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    • Posted by Ansh Roy Lakshya 7 years, 11 months ago

    CBSE > Class 08 > Science
    • 1 answers

    Yogita Ingle 7 years, 11 months ago

    Organisms that are so small that they can only be seen through a microscope are called microorganisms or microbes.
    The study of microorganisms is known as microbiology.
    Most organisms are hardy and can be found in almost any kind of environment – hot desert, polar ice caps, salt water, marsh lands and inside other organisms.

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    • Posted by Naved Iqbal 7 years, 11 months ago

    CBSE > Class 08 > Science
    • 1 answers

    Shruti Gupta 7 years, 11 months ago

    Yes

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    • Posted by Monu Kumar 7 years, 11 months ago

    CBSE > Class 08 > Science
    • 0 answers
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    • Posted by Tarun Sutradhar 7 years, 11 months ago

    CBSE > Class 08 > Science
    • 1 answers

    Yogita Ingle 7 years, 11 months ago

    1) Artificial satellites are man made while natural satellite are formed by nature.
    2) Artificial satellites need energy for installation and to rotate around any planet while natural satellites do not require any energy for revolving.
    3) Artificial satellites move closer than the natural satellite.
    4) Moon is a natural satellite whilst telecom satellites are examples of an artificial satellite.

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    • Posted by Sahil Raj Ghosh 7 years, 11 months ago

    CBSE > Class 08 > Science
    • 1 answers

    Nehal Sukhwani 7 years, 11 months ago

    12 March 1930

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    • Posted by Sahil Raj Ghosh 7 years, 11 months ago

    CBSE > Class 08 > Science
    • 0 answers
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    • Posted by Sahil Raj Ghosh 7 years, 11 months ago

    CBSE > Class 08 > Science
    • 1 answers

    Yogita Ingle 7 years, 11 months ago

    A chromosome is a single large macromolecule of DNA, and constitutes a physically organized form of DNA in a cell. It is a very long, continuous piece of DNA (a single DNA molecule), which contains many genes, regulatory elements and other intervening nucleotide sequences while A hormone is a chemical messenger from one cell (or group of cells) to another. All multicellular organisms produce hormones .The function of hormones is to serve as a signal to the target cells; the action of hormones is determined by the pattern of secretion and the signal transduction of the receiving tissue. The best-known animal hormones are those produced by endocrine glands of vertebrate animals, but hormones are produced by nearly every organ system and tissue type in a multicellular organism.

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    • Posted by Vikas Jaiswal 7 years, 11 months ago

    CBSE > Class 08 > Science
    • 2 answers

    Yogita Ingle 7 years, 11 months ago

    A human eye is roughly a spherical ball. It consists of the following parts:

    •  Sclera: It is the outer covering, a protective tough white layer called the sclera (white part of the eye).
    • Cornea: The front transparent part of the sclera is called cornea. Light enters the eye through the cornea.
    • Iris: A dark muscular tissue and ring like structure behind the cornea are known as the iris. The color of iris actually indicates the color of the eye. Ex: A person with brown eyes have the brown iris.
    •  Pupil: A small opening in the iris is known as a pupil. Its size is controlled by the help of iris. It controls the amount of light that enters the eye.
    •  Lens: Behind the pupil, there is a transparent structure called a lens. By the action of ciliary muscles, it changes its shape to focus light on the retina. It becomes thinner to focus distant objects and becomes thicker to focus nearby objects.
    •  Retina: It is a light sensitive layer that consists of numerous nerve cells. It converts images formed by the lens into electrical impulses. These electrical impulses are then transmitted to the brain through optic nerves.

    There are two types of optic nerves:

    • Cones: Cones are the nerve cells that are more sensitive to bright light. They help in detailed central and color vision.
    • Rods: Rods are the optic nerve cells that are more sensitive to dim lights. They help in peripheral vision.

    At the junction of optic nerve and retina, there are no sensory nerve cells. So no vision is possible at that point and is known as a blind spot.

    This was a brief introduction about the human eye, its parts, and their functions.
     

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    Gurinder Buttar 7 years, 11 months ago

    When you look at an object the light from it enters your eyes through pupil the iris changes the size of the people depending on how bright the light is. The lens focusses the light onto the back of the eye: the retina. The retina is a mass of light sensitive neurones called photoreceptors which change light signals into electrical ones

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    • Posted by Rudra Prasad Pandey 7 years, 11 months ago

    CBSE > Class 08 > Science
    • 1 answers

    Riya Singh 7 years, 11 months ago

    The system by which blind persons can easily understand that what is written in the script

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    • Posted by Rohit Singh 7 years, 11 months ago

    CBSE > Class 08 > Science
    • 0 answers
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    • Posted by Vaibhav Goyal 7 years, 11 months ago

    CBSE > Class 08 > Science
    • 3 answers

    Riya Singh 7 years, 11 months ago

    The process by which we stored grains is known as Silo

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    Riya Singh 7 years, 11 months ago

    The process by which we store grain is known as sillo

    0Thank You

    Dev Ghosh 7 years, 11 months ago

    Storage of grain

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    • Posted by Chitrang Kumar 7 years, 11 months ago

    CBSE > Class 08 > Science
    • 0 answers
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    • Posted by Sunita Mendiratta 7 years, 11 months ago

    CBSE > Class 08 > Science
    • 1 answers

    Nehal Sukhwani 7 years, 11 months ago

    Birds and fish have steamlined body to reduce friction offered by fluids

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    • Posted by Deepti Mishra 7 years, 11 months ago

    CBSE > Class 08 > Science
    • 2 answers

    Nehal Sukhwani 7 years, 11 months ago

    The natural agent that stimulates sights and makes things with visible is called light.

