years, 8 months ago

    Haemoglobin

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    • Posted by Aalisha Faruki 6 years, 9 months ago

    CBSE > Class 08 > Science
    • 6 answers

    Rakesh Kumar 6 years, 9 months ago

    Yes ,it is virus is a micro organism as it is involved in the major group of microorganisms

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    K Raja 6 years, 9 months ago

    No, viruses are not considered as microorganism. It is only microscopic

    1Thank You

    Yuvi Grover 5 years, 8 months ago

    Yes , virus is also a type of microorganism but it is different for other microorganisms as it has the characteristics of both living and non living.

    0Thank You

    Raisha Prakash 6 years, 9 months ago

    No ,virus is not a microorganism as it rwproduces only in host body and arw non-living outside jost body.

    0Thank You

    Pooja K 6 years, 9 months ago

    It's a microorganism but it not fits in the catgory

    0Thank You

    Kajal Pahwa 6 years, 9 months ago

    Yes virus is a very small microorganism

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    • Posted by Isha Tagalpallewar 6 years, 9 months ago

    CBSE > Class 08 > Science
    • 1 answers

    Rama Krishna 6 years, 9 months ago

    At puberty,the voice box or larynx begins to grow. Boys develip larger voice boxes. The growing voice box in boys can be seen as a protruding part of the throat called adam's apple

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    • Posted by Sunita Rani 6 years, 9 months ago

    CBSE > Class 08 > Science
    • 1 answers

    Pragati Yadav 6 years, 9 months ago

    It may change the shape of an object. It may change the state of motion of an object. It may change the speed of an object.

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    • Posted by Namanjot Kaur 6 years, 9 months ago

    CBSE > Class 08 > Science
    • 1 answers

    Pooja K 6 years, 9 months ago

    * some microorganisms spoil food , clothes and leather. * Microorganisms are responsible for the various communicable dieseas for eg: flu , cough , cold etc. * Malaria is caused by the microorganism called protozoa. * Bacteria causes disease like cholera , typhoid etc.

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    • Posted by Shambhavi Bansal 6 years, 9 months ago

    CBSE > Class 08 > Science
    • 1 answers

    Yogita Ingle 6 years, 9 months ago

    • Vacuoles are membrane bound transparent organelle present in both animal and plant cell.
    • They are small and many in animal cells whereas large and one in most of the plant cells.
    • Vacuoles preserve the turgidity of the cell and also store waste material in them.
    • Vacuoles are occupied with water containing inorganic and organic molecules.

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    • Posted by Joginder Singh 6 years, 9 months ago

    CBSE > Class 08 > Science
    • 1 answers

    Yogita Ingle 6 years, 9 months ago

    • A planet revolves around the star while  a satellite revolves around the planet.
    • A planet is generally fully or almost the shape of a sphere while a satellite is not.
    • A planet may gravitationally or magnetically have a satellite in control while a satellite cannot attract anything.
    • A planet is always natural while a satellite may be artificial.
    • A planet is formed by a collision of smaller rocks while a natural satellite is formed by a large boulder smashing into the planet.

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    • Posted by Laxmi Prajapati 6 years, 9 months ago

    CBSE > Class 08 > Science
    • 1 answers

    Prince Prajapati 6 years, 9 months ago

    Which rod ebonite,wooden,glass or any other

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    • Posted by Bibek Talukdar 6 years, 9 months ago

    CBSE > Class 08 > Science
    • 4 answers

    Yuvi Grover 6 years, 9 months ago

    Timeperiod = 20/10=2 Frequency = No. of oscillations / time taken So, frequency = 10/20 = 1/2 hz. Is it right?

    0Thank You

    Pooja K 6 years, 9 months ago

    Frequency=10/20=1/2 Time period =1/1/2

    0Thank You

    Jasmitha Do Your Best 6 years, 9 months ago

    10/20=2

    0Thank You

    Tejasvi Gaikwad 6 years, 9 months ago

    Time period can be found by formula 1/Frequency ,so first find Frequency.

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    • Posted by Bijay Kumar Mahapatro 6 years, 9 months ago

    CBSE > Class 08 > Science
    • 1 answers

    Yogita Ingle 6 years, 9 months ago

    Metamorphosis in insects is controlled by insect hormones.
    In a frog, it is controlled by thyroxine, the hormone produced by thyroid.

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    • Posted by Jasmitha Do Your Best 6 years, 9 months ago

    CBSE > Class 08 > Science
    • 1 answers

    Samruddhi Br 6 years, 9 months ago

    What is the question

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    • Posted by Magada Anantha Lakshmi 6 years, 9 months ago

    CBSE > Class 08 > Science
    • 3 answers

    K Raja 6 years, 9 months ago

    It is the process to sepration of grains from the stalks

    0Thank You

    Anuneet Gupta 6 years, 9 months ago

    winnowing is the method of seperation of grains and dust through wind

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    Prathiksha Prabakaran 6 years, 9 months ago

    The seperation of the grains from the husk and chaff is done by a process called winnowing

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    • Posted by Sneha Khurana 6 years, 9 months ago

    CBSE > Class 08 > Science
    • 2 answers

    Shubhangi Dubey 6 years, 9 months ago

    They are boiled before selling . So it kills the life growing inside it

    0Thank You

    Priya Kushwah 6 years, 9 months ago

    They are fertilized

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    • Posted by Sneha Khurana 6 years, 9 months ago

    CBSE > Class 08 > Science
    • 2 answers

    Mansi Kumari 6 years, 9 months ago

    This is because of the action of sweat gland in our skin

    1Thank You

    Smith Zade Zade 6 years, 9 months ago

    Because during puberty..... Devolpment of their organs........

