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What is a black hole?

Posted by Yahiah Rahman 5 years, 4 months ago

CBSE > Class 08 > Science

2 answers

Vedant Kashyap 5 years, 4 months ago

A hole which is black is called black hole

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Yahiah Rahman 5 years, 4 months ago

A black hole is a region of spacetime where gravity is so strong that nothing—no particles or even electromagnetic radiation such as light—can escape from it. The theory of general relativity predicts that a sufficiently compact mass can deform spacetime to form a black hole

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Zoo and wild life sanctuary

Posted by Aakanksha Choubey 5 years, 4 months ago

CBSE > Class 08 > Science

1 answers

Meghna Thapar 5 years, 4 months ago

The main difference between zoos and sanctuaries is how they acquire their animals. A zoo might buy, sell, breed, or trade animals, or even capture animals from the wild. ... A sanctuary also does not capture animals from the wild but acquires only animals who can no longer survive in the wild. The people at the sanctuary usually keep the animal mainly because it can't go in the wild by itself, or just because because they want to study that animal, but sometimes they release it back into the wild. Another reason sanctuaries are better is because the animals often die prematurely in zoos.

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Notes for chapter 4

Posted by Khawaish Shrama 5 years, 4 months ago

CBSE > Class 08 > Science

2 answers

Giri Kumari Sweety 5 years, 4 months ago

Yes

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Ankit Kumar 5 years, 4 months ago

You can find in cbse app Open science then click at chapter 4 then you will find cbse notes there

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What is alien?

Posted by Aditya Sheshma 5 years, 4 months ago

CBSE > Class 08 > Science

1 answers

Student . 5 years, 4 months ago

Alien is a monster

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ANSWER

A boy went to the market on his bicycle. He found that he had to apply a lot of force while pedaling. Why? What can you do to make the journey easy?

Posted by Anik Yadav 5 years, 4 months ago

CBSE > Class 08 > Science

1 answers

Pushpa Jangra 5 years, 4 months ago

Because he is moving against the air pressure or air . To make her journey easy he have to cycling in the direction of air .

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What is the function of Liver?

Posted by Yahiah Rahman 5 years, 4 months ago

CBSE > Class 08 > Science

5 answers

Aditya Sheshma 5 years, 4 months ago

Liver helps to breathe The liver break down balance of our body

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Shreejee Goenka 5 years, 4 months ago

Liver secretes bile hormone which is stored in gall bladder and helps in the digestion of food.

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Yahiah Rahman 5 years, 4 months ago

what is the function of liver? Answer: All the blood leaving the stomach and intestines passes through the liver. The liver processes this blood and breaks down, balances, and creates the nutrients and also metabolizes drugs into forms that are easier to use for the rest of the body or that are nontoxic.

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Himani Choudhary 5 years, 4 months ago

Liver secrets bile juice, which helps to digest fats.

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Krish Sachdeva 5 years, 4 months ago

Liver helps to breathe.

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ANSWER

What is the function of nerve

Posted by Riya Ray 5 years, 4 months ago

CBSE > Class 08 > Science

2 answers

Aditya Sheshma 5 years, 4 months ago

The nervous system has 3main function: sensory,integration, and motor. Sensory. The sensory function of the nervous system involves collecting information from sensory receptors that monitor the body's internal and external condition

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Yahiah Rahman 5 years, 4 months ago

The function of nerve: A nerve conveys information in the form of electrochemical impulses (as nerve impulses known as action potentials) carried by the individual neurons that make up the nerve. These impulses are extremely fast, with some myelinated neurons conducting at speeds up to 120 m/s.

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ANSWER

What is cellolose

Posted by Krishna Singh 5 years, 4 months ago

CBSE > Class 08 > Science

1 answers

Akshat Sirohi 5 years, 4 months ago

Cellulose is the form of carbohydrates which is present in grass which cows eat. It is also a natural substance that forms the cell walls of all plants and trees and is used for making plastics, paper, etc

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ANSWER

What is zaid crops

Posted by Vatsal Agrawal 5 years, 4 months ago

CBSE > Class 08 > Science

4 answers

Vatsal Agrawal 5 years, 3 months ago

Thanks

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Yahiah Rahman 5 years, 4 months ago

Zaid crops are summer season crops . They grow in long time period mainly from March to June. These crops are mainly grown in the summer season during a period called the "Zaid crop season." They require warm dry weather as major growth period and longer day length for flowering. The time between kharif crops and rabi crops

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Yogita Ingle 5 years, 4 months ago

Zaid Crops

Such crops are grown between the Kharif and Rabi seasons, i.e., between March and June.
These crops mature early.
Cucumber, pumpkin, bitter gourd, and watermelon are zaid crops.

