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If an electric current is passed through potato and electric current is passed through it for some time then it would be observed there is coloured spot on the potato around one wire and no such spot around the other wire. a) State the colour of the spot b) Around which electrode the coloured spot is formed ? c) Which effect of electric current is involved in this case ?

Posted by Ananya Agrawal 4 years ago

CBSE > Class 08 > Science

1 answers

Numaish Meena 4 years ago

When electric current is passed through potato chemical reaction takes place inside potato. Copper and zinc is connected with potato which acts as electrode. ... Due to formation of copper ions, there is formation of greenish blue spot around copper (positive) electrode

ANSWER

Write down the disease caused by microorganisms in human beings and their mode of transmission

Posted by Sanjana Dangari 4 years ago

CBSE > Class 08 > Science

2 answers

Kamakshi Malhotra 4 years ago

Tuberculosis Bacteria Air Measles Virus Air Chicken Pox Virus Air Polio Virus Air/Water Cholera Bacteria Water Typhoid Bacteria Water Hepatitis A Virus Water Malaria Protozoa Mosquito

Kamakshi Malhotra 4 years ago

Human Disease Microorganisms Mode of Transmission

ANSWER

Write down the medicinal uses of microorganism?

Posted by Sanjana Dangari 4 years ago

CBSE > Class 08 > Science

2 answers

Manogna G S 3 years, 11 months ago

Penicillin etc

Kajal Sahu 4 years ago

Hi

ANSWER

Introduction of synthetic fibres in the textile industry brought revolutionary change across the world. How do you appreciate this?

Posted by Harshitha Vadlamudi 4 years ago

CBSE > Class 08 > Science

0 answers

ANSWER

What do you mean by diffused reflection is it violating laws of reflection ?

Posted by Shakti Prasad Singh 4 years ago

CBSE > Class 08 > Science

0 answers

ANSWER

Female reproductive organs diagram

Posted by Bharat Singhal 4 years ago

CBSE > Class 08 > Science

0 answers

ANSWER

Dose pure water conduct electricity ?If not, what can we do to make it conducting

Posted by Hui Yamuk 4 years ago

CBSE > Class 08 > Science

2 answers

Harmandeep Singh 3 years, 11 months ago

Pure water does not conduct electricity because it doesn't contain salts in it. To make it conducting, we add a small amount of common salt since salt solutions are good conductors of Electricity

Muthyala Chandra 4 years ago

Pure water or distilled water does not conduct electricity because it doesn't contain salts in it. To make it conducting, we add a pinch of common salt since salt solutions are good conductors of electricity

ANSWER

Sextual

Posted by Shrish Navkar 4 years ago

CBSE > Class 08 > Science

2 answers

Gurmeet Singh 4 years ago

Means

Aadarsh Singh 4 years ago

Sexual no sextual

ANSWER

Define ignition temperature for fuel

Posted by Ananya Agrawal 4 years ago

CBSE > Class 08 > Science

3 answers

Manogna G S 3 years, 11 months ago

The lowest temperature that a Object takes Fire is called ignition temperature.

Praveen Deidanka 4 years ago

The temperature at which a particular substance catch fire in the percent of air is called its ignition temperature

Praveen Deidanka 4 years ago

The temperature at which a particular substance catch fire in the presence of air is called its ignition temperature

ANSWER

In which cell cell wall is found

Posted by Haneesh Patel 4 years ago

CBSE > Class 08 > Science

2 answers

Manogna G S 3 years, 11 months ago

In Plant cell and bacterial cell.