    1Thank You

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    • Posted by Raghav Rawat 6 years, 9 months ago

    CBSE > Class 08 > Science
    • 2 answers

    Yuvi Grover 6 years, 9 months ago

    All the objects which we can see are the reflecters of light.

    1Thank You

    Mansi Kumari 6 years, 9 months ago

    Yes .

    1Thank You

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    • Posted by Hari Prasad Yedhoti 6 years, 9 months ago

    CBSE > Class 08 > Science
    • 1 answers

    Sneha Khurana 6 years, 9 months ago

    The virtual mirror gives virtual image which is erect .....the virtual image cannot be taken on the screen

    3Thank You

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    • Posted by Nirmala Sharma 6 years, 9 months ago

    CBSE > Class 08 > Science
    • 1 answers

    Yuvi Grover 6 years, 9 months ago

    Inner ear, 1) The sound waves enter our ear through inner ear. Inner ear contains a 2 to 3 inch Canal known as ear Canal . 2) This ear canal send the sound waves to the ear drum on receiving the sound waves the ear drum vibrates and send these vibrations to middle ear. Middle ear, In middle ear there are three small bones present (hammer, Anvil and stirrup) these three bones and named according to their shapes on receiving the vibration from the ear drum these bones amplify it and then send the amplified vibrations to outer ear. Outer ear In outer ear there is a circular tube present known as cochlea. cochlea convert these vibrations into nerve impulses and then the auditory nerves present near cochlea send these nerve impulses to the brain and then brain decodes these nerve impulses into specific sounds

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    • Posted by Aarush Verma 6 years, 9 months ago

    CBSE > Class 08 > Science
    • 1 answers

    Isheta Singh 6 years, 9 months ago

    They are golgi apparatus , plastids , lysosomes , vacuoles , mitochondria and endoplasmic reticulum - two types smooth ER and rough ER

    1Thank You

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    • Posted by R...K.... Rathor 6 years, 9 months ago

    CBSE > Class 08 > Science
    • 1 answers

    Meghna Thapar 5 years, 10 months ago

    A biodiversity hotspot is a biogeographic region with significant levels of biodiversity that is threatened by human habitation.

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    • Posted by Jasmitha Do Your Best 6 years, 9 months ago

    CBSE > Class 08 > Science
    • 2 answers

    Jasmitha Do Your Best 6 years, 9 months ago

    On which chapter

    0Thank You

    Yogita Ingle 6 years, 9 months ago

    Myopia Hypermetropia
    Myopia is also called as Near-sightedness. Hypermetropia is called as Far-sightedness.
    In Myopia, the person can see nearby objects, but cannot see far objects clearly. In Hypermetropia, the person can see far objects clearly, but cannot see near objects clearly.
    In people with myopia, the image is formed in front of retina in the eye. In people with hypermetropia, the image is formed behind the retina in the eye.
    The size of the eye-ball increases in the myopic people. The size of the eye-ball decreases in the hypermetropic people.

     

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    • Posted by Jasmitha Do Your Best 6 years, 9 months ago

    CBSE > Class 08 > Science
    • 2 answers

    K Raja 6 years, 9 months ago

    Element which posses both metals and non metals are called metallidos

    0Thank You

    Yogita Ingle 6 years, 9 months ago

    The elements which can show properties of both metals and non-metals are called metalloids. Examples: Arsenic, Germanium, Silicon.

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    • Posted by Jasmitha Do Your Best 6 years, 9 months ago

    CBSE > Class 08 > Science
    • 1 answers

    Yogita Ingle 6 years, 9 months ago

     The various properties of metals can be improved by mixing other metals in it.  The homogeneous mixture of two or more metals is called alloys.
    Example: Duralumin  is an alloy of Al,Cu,Mg,Mn
    An alloy is prepared by mixing various metals in molten state in required proportion and then cooling their mixture to the room temperature.

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    • Posted by Sabitarani Kunal 6 years, 9 months ago

    CBSE > Class 08 > Science
    • 2 answers

    R...K.... Rathor 6 years, 9 months ago

    The growing voice box in boy can be seen as a protruding part of throat called adam apple

    0Thank You

    Manish Jain 6 years, 9 months ago

    What is adam apple

    0Thank You

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    • Posted by Akshad Chauhan 6 years, 9 months ago

    CBSE > Class 08 > Science
    • 1 answers

    Yogita Ingle 6 years, 9 months ago

    • Determine your level of risk.
    • Stay in well-screened areas at night.
    • Always use a bed-net impregnated with insecticides.
    • Use mosquito repellent.
    • Go for long sleeves.
    • Insect repellent again.
    • Sunscreen comes first - repellent second.

    2Thank You

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    • Posted by Atmali Brothersto 6 years, 9 months ago

    CBSE > Class 08 > Science
    • 4 answers

    Shreya Jain 6 years, 9 months ago

    Protoplasm is the correct answer

    0Thank You

    Hari Prasad Yedhoti 6 years, 9 months ago

    NUCLEUS

    0Thank You

    Kaavya Sethi 6 years, 9 months ago

    Nucleus also known as nucleolus

    0Thank You

    Sachin Meena 6 years, 9 months ago

    Nucleus

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