1Thank You

Akshat Sirohi 5 years, 4 months ago

Zaid crops are crops which grow in summer season during a period called ''zaid crop season''. They require warm and dry weather as major growth period and longer day for flowering

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ANSWER

Where is alien

Posted by Vatsal Agrawal 5 years, 4 months ago

CBSE > Class 08 > Science

2 answers

Vatsal Agrawal 5 years, 3 months ago

No you are wrong

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Shruti Sinha ????? 5 years, 4 months ago

Inside Earth ?

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ANSWER

What is rabi crop? And tell with some examples??

Posted by Savi Sharma 5 years, 4 months ago

CBSE > Class 08 > Science

4 answers

Bhumika Saini 5 years, 4 months ago

Crops that grown during the winter season, from October to April for ex_ wheat , pea, mustard,gram, barley

2Thank You

Shruti Sinha ????? 5 years, 4 months ago

These crops are grown during winter season, between October and April, as they require less water. Eg. Wheat, gram & pea

2Thank You

Shrija Rayane 5 years, 4 months ago

Rabi crops are those crops which are grown in winter season . The months of Rabi crops are October to March. Ex:- wheat, pulses, mustard,barley etc.

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Komal Meena 5 years, 4 months ago

The crops which are grown in the winter season are called rabi crops. The period of rabi crops is from October to March. Crops such as wheat, pulses, mustard and barley are example of rabi crops

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ANSWER

What do understand by horticulture? Give examples of five plants which are grown under horticulture

Posted by Shivam Soni 5 years, 4 months ago

CBSE > Class 08 > Science

3 answers

Yogita Ingle 5 years, 4 months ago

Horticulture is the branch of agriculture which deals with study of crops. It means the preparation of a bit of land for plating seeds and raising plants. It involves cultivation, propagation, processing and marketing of ornamental plants, vegetables, fruits, nuts, flowers etc.

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Sanchita Ghosh 5 years, 4 months ago

Large scale cultivation of fruits , vegetables, flowers etc is called horticulture. Example-cactus , potato, tomato,cabbage, apple etc

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Ayush Kumar 5 years, 4 months ago

the study or practice of growing flowers, fruit and vegetables

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ANSWER

Which of the following is not a member of the solar system?

Posted by Mayank Gupta 5 years, 4 months ago

CBSE > Class 08 > Science

1 answers

Navya Raghuvanshi Navya Raghuvanshi 5 years, 4 months ago

Give options

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ANSWER

explain why the following are made of thermosetting plastics. a) saucepan handles b) electric plugs/switches/plug boards

Posted by Sanjay Bochare 5 years, 4 months ago

CBSE > Class 08 > Science

1 answers

Gaurav Seth 5 years, 4 months ago

(a) the handles of a saucepan are made of thermosetting plastic because it is a bad conductor of heat and does not get heated up while cooking.

(b) Electric plugs/ switches/ plug boards are saucepan is made of thermosetting plastic because it is a bad conductor of electricity. The electric current does not pass through such plastics.

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ANSWER

Explain the characteristics of microorganisms in Detail

Posted by Riya Sharma 5 years, 4 months ago

CBSE > Class 08 > Science

1 answers

Gayathri B 5 years, 4 months ago

Microorganisms

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ANSWER

What is the basic , functional and structural unit of life

Posted by Sniawmi Shadap 5 years, 4 months ago

CBSE > Class 08 > Science

2 answers

Yogita Ingle 5 years, 4 months ago

Functional unit of life

The cell is called the structural and functional unit of life as all living organisms are made up of cells.
Cells are also essential for performing various life processes required for sustaining life.
Furthermore, cells provide form and structure, process nutrients and convert it into useable energy.
Multicellular organisms have specialized cells that perform specific functions.

