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

Lightning is a natural phenomenon that occurs because of electric discharge between two or more clouds or within the cloud or between clouds and the earth. The meeting of negative and positive charges produces streaks of light and sound, which is known as lightning.

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Overgrazing leads to desertification. Why?

Posted by Jatin Dusad 2 years, 8 months ago

CBSE > Class 08 > Science

2 answers

Yash Yadav 2 years, 8 months ago

Yes because animals graze grass on a large amount of number it so destrification

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Fleming Damani 2 years, 8 months ago

Wath is agricultar

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Explain about bad and good conductors of heat and electricity

Posted by Rajvir Kaur Sohal 2 years, 8 months ago

CBSE > Class 08 > Science

1 answers

Preeti Dabral 2 years, 8 months ago

Pure silver is the best conductor of heat and electricity. Now let's see other options: Wood, air, cardboard, plastic, wool and saw dust all of them are poor conductors of heat and electricity or they can also be called as insulators. Poor conductors: Wood, air, saw-dust, cardboard, plastic and wool.

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Explane how an earthquake occurs

Posted by Vaishnavi Pariged 2 years, 8 months ago

CBSE > Class 08 > Science

2 answers

Preeti Dabral 2 years, 8 months ago

The tectonic plates are always slowly moving, but they get stuck at their edges due to friction. When the stress on the edge overcomes the friction, there is an earthquake that releases energy in waves that travel through the earth's crust and cause the shaking that we feel.

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Samar Sinha 2 years, 7 months ago

An earthquake can occur because of 4 reasons:- i) Movement of tectonic plates. ii) Volcanic eruptions. iii) Faults of the earth's crust. iv) Underground nuclear explosions. But, most of the times, earthquake gets hitted by the movement of tectonic plates. These movements have created the weak points in the earth's crust called 𝙛𝙖𝙪𝙡𝙩𝙨.

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Function of lightning conductor

Posted by Rajasree S 2 years, 8 months ago

CBSE > Class 08 > Science

1 answers

Mounika Ghosh 2 years, 8 months ago

The function of lightning conductor is to protect the building from lightning , when it strikes the conductor the current is sent to the earth through the walls of the building in the earth , the process is called earthing

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Ch 10 question anaswer

Posted by Nafey Hussain Hussain 2 years, 8 months ago

CBSE > Class 08 > Science

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What is a plane mirror

Posted by Prabhudatta Pradhan 😁 2 years, 8 months ago

CBSE > Class 08 > Science

1 answers

Preeti Dabral 2 years, 8 months ago

A plane mirror is a mirror with a flat reflective surface. For light rays striking a plane mirror, the angle of reflection equals the angle of incidence. The angle of the incidence is the angle between the incident ray and the surface normal.

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CO2 is also know as

Posted by Harsith S 2 years, 8 months ago

CBSE > Class 08 > Science

5 answers

Preeti Dabral 2 years, 8 months ago

Carbonic dioxide.

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Account Deleted 2 years, 8 months ago

Carbon dioxide

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Naman Bansal 2 years, 8 months ago

Carbondic dioxide

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Santhosh Gd 2 years, 8 months ago

Carbon dioxide

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Asit Gupta 2 years, 8 months ago

Carbon dioxide

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value of wood

Posted by Harsith S 2 years, 8 months ago

CBSE > Class 08 > Science

1 answers

Account Deleted 2 years, 8 months ago

Lower than lpg

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Who is ROBERT HOOKE ? (1635-1703 A.D)....

Posted by Shivani Rajput 2 years, 9 months ago

CBSE > Class 08 > Science

5 answers

Naman Bansal 2 years, 8 months ago

Robot Hooke is a scientist who discovered cells

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Gokul Gokul 2 years, 8 months ago

What is iris

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Harsith S 2 years, 8 months ago

He is a Scottish missinory

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Gregory Heffley 2 years, 9 months ago

Robert Hooke is a scientist who discovered cells.He first observed cells through a micrscope in a tree trunk.Hope this helps

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Shivani Rajput 2 years, 9 months ago

Born: 18 July 1635, Freshwater, United Kingdom Died: 3 March 1703, London, United Kingdom Discovered: Gamma Arietis Education: Wadham College, Westminster School, Christ Church Nationality: English Awards: Fellow of the Royal Society Academic advisors: Robert Boyle, Thomas Willis.. In 1660, Hooke discovered a physical law that would later be named after him. Hooke's law states that the force needed to extend or compress a spring is proportional to the distance it is stretched.24-Jun-2021

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What are disadvantages of CNG & LPG ??

