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The process is known as carboniasation form by carbon dioxide Coal is mainly carbon on heating produces mainly carbondioxide gas and a lot of heat energy

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Vinod Swami 5 years, 11 months ago

The process is known as canonisation because it is made from process of carbon dioxide

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Priyamani Priyamani Raja 5 years, 11 months ago

About 300 million years ago the earth had dense forest in low lying wetland areas . Due to natural processes,like flooding,these forest got buried under the soil . Under high pressure and high temperature dead plants got slowly convected to coal . This process is called carbonisation

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Yogita Ingle 5 years, 11 months ago

Coal was formed by the decomposition of large land plants and trees buried under the Earth about 300 million years ago.

About 300 million years ago, the Earth had dense forests in the low lying wet areas.

Due to natural calamities like earthquakes, volcanoes, floods, etc. these forests got buried under the surface of the Earth.

As more soil got deposited on them, they were compressed.

As a result, the temperature also rose as they sank deeper and deeper.

Due to high pressure and temperature and the absence of air, the wood of the buried forest plants and trees slowly got converted into coal.

The slow process by which the dead plants buried under the Earth have become coal is called as carbonisation.

Since coal was formed from the remains of the plants, it is called a fossil fuel.

Coal, which is mainly carbon, on heating produces mainly carbon dioxide gas and a lot of heat energy.

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How to change the speed and the diarection of a moving body ?

Posted by Madhav Bharadiya 5 years, 11 months ago

CBSE > Class 08 > Science

2 answers

Preethisanjana Preethisanjana 5 years, 11 months ago

Forces effect

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Gaurav Seth 5 years, 11 months ago

Forces affect how objects move. They may cause motion; they may also slow, stop, or change the direction of motion of an object that is already moving. Since force cause changes in the speed or direction of an object, we can say that forces cause changes in velocity. Remember that acceleration is a change in velocity.

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Explain how cell in a living organisms is known as the basic structural unit ?

Posted by Riya Kumar 5 years, 11 months ago

CBSE > Class 08 > Science

2 answers

Shivani Arora 5 years, 11 months ago

As we know that cell is the smallest and basic unit of life and capable for all living functions. Cell are building blocks of life that is the only reason

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Sameer Arora 5 years, 11 months ago

A body of living organisms has basis structural unit such as cell . Cells are of different sizes,shapes and group together to form organ,organ system Similar functions are in multicellular organisms are carried out by group of specialized cells which are organized into tissues and organ such as the higher plants and animals.hence,cell is known as basis structural and functional unit of life

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What do you mean by seed dril

Posted by Om Pawar 5 years, 11 months ago

CBSE > Class 08 > Science

4 answers

Preethisanjana Preethisanjana 5 years, 11 months ago

It is the method of sowing seeds

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Aditya Narayan Singh 5 years, 11 months ago

The seed drill is used for sowing with the help of tractors.This sows the seeds uniformly at equal distance and depth.

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Riya Kumar 5 years, 11 months ago

Seed drill is a machine ised to sow seeds and avoid overcrowding of plants as it sows seeds at constant distances

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Vivek S B 5 years, 11 months ago

It is moderñ method for sowing seeds

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What is CNG?

Posted by Jijnasha Mohanty 5 years, 11 months ago

CBSE > Class 08 > Science

4 answers

Preethisanjana Preethisanjana 5 years, 11 months ago

Cng means comprest natural gas

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Aditya Narayan Singh 5 years, 11 months ago

CNG is stands for Compressed Natural Gas.CNG is used for power generation. It is now being used as a fuel for transport vehicles because it is less polluting.It is a clener fuel.CNG is a ideal fuel because when CNG burns it produces very small amount of harmful products.Therefore,the use of CNG has reduced air pollution in our city.

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Riya Kumar 5 years, 11 months ago

CNG stands for (compressed natural gas) it is used in cars and many other vehicles to avoid a larger amount of pollution

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Gaurav Seth 5 years, 11 months ago

CNG which stands for compressed natural gas is mainly composed of Methane

It produces very little greenhouse gases

Its primary use is as an alternative for fuel in automobiles.

