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Important methods used for preserving food are :
Preservation by Salt : Common salt has been used to preserve meat and fish ages. Meat and fish are covered with dry salt to check the growth of bacteria. Salting is also used to preserve amla, raw mangoes, tamarind etc.
Preservation by sugar : Jams, jellies and squashes are preserved by sugar. Sugar reduces the moisture content which inhibits the growth of food spoiling bacteria.
Preservation by Oil and Vinegar : Use of oil and vinegar prevents spoilage of pickles because bacteria cannot live in such an environment. Vegetables, fruits, fish and meat are often preserved by this method.

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Lavanya Chopra 6 years, 5 months ago

Preservation by salt , oil , sugar and hot and cold treatment.

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Sanjay Rathinam 6 years, 5 months ago

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Name a disease caused by a (a) virus (b)bacteria in humans.

Posted by Mohsin Md 6 years, 5 months ago

CBSE > Class 08 > Science

1 answers

Sia ? 6 years, 5 months ago

smallpox.
tuberculosis

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ANSWER

Where can we find microorganisms

Posted by Mohsin Md 6 years, 5 months ago

CBSE > Class 08 > Science

3 answers

Samyak Prajapati 6 years, 5 months ago

We find micro organism everyehere amd it play very important role in our eco-system

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Saheblal Majhi 6 years, 5 months ago

We find microorganisms every where around us in the environment. They need moisture, water, oxygen, dark places and some particular temperature

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Jaswanth Jaswanth 6 years, 5 months ago

Every where extreame to least temperature

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ANSWER

What is a microbe

Posted by Mohsin Md 6 years, 5 months ago

CBSE > Class 08 > Science

2 answers

Sia ? 6 years, 5 months ago

A Microbe is a microscopic organism, which may exist in its single-celled form or in a colony of cells.

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Athokpam Abhijeet 6 years, 5 months ago

A microbe is an organism which are so small that they can not be seen with our naked eye

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How do plant and animal living inside water in cold region survive even after the freezing of water

Posted by Vasu Chikwa 6 years, 5 months ago

CBSE > Class 08 > Science

1 answers

Sia ? 6 years, 5 months ago

The animals in cold region have to protect themselves from cold temperature, snow and chilly winds. These animals have thick coat of fur, long hair and deposit of fat layer under skin. The skin of animals like walrus, seals and penguins are thick and protect them from cold.

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Why petroleum is called black gold

Posted by Gaurav Ranka 6 years, 5 months ago

CBSE > Class 08 > Science

2 answers

Pankaj Kumar 6 years, 4 months ago

Because it is black in color so people colled black gold

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Yogita Ingle 6 years, 5 months ago

because when crude oil is extracted from the land it is black in color. People call it gold because of its oils and value . It is very difficult to find. So it is called Black Gold

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Certain plants of same kind grown on a large scale is called -

Posted by Radharani Pujahari 6 years, 5 months ago

CBSE > Class 08 > Science

1 answers

Lavanya Chopra 6 years, 5 months ago

Crops

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What is prokaryotic cell?

Posted by Neeraj Shrivastav 6 years, 5 months ago

CBSE > Class 08 > Science

1 answers

Yogita Ingle 6 years, 5 months ago

The term “prokaryote” is derived from the Greek word “pro“, (meaning: before) and “karyon” (meaning: kernel). It translates to “before nuclei.“
Prokaryotes are one of the most ancient groups of living organisms on earth, with fossil records dating back to almost 3.5 billion years ago.
These prokaryotes thrived in the earth’s ancient environment, some using up chemical energy and others using the sun’s energy. These extremophiles thrived for millions of years, evolving and adapting. Scientists speculate that these organisms gave rise to the eukaryotes.
Prokaryotic cells are comparatively smaller and much simpler than eukaryotic cells. The other defining characteristic of prokaryotic cells is that it does not possess membrane-bound cell organelles such as a nucleus. Reproduction happens through the process of binary fission.

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What are called pathogens?

Posted by Isha Prasad 6 years, 5 months ago

CBSE > Class 08 > Science

4 answers

Athokpam Abhijeet 6 years, 5 months ago

Disease causing microorganisms are called pathogens.

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Samyak Prajapati 6 years, 5 months ago

The deaseas cause by micoorganism is called pathogen

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Gaurav Ranka 6 years, 5 months ago

Disease causing microbes are called pathogens

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Yogita Ingle 6 years, 5 months ago

If the organism can cause infectious diseases, it is an infectious agent. In this manual infectious agents which cause infection and illness are called pathogens.

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Why does the loosening of soil allow the roots to breathe easily

Posted by Honey Mangal 6 years, 5 months ago

CBSE > Class 08 > Science

1 answers

Yogita Ingle 6 years, 4 months ago

Loosening of the soil allows the roots of the plant to breathe easily as the air enters easily through loosening soil and the root can breathe easily even when they go deep into the soil.

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What is sexual harassment

Posted by Abhay Charan Bagh 6 years, 5 months ago

CBSE > Class 08 > Science

1 answers

Sia ? 6 years, 5 months ago

Sexual harassment includes a range of actions from mild transgressions to sexual abuse or sexual assault.