Posted by Vanshika Bhavsar 2 years, 9 months ago

CBSE > Class 08 > Science

2 answers

Preeti Dabral 2 years, 9 months ago

In both the gases, the consumption is more as compared to liquid fuels like petrol and diesel. Moreover, extra modification of vehicles is required for the installation of CNG cylinders in the vehicles. LPG was thought to be the only clean fuel till the arrival of CNG.

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Naman Bansal 2 years, 8 months ago

Disadvantages-. In both the gases, the consumption is more as compared to liquid fuels like petrol and diesel. Moreover, extra modification of vehicles is required for the installation of CNG cylinders in the vehicles. LPG was thought to be the only clean fuel till the arrival of CNG.

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Write a short note on glands and their hormones.

Posted by Jay And Jiya Chaubal 2 years, 9 months ago

CBSE > Class 08 > Science

3 answers

Alok Yadav. 2 years, 8 months ago

1) Pituitary gland - (master gland ) - control secretion of glands 2) thyroid gland - secret thyroxin which enable to have thyroid a disease 3)

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Shubham Bharti 2 years, 9 months ago

What is amplitude

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Bhaskar Kumar 2 years, 9 months ago

Sums

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What is Microorganisms and microscope

Posted by Hifza Idrisi 2 years, 9 months ago

CBSE > Class 08 > Science

5 answers

Account Deleted 2 years, 9 months ago

A piece of equipment that makes very small objects look big enough for you to be able to see them.

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Account Deleted 2 years, 9 months ago

Microorganisms are those organisms which cannot see with our unaided eye. There are four examples of microorganisms bacteria, fungi, protoza, algae. Microorganisms are also called microbes. We can see microorganisms with the help of microscope. Microorganisms lives in any type of environment. Some harmless microorganisms helps us to clean the environment. Virus is also a microorganism but when it enters in our body., it functions like all the cell which are in our body.

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Jahangir Rassiwala 2 years, 9 months ago

Microorganisms which we cannot see with our naked eye Microscope which we can see small things

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Ansh Yadav 2 years, 9 months ago

Microorganism which you can not see naked eyes Micro =small Orangism=living things Microscope which you can see small thing

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Ankit Singh 2 years, 9 months ago

(MY-kroh-OR-guh-NIH-zum) An organism that can be seen only through a microscope. Microorganisms include bacteria, protozoa, algae, and fungi. Although viruses are not considered living organisms, they are sometimes classified as microorganisms.

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List three conditions for the growth of fungi

Posted by Jatin Choudhary 2 years, 9 months ago

CBSE > Class 08 > Science

2 answers

Preeti Dabral 2 years, 9 months ago

In addition to humidity and water, fungi need adequate nutrition and temperatures to grow. The availability of nutrients depends on the composition of the building material. Building materials like wood and ceiling tiles are organic in nature; they contain complex polymers like starch, cellulose and lignin.

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Bivasha Bashumatary 2 years, 9 months ago

What is agriculture

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How does and embryo form

Posted by Aditxya Yadav 2 years, 9 months ago

CBSE > Class 08 > Science

1 answers

Preeti Dabral 2 years, 9 months ago

During fertilization, the sperm and egg unite in one of the fallopian tubes to form a zygote. Then the zygote travels down the fallopian tube, where it becomes a morula. Once it reaches the uterus, the morula becomes a blastocyst. The blastocyst then burrows into the uterine lining — a process called implantation.

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What is conservation of forest and wildlife

Posted by Priyanshi Kumari 2 years, 9 months ago

CBSE > Class 08 > Science

3 answers

Priyanshi Kumari 2 years, 9 months ago

Name any two groups of people that fall into the category of the marginalised section of society

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Sampoorna Dhanorkar 2 years, 9 months ago

Madarchot

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Account Deleted 2 years, 9 months ago

Wildlife conservation refers to the practice of protecting wild species and their habitats in order to maintain healthy wildlife species or populations and to restore, protect or enhance natural ecosystems.

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Define each of the following - Adolescence Puberty Adams Apple Secondary Sexual Characters

Posted by Swapnamayee Satapathy 2 years, 9 months ago

CBSE > Class 08 > Science

1 answers

Account Deleted 2 years, 9 months ago

) Adam's apple: The protruding part in the throat is called Adam's apple. It is the enlarged voice box or larynx. It makes the voice of boys coarse. (b) Secondary sexual characters: The characters which help to distinguish the male from female are called secondary sexual characters.

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