    1Thank You

    Nehal Sukhwani 7 years, 11 months ago

    Laws of reflection are as follows- 1. The angle of incidence is always equal to the angle of reflection. 2. The incident ray, the normal at the point of incidence and the reflected ray, all lie in the same plane.

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    • Posted by Manish Raut 7 years, 11 months ago

    CBSE > Class 08 > Science
    • 0 answers
    ANSWER

    • Posted by Shruti Gupta 7 years, 11 months ago

    CBSE > Class 08 > Science
    • 1 answers

    Priya Rawat 7 years, 11 months ago

    Because certain changes like change in behaviour ,oily skin etc.occur in body at this age.

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    • Posted by Suraj Basnal 7 years, 11 months ago

    CBSE > Class 08 > Science
    • 1 answers

    Parin Hirpara 7 years, 11 months ago

    The substance which can beaten into thin sheets are called ductile

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    • Posted by Krisha Jain 7 years, 11 months ago

    CBSE > Class 08 > Science
    • 1 answers

    Nehal Sukhwani 7 years, 11 months ago

    Sclera-this is the outer Court of the eye covering the eyeball which is white and tough. It protects the interior of the eye from injuries due to accidents Cornea-the transparent front part of sclera is called cornea. It is clear like glas and has no blood vessels in it. Iris and pupil-behind the cornea, there is a dark muscular structure called Iris in it . The size of The Pupil is controlled by the Iris. The Iris is the part of eye which gives it its distinctive colour. When we say that a person has a green eye, it refers actually to the colour of the Iris. The Iris control the amount of light entering in our eyes. Lens and retina-Behind The Pupil of the eye, there is a lens which is thicker at the centre that is a convex lens. The lens focuses light at the back of the eye on a layer called retina. Retina is like a movie screen which shows the picture we see. Retina contains several Nerve cells. Sensations felt by the nerve cell are then transmittedto the Brain through the optic nerve. Optic nerve is like the cable that carries all the pictures to the brain. There are two kinds of cell in the retina- Cones - these are sensitive to bright light and sense colour. Rods- these are sensitive to dim light and sense black and white. Blindspot-at the junction of the optic nerve and the retina there are no sensory cells so no vision is possible at that spot .this is called the blind spot.

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    • Posted by Devanshu Negi 7 years, 11 months ago

    CBSE > Class 08 > Science
    • 1 answers

    Riya Singh 7 years, 11 months ago

    The food which is bad for our health and which has been spoiled.

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    • Posted by Dewasish Kumar Mahto 7 years, 11 months ago

    CBSE > Class 08 > Science
    • 1 answers

    Payal Kaushik 7 years, 11 months ago

    These are the features that help us to distinguish the male from female. Basically these refers to bodily changes during adolescence

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    • Posted by Devil Prajapati 7 years, 11 months ago

    CBSE > Class 08 > Science
    • 1 answers

    Rishabh Pandey 7 years, 11 months ago

    Female hormone are estrogen.

    2Thank You

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    • Posted by Bikash Das 7 years, 11 months ago

    CBSE > Class 08 > Science
    • 0 answers
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    • Posted by Bikash Das 7 years, 11 months ago

    CBSE > Class 08 > Science
    • 1 answers

    Nehal Sukhwani 7 years, 11 months ago

    Measures taken to reduce air pollution are- 1-improving the quality of fuels in automobiles and using catalytic converters in them. The use of CNG in automobiles has reduced air pollution in our metro cities considerably 2. Replacing wood , coal and kerosene with LPG for domestic use. 3. Using alternative source of energy like solar, wind ,thermal energy. 4. Using better technology to control the level of pollutants in the emissions

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    • Posted by Preetam Gouda 7 years, 11 months ago

    CBSE > Class 08 > Science
    • 1 answers

    Nehal Sukhwani 7 years, 11 months ago

    The gradual increase in Earth's average temperature.

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    • Posted by Swathi Krishna Kumar 7 years, 11 months ago

    CBSE > Class 08 > Science
    • 3 answers

    Piyush Jadhav 7 years, 11 months ago

    increase in carbondioxide in nature

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    Preetam Gouda 7 years, 11 months ago

    Please subscribe my channel in YouTube. Channel name is sri sumhukha

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    Preetam Gouda 7 years, 11 months ago

    The trapping of radiations by the earth's atmosphere is similar. That is why it is called the greenhouse effect

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    • Posted by Palak Kalantri 7 years, 11 months ago

    CBSE > Class 08 > Science
    • 0 answers
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    • Posted by Vishnu Mangapatla 7 years, 11 months ago

    CBSE > Class 08 > Science
    • 2 answers

    Ayushi Pathak 7 years, 11 months ago

    Species found in a particular place

    2Thank You

    Preetam Gouda 7 years, 11 months ago

    Endamic spices are small creatures

    3Thank You

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    • Posted by Priya Chabarwal 7 years, 11 months ago

    CBSE > Class 08 > Science
    • 1 answers

    Nitish Shukla 7 years, 11 months ago

    Magnet is a body which can attract any iron object. This word come from Greece

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    • Posted by Mohd Saad 7 years, 11 months ago

    CBSE > Class 08 > Science
    • 1 answers

    Riya Singh 7 years, 11 months ago

    The characteristics of an ideal fuels are given below: it should have proper ignition temperature It should have higher calorific value. It should cheaply available. It should easily transportable.

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    • Posted by Baldev Gill 7 years, 11 months ago

    CBSE > Class 08 > Science
    • 0 answers
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