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    • Posted by Laxmi Prajapati 7 years ago

    CBSE > Class 08 > Science
    • 1 answers

    Yogita Ingle 7 years 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 7 years ago

    CBSE > Class 08 > Science
    • 1 answers

    Yogita Ingle 7 years 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 7 years ago

    CBSE > Class 08 > Science
    • 1 answers

    Yogita Ingle 7 years 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 7 years ago

    CBSE > Class 08 > Science
    • 1 answers

    Shivani Tiwari 7 years 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 7 years ago

    CBSE > Class 08 > Science
    • 1 answers

    Supriya Raj 7 years 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 7 years ago

    CBSE > Class 08 > Science
    • 2 answers

    Piyush Pathlab 7 years 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, 11 months ago

    Haemoglobin

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    • Posted by Aalisha Faruki 7 years ago

    CBSE > Class 08 > Science
    • 6 answers

    Rakesh Kumar 7 years 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 7 years ago

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

    1Thank You

    Yuvi Grover 5 years, 11 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 7 years 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 7 years ago

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

    0Thank You

    Kajal Pahwa 7 years ago

    Yes virus is a very small microorganism

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    • Posted by Isha Tagalpallewar 7 years ago

    CBSE > Class 08 > Science
    • 1 answers

    Rama Krishna 7 years 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 7 years ago

    CBSE > Class 08 > Science
    • 1 answers

    Pragati Yadav 7 years 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 7 years ago

    CBSE > Class 08 > Science
    • 1 answers

    Pooja K 7 years 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 7 years ago

    CBSE > Class 08 > Science
    • 1 answers

    Yogita Ingle 7 years 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 7 years ago

    CBSE > Class 08 > Science
    • 1 answers

    Yogita Ingle 7 years 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 7 years ago

    CBSE > Class 08 > Science
    • 1 answers

    Prince Prajapati 7 years ago

    Which rod ebonite,wooden,glass or any other

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    • Posted by Bibek Talukdar 7 years ago

    CBSE > Class 08 > Science
    • 4 answers

    Yuvi Grover 7 years 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 7 years ago

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

    0Thank You

    Jasmitha Do Your Best 7 years ago

    10/20=2

    0Thank You

    Tejasvi Gaikwad 7 years ago

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

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    • Posted by Bijay Kumar Mahapatro 7 years ago

    CBSE > Class 08 > Science
    • 1 answers

    Yogita Ingle 7 years ago

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

    2Thank You

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    • Posted by Jasmitha Do Your Best 7 years ago

    CBSE > Class 08 > Science
    • 1 answers

    Samruddhi Br 7 years ago

    What is the question

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    • Posted by Magada Anantha Lakshmi 7 years ago

    CBSE > Class 08 > Science
    • 3 answers

    K Raja 7 years ago

    It is the process to sepration of grains from the stalks

    0Thank You

    Anuneet Gupta 7 years ago

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

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    Prathiksha Prabakaran 7 years 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 7 years ago

    CBSE > Class 08 > Science
    • 2 answers

    Shubhangi Dubey 7 years ago

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

    0Thank You

    Priya Kushwah 7 years ago

    They are fertilized

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    • Posted by Sneha Khurana 7 years ago

    CBSE > Class 08 > Science
    • 2 answers

    Mansi Kumari 7 years ago

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

    1Thank You

    Smith Zade Zade 7 years ago

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

    1Thank You

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    • Posted by Raghav Rawat 7 years ago

    CBSE > Class 08 > Science
    • 2 answers

    Yuvi Grover 7 years ago

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

    1Thank You

    Mansi Kumari 7 years ago

    Yes .

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    • Posted by Hari Prasad Yedhoti 7 years ago

    CBSE > Class 08 > Science
    • 1 answers

    Sneha Khurana 7 years 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 7 years ago

    CBSE > Class 08 > Science
    • 1 answers

    Yuvi Grover 7 years 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 7 years ago

    CBSE > Class 08 > Science
    • 1 answers

    Isheta Singh 7 years 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 7 years ago

    CBSE > Class 08 > Science
    • 1 answers

    Meghna Thapar 6 years, 1 month 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 7 years ago

    CBSE > Class 08 > Science
    • 2 answers

    Jasmitha Do Your Best 7 years ago

    On which chapter

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    Yogita Ingle 7 years 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 7 years ago

    CBSE > Class 08 > Science
    • 2 answers

    K Raja 7 years ago

    Element which posses both metals and non metals are called metallidos

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    Yogita Ingle 7 years 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 7 years ago

    CBSE > Class 08 > Science
    • 1 answers

    Yogita Ingle 7 years 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 7 years ago

    CBSE > Class 08 > Science
    • 2 answers

    R...K.... Rathor 7 years ago

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

    0Thank You

    Manish Jain 7 years ago

    What is adam apple

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    • Posted by Akshad Chauhan 7 years ago

    CBSE > Class 08 > Science
    • 1 answers

    Yogita Ingle 7 years 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 7 years ago

    CBSE > Class 08 > Science
    • 4 answers

    Shreya Jain 7 years ago

    Protoplasm is the correct answer

    0Thank You

    Hari Prasad Yedhoti 7 years ago

    NUCLEUS

    0Thank You

    Kaavya Sethi 7 years ago

    Nucleus also known as nucleolus

    0Thank You

    Sachin Meena 7 years ago

    Nucleus

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