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    • Posted by Ravneet Dhanda 7 years, 2 months ago

    CBSE > Class 08 > Science
    • 4 answers

    Aashu Kumar 7 years, 2 months ago

    This process of charge transfer is defined as the charge transfer using a positively charged object. Charge transfer through the process of conduction using a positively or a negatively charged object.

    3Thank You

    Ravneet Dhanda 7 years, 2 months ago

    ??

    1Thank You

    Ravneet Dhanda 7 years, 2 months ago

    Plz in short because it is in keyword and in very short questions

    1Thank You

    Yogita Ingle 7 years, 2 months ago

    When certain objects are rubbed against another object, electrons may get transferred from one object to another. If an object loses some electron, it is left with surplus number of protons. Thus, this object becomes positively charged. If an object gains electrons, it now has surplus number of electrons. Thus, this object becomes negatively charged. The transfer of charges is responsible for static electricity in various objects. Static electricity is the main reason of lightning.

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    • Posted by Ravneet Dhanda 7 years, 2 months ago

    CBSE > Class 08 > Science
    • 2 answers

    Aashu Kumar 7 years, 2 months ago

    Thunder is the sound that accompanies lightning during a thunderstorm. Sounds simple enough, but why does lightning even make a sound? ... If you’re nearby to a lightning strike, you may have heard thunder as a really loud crack, almost like the sound of a whip being cracked.Thunder is the sound caused by lightning. Depending on the distance from and nature of the lightning, it can range from a sharp, loud crack to a long, low rumble. The sudden increase in pressure and temperature from lightning produces rapid expansion of the air surrounding and within a bolt of lightning.

    3Thank You

    Yogita Ingle 7 years, 2 months ago

    The lightning is followed by a loud sound called thunder. It happens because when lightning travels through the air it heats the air and makes it to expand. The air then quickly contracts on cooling. This rapid movement of air produce the loud sound known as thunder.

    1Thank You

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    • Posted by Ravneet Dhanda 7 years, 2 months ago

    CBSE > Class 08 > Science
    • 1 answers

    Ravneet Dhanda 7 years, 2 months ago

    Plz in short because it is in keyword and in very short questions

    1Thank You

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    • Posted by Ravneet Dhanda 7 years, 2 months ago

    CBSE > Class 08 > Science
    • 2 answers

    Aashu Kumar 7 years, 2 months ago

    A tectonic plate (also called lithospheric plate) is a massive, irregularly shaped slab of solid rock, generally composed of both continental and oceanic lithosphere. Plate size can vary greatly, from a few hundred to thousands of kilometers across; the Pacific and Antarctic Plates are among the largest plate .........??????

    3Thank You

    Yogita Ingle 7 years, 2 months ago

    According to "theory of tectonic plates" ,the crust of the earth has been formed out of seven major and some minor plates.These plates were classified into convergent plates,divergent plates and transform plates.The earthquakes also occur due to the faulting of these plates only.

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    • Posted by Namrata Singh 7 years, 2 months ago

    CBSE > Class 08 > Science
    • 2 answers

    Aashu Kumar 7 years, 2 months ago

    A static force refers to a constant force applied to a stationary object. A static force is too weak to move an object because it is being countered by equally strong opposite forces. The most common example of a static force is static friction on a stationary object. If an object has some force being applied to it while it is on a surface, the force of friction will increase proportionally to the force until a certain limit. If the applied force is large enough, it can overcome the static friction and move the object. The force is then a kinetic force that is being resisted by kinetic friction.

    1Thank You

    Yogita Ingle 7 years, 2 months ago

    Frictional force that comes into action before the start of the motion of an object is called static friction.  Example: a box placed on the floor.

     

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    • Posted by Srishti Jain 7 years, 2 months ago

    CBSE > Class 08 > Science
    • 1 answers

    Meghna Thapar 5 years, 7 months ago

    Metals can be charged if sufficient electrons can be removed through friction but there will still be no localisation of charge. While in case of insulators when electrons are removed or added through friction they can't get redistributed as electrons are not free ,thus making them charged. But conductors ( like metallic rod ) can not be charged by the rubbing because the have free electrons due to the movement of these free electron in side the conductor the charge will not stay at a position hence the conductor will not attained any charge.