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Why is the shape of R.B.Cs is spherical or biconcave?

Posted by Mehak Jain 5 years, 11 months ago

CBSE > Class 08 > Science

1 answers

Yogita Ingle 5 years, 11 months ago

A red blood cell has what is known as a biconcave shape. They have obtained this shape because they lack nucleus. A fully mature RBC does not have its own nucleus. Hence its oxygen carrying capacity increases since it does not utilize to itself. Its shape also allows it to ''squeeze'' through narrow vessels and can enter even the thinnest capillaries around the body.

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What is large hadron collider

Posted by Sita Anchal 5 years, 11 months ago

CBSE > Class 08 > Science

1 answers

Sia ? 5 years, 11 months ago

The Large Hadron Collider (LHC) is the world's largest and most powerful particle collider and the largest machine in the world. It was built by the European Organization for Nuclear Research (CERN) between 1998 and 2008 in collaboration with over 10,000 scientists and hundreds of universities and laboratories, as well as more than 100 countries. It lies in a tunnel 27 kilometres (17 mi) in circumference and as deep as 175 metres (574 ft) beneath the France–Switzerland border near Geneva.

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All cells are same size and shape. True or false?

Posted by Srilekha Gangopadhyay 5 years, 11 months ago

CBSE > Class 08 > Science

6 answers

Vinod Swami 5 years, 11 months ago

False

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Aditya Narayan Singh 5 years, 11 months ago

False.

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Renu Sahu 5 years, 11 months ago

False

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Mehak Jain 5 years, 11 months ago

False

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Ananya Ps 5 years, 11 months ago

False

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Pranjal Srivastava 5 years, 11 months ago

I think false

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What is the meaning of pvc

Posted by Rahul Das 5 years, 11 months ago

CBSE > Class 08 > Science

2 answers

Aditya Narayan Singh 5 years, 11 months ago

PVC is stands for Polyvinyl Chloride. It is an example of thermoplastics.

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Pranjal Srivastava 5 years, 11 months ago

Pvc is a thermoplastic it's full is Polyvinyl chloride

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Why phosphorus and sulphur burns at room temperature? Explain to store phosphorus and sulphur

Posted by Ayush Nayak 5 years, 11 months ago

CBSE > Class 08 > Science

1 answers

Meghna Thapar 5 years, 7 months ago

Phosphorous and sulphur burns at room temperature with the air present in the atmosphere so they are not kept exposed in air They are stored in air tight containers.

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3. what is organ system 4. what is tissue 5. What is significance of cell wall in a plant cell 6. Which is the power house of cells

Posted by Priyamani Priyamani Raja 5 years, 11 months ago

CBSE > Class 08 > Science

2 answers

Kritika Singh 5 years, 11 months ago

# *organ* *system*. : A systematic way in which our organ works to perform several functions for what it is meant for.it is made up of organs # * tissue*,: it is the group of cell which performs same function s

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Prince Kabra 5 years, 11 months ago

Ggjhcyhvvgvcxssr5tt555yy7uuuhhgccdzdtyu

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2. What is organs

Posted by Priyamani Priyamani Raja 5 years, 11 months ago

CBSE > Class 08 > Science

1 answers

Diksha Sharma 5 years, 11 months ago

Group of tissues

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1.what is body organisation of complex organisms

Posted by Priyamani Priyamani Raja 5 years, 11 months ago

CBSE > Class 08 > Science

1 answers

Meghna Thapar 5 years, 7 months ago

Complex organisms, such as human beings, animals, and plants, are much bigger in size and complex in structure and functions compared to a simple unicellular organism such as a bacterium. In the case of unicellular organisms, the transport of material to and from the environment can take place through the cell membrane. The cell, in case of unicellular organisms, is in direct contact with the environment and can exchange material easily as a result. In comparison, the complex organisms have a very large number of cells distributed throughout their body. Since they are away from the environment, it is very difficult for them to exchange anything with the environment. As a result, complex organisms need elaborate transport mechanisms consisting of organs (which are made up of tissues), tissues (which are made up of cells), and cells. This way, they ensure the cells receive nutrients and can get rid of wastes, in order to survive and function properly.

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how to insert sperm into ovam

Posted by Shashank Jha 5 years, 5 months ago

CBSE > Class 08 > Science

1 answers

Pranjal Srivastava 5 years, 5 months ago

Do u want how to do s. e. x. Do do susu into female private part inside

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What happen when an electric charge passage between a narrow gap in the air

Posted by Pramod Kr Pramod Kr 5 years, 11 months ago

CBSE > Class 08 > Science

3 answers

Krishna Moni Das 5 years, 11 months ago

The second answer is wrong

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Krishna Moni Das 5 years, 11 months ago

When high voltage is applied to the gap, a spark forms across the bottom of the wires where they are nearest each other, rapidly changing to an electric arc. Air breaks down at about 30 kV/cm, depending on humidity, temperature, etc.

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Krishna Moni Das 5 years, 11 months ago

Hydrogen is a chemical element with the symbol H and atomic number 1. With just one proton and one electron, it is the most common element, making up 75% of the mass of the entire universe. ... Rather, when hydrogen burns, it reacts with the oxygen in the air to create heat. This heat is then used for energy.

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Difference between hoe and cultivator

Posted by Bimal Pillai 5 years, 11 months ago

CBSE > Class 08 > Science

1 answers

Karthi Keyan 5 years, 11 months ago

Hoe is a simple to used to cut weeds Cultivator is a machine to cultivate crops

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What is a magnet

Posted by Ansh Tiwari 5 years, 11 months ago

CBSE > Class 08 > Science

3 answers

Krishna Moni Das 5 years, 11 months ago

a piece of iron or other material which has its component atoms so ordered that the material exhibits properties of magnetism, such as attracting other iron-containing objects or aligning itself in an external magnetic field.

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Neena Arora 5 years, 11 months ago

A substance which can attract unlike poles and repel the like poles

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Mohit Mayank 5 years, 11 months ago

Substance which have property of attracting small pieces of iron , nickel ,cobalt, etc are called magnets and this property is called magnetism.

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What is hydrogen

Posted by Sneha Singh 5 years, 11 months ago

CBSE > Class 08 > Science

4 answers

Sidh Kataria 5 years, 11 months ago

Hydrogen means hydro means water and gen means gass

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Indhu Mathi 5 years, 11 months ago

Hydrogen is chemical element

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Krishna Moni Das 5 years, 11 months ago

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???Mansu ??? ?Raj? 5 years, 11 months ago

Hydrogen is a chemical element with the symbol H and atomic number 1. With just one proton and one electron, it is the most common element, making up 75% of the mass of the entire universe. ... Hydrogen gas is colourless, odourless, tasteless and non-toxic.

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What is subatomic particles

Posted by Sita Anchal 5 years, 11 months ago

CBSE > Class 08 > Science

2 answers

???Mansu ??? ?Raj? 5 years, 11 months ago

The three main subatomic particles that form an atom are protons, neutrons, and electrons. The center of the atom is called the nucleus. First, let's learn a bit about protons and neutrons, and then we will talk about electrons a little later. Protons and neutrons make up the nucleus of an atom.

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???Mansu ??? ?Raj? 5 years, 11 months ago

A subatomic particle is a unit of matter or energy that's the fundamental makeup of all matter. According to modern atomic theory, an atom has a nucleus, which is its center, or core. The nucleus contains subatomic particles: protons and neutrons. Protons are positively-charged particles

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Define Atmospheric pressure ?

Posted by Abhijeet Sawant 5 years, 11 months ago

CBSE > Class 08 > Science

5 answers

Prabhat Kumar 5 years, 11 months ago

The pressure exerted by the atmosphere ( gases) is known as atmospheric pressure.

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Laxmi Sojitra 5 years, 11 months ago

The pressure exerted by this air is known as atmospheric pressure.

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Ansh Tiwari 5 years, 11 months ago

The pressure exerted by the atmosphere is called atmospheric pressure.

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Sita Anchal 5 years, 11 months ago

The pressure exerted by this air is known as atmospheric pressure

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Yogita Ingle 5 years, 11 months ago

Atmospheric pressure is defined as the force per unit area exerted against a surface by the weight of the air above that surface.
Unit of atmospheric pressure is the standard atmosphere (atm)
atm is a unit of pressure defined as 101325 Pa or 1.01325 bar which is equivalent to 760 mmHg

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How can you charge a neutral object

Posted by Anil Singh 5 years, 11 months ago

CBSE > Class 08 > Science

1 answers

???Mansu ??? ?Raj? 5 years, 11 months ago

You can charge it positively by rubbing on a silky object for some time. After than it will get charged. But sorry friend I don't know how to charge negatively. Ok byy...

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What do you mean by fermentation and germentation

Posted by Siji Theganal 5 years, 11 months ago

CBSE > Class 08 > Science

2 answers

Neena Arora 5 years, 11 months ago

The enzymatic break down of large organic molecules into smaller molecules is called fermentation.

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Sita Anchal 5 years, 11 months ago

The process of conversion of sugar into alcohol is called fermentation

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Name the microorganism of rust of wheat

Posted by Madhvesh Madhvesh 5 years, 11 months ago

CBSE > Class 08 > Science

5 answers

Laxmi Sojitra 5 years, 11 months ago

Fungi

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Neena Arora 5 years, 11 months ago

Fungi

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Sneha Singh 5 years, 11 months ago

What is hydrogen

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Sita Anchal 5 years, 11 months ago

Fungi

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Madhan T 5 years, 11 months ago

Fungi

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What do you mean by photosynthesis?

Posted by Jijnasha Mohanty 5 years, 11 months ago

CBSE > Class 08 > Science

1 answers

Yogita Ingle 5 years, 11 months ago

Photosynthesis is a biochemical process by which phototrophs use sunlight to synthesize nutrients from carbon dioxide and water.
The chemical energy produced during photosynthesis process is glucose. It is used to carry out all cellular activities. Moreover, oxygen is released as a by-product of photosynthesis.

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Differentiate between mtal and non metal

Posted by Sonu Singh 5 years, 11 months ago

CBSE > Class 08 > Science

1 answers

Sia ? 5 years, 11 months ago

Differences between metal and a non-metal on the basis of chemical properties.

Metals	Non-metals
1) They form basic oxides.	1) They form acidic or neutral oxides.
2) They displace hydrogen from dilute acids.	2) They don't displace hydrogen from dilute acids.
3) Usually they don't combine with hydrogen. Only a few reactive metals combine with hydrogen to form metal hydroxide which are electrovalent compounds.	3) They react with hydrogen to form hydrides which are covalent compounds.
4) They form chlorides which are electrovalent compounds.	4) They react with chlorine to form chlorides which are covalent compounds.
5) Metals react with water to produce metal oxide (or metal hydroxide) and hydrogen gas.	5) Non-metals do not react with water.

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Differentiate between metal non metal

Posted by Sonu Singh 5 years, 11 months ago

CBSE > Class 08 > Science

1 answers

Mehak Jain 5 years, 11 months ago

Metal ae malleable and ductile Non metal aren't malleable and ductile

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What is chromosomr

Posted by Sourav Kumar 5 years, 11 months ago

CBSE > Class 08 > Science

3 answers

Anusha Pattnaik 5 years, 11 months ago

we can see a small spherical body in the nucleus it is called the nucleus in addition nucleus contains contains thread like structure structures cal chromosomes

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Neena Arora 5 years, 11 months ago

Chromosomes are the thread like structures which contains deoxyribonucleic acid (DNA) . They contain basic hereditary units called genes. Genes are responsible for passing genetic characters from parents to offsprings.

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Yogita Ingle 5 years, 11 months ago

A chromosome is an organized structure of DNA and protein found in the nucleus of cells. It is a single piece of coiled DNA containing many genes. These are considered to be the vehicles of heredity as they carry genes.

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TRUE OR FALSE. IF IT IS FALSE STATE THE REASON. Every square cm of our body experiences a force equal to the weight of 1kg due to atmospheric pressure.

Posted by Reshmi Vinod 5 years, 11 months ago

CBSE > Class 08 > Science