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Explain the cleaning equation of microorganism

Posted by Mansi Deora 6 years, 5 months ago

CBSE > Class 08 > Science

1 answers

Yogita Ingle 6 years, 4 months ago

The microorganisms decompose dead organic wastes of plants and animals converting them into simple substances. These substances are again used by other plants and animals. Thus, microorganisms can be used to degrade the harmful and smelly substances and thereby cleans up the environment.

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Sodium and potassium are stored in kerosene. Give reason...

Posted by Himanshu Sharma 6 years, 5 months ago

CBSE > Class 08 > Science

1 answers

Aalok Agrawal 6 years, 5 months ago

Sodium and potassium are very reactive metals they react with air water and catch fire so they stored in kerosene

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Advantages of manure

Posted by Abanti Nayak 6 years, 5 months ago

CBSE > Class 08 > Science

2 answers

Yogita Ingle 6 years, 5 months ago

Advantages of Manure

It increases the water holding capacity of the soil.
It makes the soil porous and facilitates the exchange of gases.
The texture of the soil improves.
The number of microbes increases in the soil.

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Vinay Prakash Singh 6 years, 5 months ago

Enhances water holding capacity Impro e texture of soil Increase no. Of good mocrobes in soik

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ANSWER

FORMATION OF COAL

Posted by Madhur Sahay 6 years, 5 months ago

CBSE > Class 08 > Science

3 answers

Himanshu Sharma 6 years, 5 months ago

Coal was formed during a period of over millions of years from dead plants that got buried inside the earth.

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Himanshu Sharma 6 years, 5 months ago

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Himanshu Sharma 6 years, 5 months ago

The formation of coal begins in area of swampy wetlands where groundwater is near or slightly above the topsoil because of this the flora present produces organic matter quickly -faster intact than it can be decomposed.In these areas, layer of organic matter are accumulated and then buried...

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IF 5 OBJECTS ARE PLACED ALONG WITH 5 MIRRORS RESPECTIVELY, AT THE ANGLE ON 45°, HIW MANY IMAGES ARE FORMED IN TOTAL

Posted by Madhur Sahay 6 years, 5 months ago

CBSE > Class 08 > Science

0 answers

ANSWER

Write an experiment to show that the pressure exerted by the liquids increases with the height.

Posted by Naafiya Nathar 6 years, 5 months ago

CBSE > Class 08 > Science

1 answers

Selva Bharath 6 years, 5 months ago

Take a bottle put three holes and stick tape on it and fill water the A holes,B holes,C holes and from A and B holes water will come slowly C goes more distance

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when any man fall in the old well then he died why

Posted by Santosh Kumar 6 years, 5 months ago

CBSE > Class 08 > Science

1 answers

Ramya Boopathi 6 years, 5 months ago

Coz there is no water in the old well??

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Write a short note on sprinkler system

Posted by Swaraj Kothari 6 years, 5 months ago

CBSE > Class 08 > Science

1 answers

Yogita Ingle 6 years, 4 months ago

In this system, there are perpendicular pipes with rotating nozzles on top. These pipes are joined to the main pipeline. Water flows through main pipeline under pressure by a pump. Water escapes from the nozzles & reaches the field.

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Descri describe describe two method of irrigation

Posted by Shivaleela Mgouda 6 years, 5 months ago

CBSE > Class 08 > Science

4 answers

Selva Bharath 6 years, 5 months ago

Moat ,chainpump,drip irrigation,sprinkler irrigation system,farrow irrigation

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Himanshu Sharma 6 years, 5 months ago

Sprinkler system and Drip irrigation...

1Thank You

Suhani Singh 6 years, 5 months ago

Traditional method and Morden method

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Navneet Kaur 6 years, 5 months ago

Sprinkle system and moat

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ANSWER

Graphite is used as an electrode. Why

Posted by Shiv Pooja 6 years, 5 months ago

CBSE > Class 08 > Science

1 answers

Sia ? 6 years, 5 months ago

Graphite is non-metal which is good conductor of electricity. Because of this reason graphite is used as an electrode in the dry cell.

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What is vaaine

Posted by Tisha Rajour 6 years, 5 months ago

CBSE > Class 08 > Science

1 answers

Sia ? 6 years, 5 months ago

A vaccine is a substance that helps protect against certain diseases. Vaccines contain a dead or weakened version of a microbe.

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How is an atom different from a cell ? Explain.

Posted by Aayush Raj 6 years, 5 months ago

CBSE > Class 08 > Science

1 answers

Meghna Thapar 5 years, 10 months ago

An atom can be defined as the smallest constituent particle of an element which showcases independent existence. However, cell is the smallest unit of life which has a definite structure and performs a specific function.

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Why is small intestine known as small intestine as it is large than large intestine

Posted by Shivam Kumar 6 years, 5 months ago

CBSE > Class 08 > Science

1 answers

Sia ? 6 years, 5 months ago

The small intestine is so called because its lumen diameter is smaller than that of the large intestine, although it is longer in length than the large intestine.

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Which enzyme is in us so therefore we can digest the milk in 1 or 2 hour?

Posted by Krisha Zala 6 years, 5 months ago

CBSE > Class 08 > Science