Ananya Agrawal 4 years ago

Plant cell

ANSWER

Curd contains several**********

Posted by Praveen Deidanka 4 years ago

CBSE > Class 08 > Science

5 answers

Manogna G S 3 years, 11 months ago

Microorganisms .. Lactobacillus

Krishna Chaudhary 3 years, 11 months ago

Bacteriam lactobacillus

Praveen Deidanka 4 years ago

Bacterium lactobacillus

Ananya Agrawal 4 years ago

Lactobacillus bacteria

Praveen Deidanka 4 years ago

Bacterium lactobacillus

ANSWER

All virus are**********

Posted by Praveen Deidanka 4 years ago

CBSE > Class 08 > Science

3 answers

Ananya Agrawal 4 years ago

Parasites

Praveen Deidanka 4 years ago

Parasites

Praveen Deidanka 4 years ago

Parasites

ANSWER

Microorganism are also known as**********

Posted by Praveen Deidanka 4 years ago

CBSE > Class 08 > Science

4 answers

Manogna G S 3 years, 11 months ago

Microbes

Navaneethan Navaneethan 4 years ago

Animals

Ananya Agrawal 4 years ago

Microbes

Praveen Deidanka 4 years ago

Microbes

ANSWER

Describe the menstrual cycle in females

Posted by Vinayak Upadhyay 4 years ago

CBSE > Class 08 > Science

2 answers

Shreya Dhar 4 years ago

The cycle of producing and releasing a mature egg, the thickening of the uterus wall, and it's shedding if fertilization does not occur is known as the menstrual cycle. The menstrual cycle is controlled by hormones.

Ananya Agrawal 4 years ago

From ovary every 28 to 30 days one matured ovum /egg is released, during this period the uterine wall in female prepares itself to receive the developing fertilised egg. In case there is no fertilisation, the thickened lining of uterine wall breaks down and goes out of the body along with the blood.This is called menstruation.

ANSWER

Insulin hormone secretion by

Posted by Purusottam Sethy 4 years ago

CBSE > Class 08 > Science

4 answers

Manogna G S 3 years, 11 months ago

Pancreas

Tanmay Sharma 4 years ago

Pancreas

Ananya Garg 4 years ago

Pancreas even they secrete glucagon

Shubhangi Mishra 4 years ago

Pancreas

ANSWER

Define circuit

Posted by Tejas Aradhya 4 years ago

CBSE > Class 08 > Science

3 answers

Bhawna Kumari 4 years ago

Two terminal of bulbs called circuit

Abhishek Kashyap 4 years ago

What is lighte

Paras Sumer Singh 4 years ago

Circular journey

ANSWER

Define lighting ?????????¿

Posted by Bhanu Kashyap 4 years ago

CBSE > Class 08 > Science

2 answers

Paras Sumer Singh 4 years ago

Light is a form of energy

Yash Singh 4 years ago

Light is a form of energy

ANSWER

Endocrine and exocrine

Posted by Anuska Pattnayak 4 years ago

CBSE > Class 08 > Science

3 answers

Jesalini M.J 3 years, 11 months ago

Endocrine - hormone producing glands

Ananya Garg 4 years ago

Endocrine are ductless glands but Exocrine has ducts that mean pipe

Bhawna Kumari 4 years ago

Wo enclorine hoga

ANSWER

Explain adolescence

Posted by Khushee Sethiya 4 years ago

CBSE > Class 08 > Science

5 answers

Vinayak Upadhyay 4 years ago

Adolescence is a period in between 13 to 19. It is also known as teenage period. In this period the body growth of girls and boys occurs rapidly . Some changes during adolescence are Menstrual cycle in females Acne, pimples Hair growth in underarms, pubic region Size Health Height Weight etc. Are some of the changes occured during adolescence or teenage. The girl or boy in teenage are known as teenager.

Bhawna Kumari 4 years ago

The period of life,when the body under goes change leading of reproductive maturity is called adolescence.

Sarshini Mohan 4 years ago

Growing up is a natural process. The period of life, when the body undergoes changes, leading to reproductive maturity, is called adolescence. Adolescence begins around the age of 11 and lasts upto 18 or 19 years of age. Since this period covers the ‘teens’ (13 to 18 or 19 years of age), adolescents are also called ‘teenagers’. In girls, adolescence may begin a year or two earlier than in boys. Also, the period of person to person.

Ananya Sharma 4 years ago

Adolescence is a transitional stage of physical and psychological development that generally occurs during the period from puberty to legal adulthood. Adolescence is usually associated with the teenage years, but its physical, psychological or cultural expressions may begin earlier and end later.

Khushee Sethiya 4 years ago

Explain adolescence

ANSWER

Hey all u can ask any questions

Posted by Chhavi Chaudhary 4 years ago

CBSE > Class 08 > Science

0 answers

ANSWER

Write the structure of electroscope and explain how it is working?