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    • Posted by Shivam Shivam 7 years, 2 months ago

    CBSE > Class 08 > Science
    • 5 answers

    Aashu Kumar 7 years, 2 months ago

    Fission, in biology, is the division of a single entity into two or more parts and the regeneration of those parts into separate entities resembling the original. The microrganisms experiencing fission is usually a cell, but the term may also refer to how organisms, bodies, populations, or species split into discrete parts.The fission may be binary fission, in which a single entity produces two parts, or multiple fission, in which a single entity produces multiple parts.

    1Thank You

    Rock Star 7 years, 2 months ago

    It divides into 2 and form differnt individuals.?

    2Thank You

    Rock Star 7 years, 2 months ago

    Yogita it only occurs in microorganism not in animals???????????

    3Thank You

    Rock Star 7 years, 2 months ago

    In binary fission the nuclei of a cell slowly divides into 2 . This process is called binary fission for example in amoeba.

    3Thank You

    Yogita Ingle 7 years, 2 months ago

    Binary fission is a method of asexual reproduction. In this method the body of the animal divides into two halves. The nucleus divides into two, followed by the division of the whole body. It gives rise to two individuals.  Amoeba reproduce by binary fission.

    2Thank You

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    • Posted by Kanika Vishwakarma 7 years, 2 months ago

    CBSE > Class 08 > Science
    • 1 answers

    Ammar Mansuri 7 years, 2 months ago

    Acid to produce hydrogen gas

    4Thank You

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    • Posted by Sudeesh Singam 7 years, 2 months ago

    CBSE > Class 08 > Science
    • 0 answers
    ANSWER

    • Posted by Sunidhi Chahar 7 years, 2 months ago

    CBSE > Class 08 > Science
    • 1 answers

    Yogita Ingle 7 years, 2 months ago

    The number of vibrations or oscillations made in one second is called the  frequency of vibration. The unit of frequency of vibration or oscillation of a vibrating object is hertz. When an object makes one vibration per second its frequency is said to be 1 hertz. If an object makes 10 vibrations per second , then its frequency will be 10 hertz.

    1Thank You

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    • Posted by Hiya Aggarwal 7 years, 2 months ago

    CBSE > Class 08 > Science
    • 2 answers

    Rock Star 7 years, 2 months ago

    Yogita how u know this much. Since we didnt reached on yhis chapter only

    1Thank You

    Yogita Ingle 7 years, 2 months ago

    Endoplasmic Reticulum (ER) is a complex network of tubular membranes present within the cytoplasm of the eukaryotic cell, transpiring either with a smooth surface and therefore called as the smooth endoplasmic reticulum or studded with ribosomes and hence called the rough endoplasmic reticulum which is involved in the transportation of materials. These membranes are continuous, joining with the outer membrane of the nuclear membrane . They occur in almost every type of eukaryotic cell except red blood cells and sperm cells. It has a number of jobs within the cell. Its functions are varied. Be its protein synthesis, folding, transport of cellular materials or transport of various proteins, specifically carrying them to the Golgi apparatus. It makes its presence known in all the mentioned areas.

    2Thank You

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    • Posted by Rajeev Kumar Choudhary 7 years, 2 months ago

    CBSE > Class 08 > Science
    • 1 answers

    Aashu Kumar 7 years, 2 months ago

    Raw -Reasrarch and Ananlysis Wing,,,CAMPA- Compensatory Afforestation Fund Management and Planning Authority,,,DRDO-Deffence Reasearch development organisation ,,,,,SLV--Satalite launching vechile,,,Pslv---polar satalite launching vechile

    2Thank You

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    • Posted by Umra Khan Umra 7 years, 2 months ago

    CBSE > Class 08 > Science
    • 1 answers

    Isheeka Pandey 7 years, 2 months ago

    When we pressed to the inflated balloon from two sides with hands the air in the balloon cames out with speed and pressure.

    1Thank You

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    • Posted by Sairaj Vaykul 7 years, 2 months ago

    CBSE > Class 08 > Science
    • 2 answers

    Khushi Garg 7 years, 2 months ago

    Wildlife sanctuary

    2Thank You

    Aashu Kumar 7 years, 2 months ago

    Wildlife Santuary

    3Thank You

    ANSWER

    • Posted by Shreya Yadav 7 years, 2 months ago

    CBSE > Class 08 > Science
    • 4 answers

    Vishal Nath 7 years, 2 months ago

    Refining

    1Thank You

    Aashu Kumar 7 years, 2 months ago

    Oil refinery or petroleum refinery is an industrial process plant where crude oil is transformed and refined into more useful products such as petroleum naphtha, gasoline, diesel fuel, asphalt base, heating oil, kerosene, liquefied petroleum gas, jet fuel and fuel oils. Petrochemicals feed stock like ethylene and propylene can also be produced directly by cracking crude oil without the need of using refined products of crude oil such as naphtha. Oil refineries are typically large, sprawling industrial complexes with extensive piping running throughout, carrying streams of fluids between large chemical processing units, such as distillation columns. In many ways, oil refineries use much of the technology of, and can be thought of, as types of chemical plants.

