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Nitish Rathor 8 years, 5 months ago

Conversion of fertile land into deserts due to removal of fertile topsoil and scarcity of water is called desertification

Amit Yadav 8 years, 5 months ago

the process by which fertile land becomes desert

 

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Anirudh A 8 years, 5 months ago

Flora means plants that see in a particular area Fauna means animals that see in a particular area

Aishwarya Palani 8 years, 5 months ago

Flora means plants and fauna means animals
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Sarthak Dixit 8 years, 5 months ago

Any fibre which is made up of Chemical Substance s or Man Made

Aishwarya Palani 8 years, 5 months ago

The fibre which is made from chemicals is called synthetic fibre
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Dhananjay Das 8 years, 5 months ago

The same kind of plant that are grown in large quantity on same field is known as crop

Bhavesh Verma 8 years, 5 months ago

The plant grown on a large field for agriculture purpose is known as a crop
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Raveesh Yadav 8 years, 5 months ago

Because it occupies the intermolecular space present in water molecules.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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Vineeta Sharma 8 years, 5 months ago

Coal is a fossil fuel.it is black in colour. Found in deep coal mines under the surface of earth in the form of coal beds

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Bhavesh Verma 8 years, 5 months ago

The word science is driving from sienta mean to know
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Parth Khatri 8 years, 5 months ago

The organisms which are microscopic i.e., can't be seen without naked eyes are called microorganisms.
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Mayra Sardana 8 years, 5 months ago

The process of burning of a substance in the presence of air (oxygen)to provide heat and light is called combustion
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Dr Pathikrt Banerjee 8 years, 5 months ago

i) Removing weeds

ii) Helps in loosening of soil

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Arpita Banerjee 8 years, 5 months ago

A light-year is a unit of distance. It is the distance that light can travel in one year. Light moves at a velocity of about 300,000 kilometers (km) each second. So,in one year, it can travel about 10 trillion km. More precisely, one light-year is equal to 1 light-year  = 9460730472580800 metres (exactly)

Or, 1 light year =9.4605284 ×1015 meters = 9.4607 × 1012 km (nearly 6 million million miles).

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Aditya Gautam 8 years, 5 months ago

Secularism in India means equal treatment of all religions by the state. With the 42nd Amendment of the Constitution of India enacted in 1976, the Preamble to the Constitution asserted that India is a secular nation. However, neither India's constitution nor its laws define the relationship between religion and state.
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Sami Kaswa 8 years, 5 months ago

Brain is protected from a hard covering of bones known as skull.
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Sia ? 4 years, 7 months ago

Sl. No. Differentiating Property Mass Weight
1 Definition
  • Mass is simply the measure of the amount of matter in a body.
  • Weight is the measure of the amount of force acting on a mass due to acceleration due to gravity.
2 Denotation
  • Mass is denoted by “M”.
  • Weight is denoted by “W”.
3 Formula
  • Mass is always constant for a body and there are several formulas to calculate mass.
  • One way to calculate mass is:

Mass = volume × density

  • Weight is the measure of the gravitational force acting on a body.
  • Weight can be calculated from the following formula:

Weight = mass × acceleration due to gravity

4 Quantity Type
  • Mass is a base quantity.
  • Mass only has magnitude and so, it is a scalar quantity.
  • Weight is a derived quantity.
  • Weight has both magnitude and direction (towards the centre of gravity) and so, it is a vector quantity.
5 Unit of Measurement
  • The SI unit of mass is Kilogram (Kg).
  • The SI unit of weight is Newton (N).
6 Gravitational Effect
  • Mass does not depend upon gravity and is constant everywhere.
  • Mass can never be zero.
  • Weight is dependent on gravity and so, it varies from place to place.
  • Weight can be zero where there is no gravity (like space).
7 Measuring Instrument
  • Mass can be easily measured using any ordinary balance like beam balance, lever balance, pan balance, etc.
  • Weight can be measured by a spring balance or by using its formula.
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Gurjeet Singh 8 years, 5 months ago

When a copper vessel is exposed to moist air for long, copper reacts with moist carbon dioxide in the air and slowly loses its shiny brown surface and gains a green coat. This green coating is a mixture of copper carbonate and copper hydroxide

2Cu(s) + CO2(g) + +O2 + H2O{tex}\,\rightarrow\,{/tex}CuCO3 + Cu(OH)2

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Samreet Kaur 8 years, 5 months ago

When a combustible substance catches fire even at room temperature,spontaneous combustion takes place.

Gurjeet Singh 8 years, 5 months ago

The type of combustion in which a material suddenly bursts into flames, without the application of any apparent cause is called spontaneous combustion.

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