Posted by Shakti Prasad Singh 4 years ago

CBSE > Class 08 > Science

0 answers

ANSWER

Anyone knows kannada

Posted by Varshini H. J. 4 years ago

CBSE > Class 08 > Science

0 answers

ANSWER

Why do different substance produce different flame colours?

Posted by Lakshya Garg 4 years ago

CBSE > Class 08 > Science

1 answers

Kanu Choudhary 4 years ago

Because the colour of the depends upon the temperature of the flame and nature of the substance burning

ANSWER

What would happen if animal have cell wall

Posted by Mahi Dahlan 4 years ago

CBSE > Class 08 > Science

1 answers

Ananya Agrawal 4 years ago

If animal cell will have cell wall, it would not be able to do any of the usual activities like run, eat etc....

ANSWER

Two astronaut are floating close to each other in space Can they talk to each other with out using any special device ? Give reason

Posted by Aman Yadav 4 years ago

CBSE > Class 08 > Science

3 answers

Kanu Choudhary 4 years ago

No in space sound does not travel

Priyanshi Deswal 4 years ago

No, they can not talk in space because sound need medium to travel and in space there is vacuum

Sia ? 4 years ago

We know that sound waves are longitudinal waves. Longitudinal waves need a medium to travel. Longitudinal waves are transported through particles. For sound waves, they travel through compression and rarefaction. They travel through different sequences of waves of pressure through a compressible media. Sounds can propagate through different media of solid, liquid and gas. Sound waves travel by vibrations of molecules. In fact, when sound travels through different types of media, its speed changes. When sound travels in solid, its speed is more when comparing the speed of sound with respect to liquid and gas.
This is because the density of solids is more; hence the molecules are nearer to each other. Because the molecules are nearer, they collide with each other more frequently; hence the numbers of vibrations are more, so the sound travels faster in denser substances. Thus the speed of sound in air is slower as compared to solids and liquids.

ANSWER

What is mineral

Posted by Pushpit Raj 4 years ago

CBSE > Class 08 > Science

2 answers

Jesse Trina ? 4 years ago

A mineral is a natural substance of organic or inorganic origin with definite chemical and physical properties.

Rawan Ji 4 years ago

A naturally occurring substance that has a definite chemical composition is a mineral.

ANSWER

Explain the term cloning

Posted by Devesh Ochani 4 years ago

CBSE > Class 08 > Science

5 answers

Ananya Agrawal 4 years ago

The individual which are morphologically and genetically similar to one another as well as their parents, are called clones.

Kriti Lalotra 4 years ago

Production of exact copy of a cell

Vinayak Upadhyay 4 years ago

Actually cloning is removed from my syllabus so I can not explain you my dear ??

Jesse Trina ? 4 years ago

The production of an exact copy of a cell, a part of the animal or the complete animal through asexual reproduction is called cloning.

Fatima Rahman❣️❣️ 4 years ago

Cloning is the process of generating a genetically identical copy of a cell or an organism. Cloning happens all the time in nature.

ANSWER

Rock shelters are found inside ----

Posted by Mêľîśá Ãñńä 4 years ago

CBSE > Class 08 > Science

2 answers

Sia ? 4 years ago

Rock shelters are found inside the Satpura National Park. These are the prehistoric evidences of human life in these jungles, which give us an idea about the life of primitive humans.

Jesse Trina ? 4 years ago

Satpura National Park

ANSWER

What is carbonisation. The one who will answer first will get points.

Posted by Piyush Kurrey 4 years ago

CBSE > Class 08 > Science

2 answers

Manogna G S 3 years, 11 months ago

The the process converting wood into a Coal is called carbonization

Soumya Gagneja 4 years ago

The process of conversion of dead plant remains into coal is called carbonisation

ANSWER

Suppose, we want to make a zinc coating on a spoon. Draw and explain how the coating will be take place?

Posted by Shakti Prasad Singh 4 years ago

CBSE > Class 08 > Science

1 answers

Soumya Gagneja 4 years ago

It will take place using electroplating.

ANSWER

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