    2Thank You

    Sairaj Vaykul 7 years, 2 months ago

    REFINERY

    1Thank You

    Yash Jangid 7 years, 2 months ago

    The separation of the different constituents from petroleum is called______________

    2Thank You

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    • Posted by Harsha Jegan 7 years, 2 months ago

    CBSE > Class 08 > Science
    • 6 answers

    Rock Star 7 years, 2 months ago

    Kharif and rabi crops

    0Thank You

    Vishal Nath 7 years, 2 months ago

    Kharif and rabi crops

    0Thank You

    Aashu Kumar 7 years, 2 months ago

    Testbook Blog All Exams Study Notes Quizzes Notifications Current Affairs Static GK General Articles Crops in India – GK Notes in PDF 2 years ago . 7 Comments Agriculture plays a vital role in the Indian economy. Agriculture is the backbone of our country. It includes farming of crops, animal husbandry, pisciculture, agro-forestry etc. Over 58% of rural households primarily depend on agriculture. Agriculture along with fisheries, forestry and other allied sectors contribute around 14% to the overall GDP of our country. The particular weather and soil conditions allow for crops in India uniquely suited to it. Let us take a look at the major crops in India. Crop Seasons in India India is the top producer of many crops in the world. There can be many ways to divide the types of crops (based on area, season, economic value etc.). Based on seasons, the crops in India are divided into three types; Rabi, Kharif and Zaid. Kharif Crops Sown in June-July when rains first begin (Monsoon crop). Harvested in September-October. Requires lot of water and hot weather to grow. Example: Rice, Jowar, Bajra, Maize, Cotton, Groundnut, Jute, Sugarcane, Turmeric, Pulses (like Urad Dal) etc. Rabi Crops Sown in October-November Harvested in April-May. Requires warm climate for germination of seeds and maturation and cold climate for the growth. Example: Wheat, Oat, Gram, Pea, Barley, Potato, Tomato, Onion, Oil seeds (like Rapeseed, Sunflower, Sesame, Mustard) etc. Zaid Crops Grown between March-June between Rabi and Kharif crop seasons. Early maturing crops. Example: Cucumber, Bitter Gourd, Pumpkin, Watermelon, Muskmelon, Moong Dal etc.

    1Thank You

    Sairaj Vaykul 7 years, 2 months ago

    KHARIF CROP AND RABI CROP,?

    0Thank You

    Devanshi Varshney 7 years, 2 months ago

    Kharif and crop..... There is also another obe named Zayed crop Get it???

    2Thank You

    Harsha Jegan 7 years, 2 months ago

    Kharif and rabi

    2Thank You

    ANSWER

    • Posted by Shikha Kumari 7 years, 2 months ago

    CBSE > Class 08 > Science
    • 1 answers

    Udit Raj Lambha 7 years, 2 months ago

    B

    1Thank You

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    • Posted by Mahi Bhardwaj 7 years, 2 months ago

    CBSE > Class 08 > Science
    • 1 answers

    Tushar Kanojiya 7 years, 2 months ago

    Gdiwjvejfkgojbevhsixjjvhsjjwkwkkwjsjsnsbsvgshdhfjfjjcgngnjsjoqn fuixbw fjifnw e jags. Fjgosb t sjjwjsix fijfne gisox dihvnd gisksj f

    0Thank You

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    • Posted by Alvin Jiju 7 years, 2 months ago

    CBSE > Class 08 > Science
    • 1 answers

    Devanshi Varshney 7 years, 2 months ago

    Used in manufacturing of steel?

    1Thank You

    ANSWER

    • Posted by Sahib Singh 7 years, 2 months ago

    CBSE > Class 08 > Science
    • 2 answers

    Tushar Kanojiya 7 years, 2 months ago

    Force has two types pull and push

    0Thank You

    Richa Shree 7 years, 2 months ago

    Contact and Non contact force

    2Thank You

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    • Posted by Divyansh Sharma 7 years, 2 months ago

    CBSE > Class 08 > Science
    • 3 answers

    Sairaj Vaykul 7 years, 2 months ago

    Because Living organisms produce baby by there capecty

    2Thank You

    Richa Shree 7 years, 2 months ago

    Because only some of their eggs got fertilise. Many of them get destroyed due to water pressure or other animals eat it. So for maintaing their population they lay number of eggs.

    3Thank You

    Akshay Soni 7 years, 2 months ago

    I don't know

    2Thank You

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    • Posted by Shankar O 7 years, 2 months ago

    CBSE > Class 08 > Science
    • 1 answers

    Meghna Thapar 5 years, 7 months ago

    The most common source of CFCs are refrigerants, but fire suppression systems for aircraft and aerosols also emit CFCs into the atmosphere. Chlorofluorocarbons (CFCs) are anthropogenic compounds that have been released into the atmosphere since the 1930s in various applications such as in air-conditioning, refrigeration, blowing agents in foams, insulations and packing materials, propellants in aerosol cans, and as solvents.

    0Thank You

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    • Posted by Jai Kashyap 7 years, 2 months ago

    CBSE > Class 08 > Science
    • 2 answers

    Jai Kashyap 7 years, 2 months ago

    R u sure

    0Thank You

    Md Abdullah 7 years, 2 months ago

    84 metals+ 7 metalloids. All the metals in the periodic table…

    1Thank You

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    • Posted by Kriya Shah 7 years, 2 months ago

    CBSE > Class 08 > Science
    • 1 answers

    Md Abdullah 7 years, 2 months ago

    The Effects of Forces. A force acting on an object may cause the object to change shape, to start moving, to stop moving, to accelerate or decelerate. When two objects interact with each other they exert a force on each other, the forces are equal in size but opposite in direction.

    1Thank You

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    • Posted by Devanshi Varshney 7 years, 2 months ago

    CBSE > Class 08 > Science
    • 2 answers

    Vishal Nath 7 years, 2 months ago

    While puberty means changes which takes place at adolescence . Example sudden increase in height

    0Thank You

    Vishal Nath 7 years, 2 months ago

    Adolescence means periods in which our body undergoes changes leading to reproductive maturity

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    • Posted by Anuj Mohod 7 years, 2 months ago

    CBSE > Class 08 > Science
    • 1 answers

    Meghna Thapar 5 years, 10 months ago

    The SI unit of force is ‘newton (N). The SI unit of measuring pressure is ‘newtons per square metre’ (N/m2) which is also called Pascal.

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    • Posted by Panjwani Vishwas 7 years, 2 months ago

    CBSE > Class 08 > Science
    • 2 answers

    Vishal Nath 7 years, 2 months ago

    That is why it is called midrib

    0Thank You

    Vishal Nath 7 years, 2 months ago

    Middle line which is in the middle of a leaf that is why itnia called midrib

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    • Posted by Saeesh Waghmare 7 years, 2 months ago

    CBSE > Class 08 > Science
    • 2 answers

    Sathya Narayanan 7 years, 2 months ago

    The period in which certain changes occur in our body like we become capable of reproduction . The changes occurs between 11 to 19years.our reproductive getorgans developed

    1Thank You

    Chirag Birla 7 years, 2 months ago

    The period of life, when the body undergo changes, leading to reproductive maturity is called adolescence. The period of adolescence is normally 11 years to 19 years

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    • Posted by Ritik Raj 7 years, 2 months ago

    CBSE > Class 08 > Science
    • 1 answers

    Meghna Thapar 5 years, 7 months ago

    Light is measured by its wavelength (in nanometers) or frequency (in Hertz). One wavelength. equals the distance between two successive wave crests or troughs. Frequency (Hertz) equals the number of waves that passes a given point per second. Wavelength which is the distance between each sound wave. Frequency which is the number of times a sound wave occurs. The measure of how often a peak created by a sound wave occurs or passes a point. It is measured in hertz and is the vibration that is caused by the contact between sound waves and peaks or troughs.

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    • Posted by Ridhi Beriwal 7 years, 2 months ago

    CBSE > Class 08 > Science
    • 1 answers

    Yogita Ingle 7 years, 1 month ago

    The following are the main differences between a real image and virtual image. 
    1.A real image can be caught on a screen whereas a virtual image cannot be caught on a screen.
    2. A real image is always inverted whereas a virtual image is always erect.
    3. A real image is formed when the rays of light after reflection or refraction actually meet at some point whereas a virtual image is formed when the rays of light after reflection or refraction appear to meet at a point. 

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