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Beastboysam Gaming 5 years, 4 months ago

Cell

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Metal can be fistigushed from non metals on the basis of there __________________ ___________________ propesteis

Posted by Kalpana Kalpana 5 years, 4 months ago

CBSE > Class 08 > Science

1 answers

Ankit Kumar 5 years, 4 months ago

First write the spelling right

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ANSWER

What is the micrograms

Posted by Sher Bahadur 5 years, 4 months ago

CBSE > Class 08 > Science

4 answers

Akanshi Gupta 5 years, 4 months ago

The microorganisms are the living organisms which are present everywhere. They can't be seen by naked eyes or unaided eyes. They can survive in all kind of climate conditions. Some microorganisms are helpful for us in many ways but some are harmful to us like they can cause diseases, etc.

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Ritika Talwar 5 years, 4 months ago

They are present everywhere. They can't be seen through naked eyes. They are capable of existing in all the conditions. Some microorganisms are helpful for us and some are harmful for us.

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Nishtha Sharma 5 years, 4 months ago

Microorganisms are the organisms which cannot be seen by naked eye or unaided eye

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Shalini Dhirwan 5 years, 4 months ago

Organisms that cannot be seen by naked eyes

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ANSWER

Name the major group of microorganisms

Posted by Ayush Choubey 5 years, 4 months ago

CBSE > Class 08 > Science

5 answers

Kaavya B 5 years, 4 months ago

There are four major groups of Micro-organisms. • Bacteria • Fungus • Algae • Protozoan As micro-organisms are living beings, viruses cannot be put tin that category. Viruses show the characteristics of non-living things and only become living on the body of the host.

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Ankit Kumar 5 years, 4 months ago

The major group of Microorganisms are below 1. Bacteria 2. Fungi 3. Protozoa 4. Algae

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Akanshi Gupta 5 years, 4 months ago

The four major of microorganisms are • BACTERIA • FUNGI • ALGAE • PROTOZOA

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Gaurav Seth 5 years, 4 months ago

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Microorganisms- A living organism that is very minute to be seen by the naked eye, especially a single celled organism, such as a bacterium is called microorganism. Microorganisms are classified into four major groups mainly bacteria, fungi, protozoa and some algae.

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Ayush Choubey 5 years, 4 months ago

The major group of microorganisms are photos of bacteria algae fungi

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ANSWER

What is meant by golgi apparatus

Posted by Anitha Anandakumar 5 years, 4 months ago

CBSE > Class 08 > Science

1 answers

Gaurav Seth 5 years, 4 months ago

Golgi apparatus

The stacks of flattened membranous vesicles are called Golgi apparatus.

It basically stores, packs and modifies the products in vesicles.

It temporarily stores protein that moves out of the cell through the vesicles of the Golgi apparatus.

It packs and transports the materials synthesised in Endoplasmic Reticulum to different targets inside and outside the cell.

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ANSWER

While sowing seeds a proper distance between seeds is important? Give reason

Posted by Komal Meena 5 years, 4 months ago

CBSE > Class 08 > Science

2 answers

Akanshi Gupta 5 years, 4 months ago

To avoid the overcrowding.

1Thank You

Sanchita Ghosh 5 years, 4 months ago

Sowing seeds at proper distance is important so that the germinated seeds get enough space for root and shoot development .That's why sowing seeds at proper distance is important

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ANSWER

What is mean by golgi apparatus

Posted by Komal Meena 5 years, 4 months ago

CBSE > Class 08 > Science

1 answers

Gaurav Seth 5 years, 4 months ago

The stacks of flattened membranous vesicles are called Golgi apparatus.

It basically stores, packs and modifies the products in vesicles.

It temporarily stores protein that moves out of the cell through the vesicles of the Golgi apparatus.

It packs and transports the materials synthesised in Endoplasmic Reticulum to different targets inside and outside the cell.

1Thank You

ANSWER

Domestication mean

Posted by Komal Meena 5 years, 4 months ago

CBSE > Class 08 > Science

1 answers

Gaurav Seth 5 years, 4 months ago

Domestication, the process of hereditary reorganization of wild animals and plants into domestic and cultivated forms according to the interests of people. In its strictest sense, it refers to the initial stage of human mastery of wild animals and plants. The fundamental distinction of domesticated animals and plants from their wild ancestors is that they are created by human labour to meet specific requirements or whims and are adapted to the conditions of continuous care and solicitude people maintain for them.

