CBSE > Class 08 > Science | CBSE Board | Homework Help

The sun have ultravioletrays which can cause harm to our skin and eyes so their is a protective layer of ozone in atmosphere to stop U.V. rays but now it is having hole because of use of cfc.

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Aditya Raj 7 years, 1 month ago

Parallel

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What is clonning

Posted by Kaushal Maurya 7 years, 1 month ago

CBSE > Class 08 > Science

1 answers

Prem Chandu 7 years, 1 month ago

Cloning is a method of producing the exact copy of a cell , any other living part, or a complete organism. It was found by Ian wilmut in Edinburgh in 5 July 1996. The first clone was dolly a mammal.

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What will happen if we go on cutting trees . Elaborate it

Posted by Basu Singhania 7 years, 1 month ago

CBSE > Class 08 > Science

2 answers

Siddharth Mahto 7 years, 1 month ago

If we go on cutting trees the following things can happen, Number one there can be shortage of various tree products which we get in our daily life Second there can be shortage in rainfall as the transpiration from trees are also helps in rainfall Third the air can get polluted as the the amount of Oxygen will reduce in the atmosphere as the trees give out the oxygen and take in carbon dioxide and due to the same there can be disturbance in the proper balance of atmospheric gases

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Ganishkha Mogilineedi 7 years, 1 month ago

Trees give out oxygen, even because of them we have the rains, in short they maintain the ecological balance. If we would cut trees what is going to happen is that population won't stop growing but oxygen in the atmosphere will reduce. ... They breathe in carbon dioxide and breathe out oxygen.

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Defination of comets

Posted by Ritesh Kumar 7 years, 1 month ago

CBSE > Class 08 > Science

2 answers

Aseempreet Verma 7 years, 1 month ago

And its tail is made up of cool crystals

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Swati Sovana Pattanayak 7 years, 1 month ago

An object in space that looks like a bright star with a tail and that moves around the sun.

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Zygote definition

Posted by Zen Ali 7 years, 1 month ago

CBSE > Class 08 > Science

1 answers

Ritesh Kumar 7 years, 1 month ago

During fertilization, the nuclei of the sperm and the egg fuse to form a single nucleus . This result in formation of zygote which later developinto an embryo.

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What is frictional force how it to friend and foe why it is needed if not why not

Posted by Shantanu Bhardwaj 7 years, 1 month ago

CBSE > Class 08 > Science

1 answers

Swati Sovana Pattanayak 7 years, 1 month ago

The force which always opposes the motion of one body over another body is called Frictional Friction.

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What is vacuole

Posted by Vanshika Gupta 7 years, 1 month ago

CBSE > Class 08 > Science

1 answers

Kasak Chauhan 7 years, 1 month ago

Blank looking like structure present in cells known as vacuole. It is used to store food and waste material.

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Whatare good conductors and bad conductors of electriciy.give two example each

Posted by Ruchit Jain 7 years, 1 month ago

CBSE > Class 08 > Science

1 answers

Ritesh Kumar 7 years, 1 month ago

The material which passes current through them are called good conductor . Ex-iron (all metals) . The material which does not passes current through them are called bad conductur . Ex-plastic , rubber etc.

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Short note on dry ice

Posted by Sruti Banarjee 7 years, 1 month ago

CBSE > Class 08 > Science

1 answers

Shubham Singh 7 years, 1 month ago

Dry ice is referred as common name of carbon dioxide . That does not melt when they are heated.

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What is electoplating?????

Posted by Soumya Pandey 7 years, 1 month ago

CBSE > Class 08 > Science

2 answers

Soumya Pandey 7 years, 1 month ago

Thanks????

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Aryan Gupta 7 years, 1 month ago

Electroplating is a process that uses an electric current to reduce dissolved metal cations so that they form a thin coherent metal coating on an electrode....

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What is s.e.k

Posted by Sparsh Bansal 7 years, 1 month ago

CBSE > Class 08 > Science

1 answers

Harsvardhan Gupta 7 years, 1 month ago

Swedish Krona

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Charging by Friction

Posted by Tarique Anwer 7 years, 1 month ago

CBSE > Class 08 > Science

1 answers

Ayush Saiwal 7 years, 1 month ago

This a process in which charges are produced by friction . If we rub our hands they produce charges

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Loudness

Posted by Swayam Modanwal 7 years, 1 month ago

CBSE > Class 08 > Science

4 answers

Pratham Chawla 7 years, 1 month ago

Loudnes is depend on the amplitude of the sound

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Tarique Anwer 7 years, 1 month ago

Loudness of a sound depends on the amplitude of the vibration or oscillation

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Tarique Anwer 7 years, 1 month ago

Loudness of a sound on thw amplitude of the vibration or oscillation

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Tarique Anwer 7 years, 1 month ago

Loudness of a sound depends on the amplitude of tge vibration or oscillation

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Why tsunami occur?

Posted by A.S.Akshayaa A.S.Akshayaa 7 years, 1 month ago

CBSE > Class 08 > Science

2 answers

Harsvardhan Gupta 7 years, 1 month ago

Because of earthquake

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Yogita Ingle 7 years, 1 month ago

Tsunamis are caused by sudden movements of the earth that happens under the sea. Often the most destructive Tsunamis are caused by earthquakes but causes can also include volcanic eruptions, landslides or even a comet hitting the sea.

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