Domestication has played an enormous part in the development of humankind and material culture. It has resulted in the appearance of agriculture as a special form of animal and plant production. It is precisely those animals and plants that became objects of agricultural activity that have undergone the greatest changes when compared with their wild ancestors.

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Khad kitne prakar ke hai

Posted by Vanshika Khatri 5 years, 4 months ago

CBSE > Class 08 > Science

0 answers

ANSWER

Hi Can I have a learning regularly on this app

Posted by Yashashri Gawade 5 years, 4 months ago

CBSE > Class 08 > Science

4 answers

Akanshi Gupta 5 years, 4 months ago

Yes!!!!!

0Thank You

Ayushi Singh 5 years, 4 months ago

Yes why not

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Sniawmi Shadap 5 years, 4 months ago

Yes

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Yashashri Gawade 5 years, 4 months ago

Yes

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ANSWER

What do you mean by agriculture practice? List out all the agricultural practices

Posted by Sanyogita Maurya 5 years, 4 months ago

CBSE > Class 08 > Science

2 answers

Komal Meena 5 years, 4 months ago

The activities which are involved in cultivation of crops from soil preparation to harvesting are called agriculture practice

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Gaurav Seth 5 years, 4 months ago

Agricultural practices mean basically a collection of principles to apply for farm production processes in order to get better agricultural products. They are simply practices used in agriculture to facilitate farming. Nowadays, decent agricultural practices are some of the methods applied to agriculture, it helps to create food for consumers as well as for safe further processing. Our farmers are the key persons for the cultivation of crops to provide food to the entire population.

Various tasks performed by farmers for crop production are termed as Agricultural practices. Following activities form a part of Agricultural practices:

Preparation of soil
Sowing
Adding manure and fertilizers
Irrigation
Protecting from weeds
Harvesting
Storage

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Jutai kya hai

Posted by Vanshika Khatri 5 years, 4 months ago

CBSE > Class 08 > Science

3 answers

Ayushi Singh 5 years, 4 months ago

जोताई खेती का एक अहम हिऱसा है‌। जो खेती से पहले की जाती है इसमे हल से कठोर मिट्टी खोद कर ठीला करतेहै।ईसे जुताई कहते है।

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Vanshika Khatri 5 years, 4 months ago

Thank you anshu tiwari

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Khushboo Tiwari 5 years, 4 months ago

खेतो में हल के माध्यम से सख्त मिट्टी को खोद कर ढीला करना जुताई कहलाता है

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ANSWER

Nitrogen fixation means

Posted by Mary Arpitha 5 years, 4 months ago

CBSE > Class 08 > Science

2 answers

Khushboo Tiwari 5 years, 4 months ago

Yes gaurav is right and this fixation was done by rhisobium

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Gaurav Seth 5 years, 4 months ago

Nitrogen fixation:

Our atmosphere has 78% nitrogen gas.The atmospheric nitrogen gas cannot be utilised. The atmospheric nitrogen gas cannot be utilised directly by the plants or animals. The process of converting nitrogen gas of the atmosphere or air into compounds of nitrogen(which can be used by the plants)is called nitrogen fixation.

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A force of 8N is applied on an area of 2cm² calculate the pressure. &

Posted by Pronob Mardi 5 years, 4 months ago

CBSE > Class 08 > Science

1 answers

Gaurav Seth 5 years, 4 months ago

force=8N

area=2cm^

=0.0002m^

pressure=force/area

=8/0.0002

=40000N/m^ or 40000Pa

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ANSWER

What is cell? And type of cell?

Posted by Ayushi Singh 5 years, 4 months ago

CBSE > Class 08 > Science

4 answers

Ayushi Singh 5 years, 4 months ago

Thanks you all

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Komal Meena 5 years, 4 months ago

Cell is the basic unit of structure and functional of living organisms

1Thank You

Shreyas Patil 5 years, 4 months ago

Cell is the basic unit of life

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Yogita Ingle 5 years, 4 months ago

Cells are the basic, fundamental unit of life. So, if we were to break apart an organism to the cellular level, the smallest independent component that we would find would be the cell.

Cells are similar to factories with different labourers and departments that work towards a common objective. Various types of cells perform different functions. Based on cellular structure, there are two types of cells: