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

Irrigation is the process of applying water to soil, primarily to meet the water needs of growing plants. Water from rivers, reservoirs, lakes, or aquifers is pumped or flows by gravity through pipes, canals, ditches or even natural streams. ... The three main methods of irrigation are surface, sprinkler and drip/micro.

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What are the major grops of microorganisms?

Posted by Khanak Paliwal 3 years, 3 months ago

CBSE > Class 08 > Science

5 answers

Khanak Paliwal 3 years, 2 months ago

Thanks

1Thank You

Pavitra Patel 3 years, 3 months ago

Bacteria, fungi ,algae, protozoa,viruses

2Thank You

Abhijith Reddy 3 years, 3 months ago

Bacteria. Fungi. Protozoa. Algae

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Khushee Bhogayta 3 years, 3 months ago

Alage Fungi Protozoa Bacteria Viruses

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Logith Arun 3 years, 3 months ago

Algae, fungi, protozoa, bacteria.

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What is drip irrigation system?

Posted by Gideon Ganta 3 years, 4 months ago

CBSE > Class 08 > Science

2 answers

Shreya Dubey 3 years, 3 months ago

In this system, the water falls drop by drop directly near the roots.So it is called drip system

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Ronak Choudhary 3 years, 3 months ago

Dirp irrigation is the process in which water go drop by drop in the roots of the plant

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Write different ways of storing crop production?

Posted by Aditi Katre 3 years, 4 months ago

CBSE > Class 08 > Science

1 answers

Khushee Bhogayta 3 years, 3 months ago

Storing in mills and silos.

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In which season kharif crop is harvested?

Posted by Yashica Shree Shree 3 years, 4 months ago

CBSE > Class 08 > Science

5 answers

Kavya Dixit 3 years, 3 months ago

During Rainy season

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Rajni Maheshwari 3 years, 3 months ago

Rainy season is most suitable season for harvesting Rabi crops.During this period the crops are ready to cut and then

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Pavitra Patel 3 years, 3 months ago

In rainy season kharif crop is harvested and in the month of june to September

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Khushee Bhogayta 3 years, 3 months ago

June to October

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Preetam Lamani 3 years, 4 months ago

In rainy season kharif crop harvested

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How the water get ice

Posted by Yash Shukla 3 years, 4 months ago

CBSE > Class 08 > Science

3 answers

Khushee Bhogayta 3 years, 3 months ago

Due to coolnrss

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Pratik Rathod 3 years, 4 months ago

Due to the process of freezing

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Vaibhav Parmar 3 years, 4 months ago

Windowing

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For growing crops we need

Posted by Insha Momin 3 years, 4 months ago

CBSE > Class 08 > Science

3 answers

Sushree Sahoo 3 years, 4 months ago

For growing crop we need field seed nutrients sunlight temperature and water

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Pratik Rathod 3 years, 4 months ago

A good felid is neccesary

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Yash Shukla 3 years, 4 months ago

All thing that need to grow seed

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What is formula of water

Posted by Rajesh Kumar 3 years, 4 months ago

CBSE > Class 08 > Science

5 answers

Sushree Sahoo 3 years, 4 months ago

H2o is the formula of water

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Riya Patel 3 years, 4 months ago

H2o

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Kavya Dixit 3 years, 4 months ago

H2O

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Jeevana Dharma 3 years, 4 months ago

H2o

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Rajesh Kumar 3 years, 4 months ago

H2o

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The charge acquired by a glass rod when it is rubbed with silk is................... A)positive charge B) negative charge C)both

Posted by Anshika Aggarwal 3 years, 4 months ago

CBSE > Class 08 > Science

1 answers

Akanksha Patel 3 years, 4 months ago

after rubbing, the glass rod becomes positively charged and the silk gets negative charge

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What is Cell Meambrane

Posted by Shivam Thakkar 3 years, 4 months ago

CBSE > Class 08 > Science

2 answers

Sia ? 3 years, 4 months ago

The cell membrane is a biological membrane that separates the interior of all cells from the outside environment which protects the cell from its environment. The cell membrane consists of a lipid bilayer, including cholesterols that sit between phospholipids to maintain their fluidity at various temperatures.

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Radhna Bhakti 3 years, 4 months ago

The outer covering of cell which protects it from being damaged is known as cell membrane. Cell membrane is also known as plasma membrane

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Distinguish between metals and non - metals on the basic of yheir physical properties

Posted by Kusuma S 3 years, 4 months ago

CBSE > Class 08 > Science

1 answers

Sia ? 3 years, 4 months ago

Metals	Nonmetals
Metals are very hard except for sodium.	Non metals are soft except for diamonds.
Metals are generally malleable and ductile.	Non metals are generally brittle and can break down into smaller pieces.
They are shiny and lustrous.	They are not shiny and are non lustrous except iodine.
They are electropositive in nature.	They are electronegative in nature.
Metals are good conductors of heat and electricity.	Non metals are generally bad conductors of heat and electricity except graphite.
They are used in machinery. Example: Copper, silver, gold etc.	They have medicinal and chemical uses. Example: carbon, oxygen, sulphur etc.

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Under the effect of which hormone does mammary glands develop? (A) testosterone (b)estrogens (c) thyroxine (d) adrenaline

Posted by Saniya Shaikh 3 years, 4 months ago

CBSE > Class 08 > Science

1 answers

Manisha Gundlur 3 years, 4 months ago

Growth hormone, secreted from the pituitary gland, is an important global regulator of mammary gland development, but current evidence suggests that its effect on the mammary gland is mediated largely, or even entirely, through IGF1 whose production it stimulates in the stroma

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Which infection is caused by algae

Posted by Aasma Singla 3 years, 4 months ago

CBSE > Class 08 > Science

5 answers

Ramkanya Suthar 3 years, 4 months ago

Systemic chlorellosis,

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Aasma Singla 3 years, 4 months ago

Thanks ???

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Shree Varshita Ainapur 3 years, 4 months ago

kshitij mahindrakar class

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Roshni Gaha 3 years, 4 months ago

Systemic chlorellosis, an emerging infection in humans caused by algae.

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Aasma Singla 3 years, 4 months ago

Pls tell

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What is green house gas

Posted by Somya Giri 3 years, 4 months ago

CBSE > Class 08 > Science

1 answers

Priya Siddappa 3 years, 4 months ago

A greenhouse gas is a gas that absorbs and emits radiant energy within the thermal infrared range, causing the greenhouse effect. The primary greenhouse gases in Earth's atmosphere are water vapour, carbon dioxide, methane, nitrous oxide, and ozone.

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What is meaning of science

Posted by Swarna Kumari 3 years, 4 months ago

CBSE > Class 08 > Science

2 answers

Sia ? 3 years, 4 months ago

the intellectual and practical activity encompassing the systematic study of the structure and behaviour of the physical and natural world through observation and experiment.

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Yash Shukla 3 years, 4 months ago

I am science

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From the given v-t graph it can be inferred that the object is

Posted by J.G.Niveditha2007 J.G.Niveditha 3 years, 4 months ago

CBSE > Class 08 > Science

2 answers

Chandan Pilli 3 years, 4 months ago

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Magesh Kanth 3 years, 4 months ago

What is royan

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_ is the process of heat and cold treatment for preserving milk

Posted by B. Parnika B. Parnika 3 years, 4 months ago

CBSE > Class 08 > Science

3 answers

Akanksha Patel 3 years, 4 months ago

The process is called pesturisation

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Aasma Singla 3 years, 4 months ago

Pasteurization

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Siriya Palle 3 years, 4 months ago

Pasteurization

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_ are preserved by the use of oil and vinegar

Posted by B. Parnika B. Parnika 3 years, 4 months ago

CBSE > Class 08 > Science

2 answers

Aasma Singla 3 years, 4 months ago

Pickling

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Siriya Palle 3 years, 4 months ago

Picking

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_ are preserved by the use of oil and vinegar.

Posted by B. Parnika B. Parnika 3 years, 4 months ago

CBSE > Class 08 > Science

1 answers

Sia ? 3 years, 4 months ago

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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What happens when a metal placed above hydrogen in the reactivity series reacts with a dilute acid? Explain with the help of an example.

Posted by Sidhee Mishra 3 years, 4 months ago

CBSE > Class 08 > Science

0 answers

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Karif crops name please tell

Posted by Anjali Yadav 3 years, 4 months ago

CBSE > Class 08 > Science

5 answers

Shreya Dubey 3 years, 3 months ago

The crops that are sown in rainy season are called Kharif crops.It is sown in monsoon season (June/July) and harvested in (September/October) For example:- Rice , Maize , etc.

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Sushree Sahoo 3 years, 4 months ago

Kharif crops are wheat maize etc

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Jeevana Dharma 3 years, 4 months ago

Wheat paddy rice maize

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Gargi Agnihotri 3 years, 4 months ago

Paddy and maize

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Hari Dharshini 3 years, 4 months ago

Rice,maize

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Maize is a kharif crop

Posted by Vandana Fogaat Vandana Fogaat 3 years, 4 months ago

CBSE > Class 08 > Science

5 answers

S.Edward Roche 3 years, 4 months ago

Yes

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Ww Wwsingh 3 years, 4 months ago

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Ananya Tikait 3 years, 4 months ago

Yes

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Puja Singh 3 years, 4 months ago

Yes maize is a Kharif crop

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Prem Singh 3 years, 4 months ago

Yes

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Find out the information about the national park in Rajasthan and show location on the outline map of india

Posted by Mukta Samantaray 3 years, 4 months ago

CBSE > Class 08 > Science

1 answers

Kanzariya Kinjal 3 years, 4 months ago

Hindi

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write 10 lines of useful microorganism

Posted by Pranav Kiran 3 years, 4 months ago

CBSE > Class 08 > Science

2 answers

Aditi Rajput 3 years, 4 months ago

Lactobacillus is used to form curd from milk. Rhizobium present in pulse plants’ roots fix nitrogen from the air and supply nitrogen compounds to the pulse plants. Micro-organisms are also used in winemaking, baking, pickling, and other food-making processes. Alcoholic fermentation by yeast is widely used in the preparation of wine and bread. Microbes are used to reduce pollution. For example, decomposers such as bacteria and fungi break down dead bodies and excreta to form inorganic compounds, which plants can absorb. Microbes also play an important role in the preparation of medicines. Antibiotics are chemicals produced by microorganisms to kill bacteria. Penicillin is an antibiotic made from Penicillium. Bacteria in our intestine helps in proper digestion and release vitamin B, absorbed by the intestine. Many vaccines are prepared from micro-organisms. These vaccines are given to children to protect them from the disease. Certain microbes are also used in the biological treatment of sewage and industrial effluents. Yeast is used in making idli, bhaturas, bread, pastries, and cakes.

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Sa. Rajput 3 years, 4 months ago

Rfffrgedwsqadhjgdvsdffyfgufduyjuklkioojhjojyjoh

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Explain the formation of coal ?

Posted by Harshita Dogra 3 years, 4 months ago

CBSE > Class 08 > Science

2 answers

Kanu Choudhary 3 years, 4 months ago

When dead plant matter burried deep to the layer of soil. Due to high temperature and pressure this matter is convert into coal. And this process contains millions of years.

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Aditi Rajput 3 years, 4 months ago

Coal is a combustible black or brownish-black sedimentary rock, formed as rock strata called coal seams. ... Coal is formed when dead plant matter decays into peat and is converted into coal by the heat and pressure of deep burial over millions of years.

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Define ' Force ' ?

Posted by Harshita Dogra 3 years, 4 months ago

CBSE > Class 08 > Science

3 answers

Sachin Sawandkar 3 years, 4 months ago

push or pull on the object is called force.

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Aasma Singla 3 years, 4 months ago

It is a push or pull to that affects an object in some way ia called force. It is a measurable quantity. The si unit of magnitude of force is Newton (N)

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Aditi Rajput 3 years, 4 months ago

A push or pull on the object is called force.

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Define the term 'cell wall' ?

Posted by Harshita Dogra 3 years, 4 months ago

CBSE > Class 08 > Science

1 answers

Aasma Singla 3 years, 4 months ago

It is an additional wall outside the cell membrane. It is present in cell walls fungi and bacteria. The cell wall is important for plants since they don't have a skeleton for support and protection

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What are combustible substances ? Name one ?

Posted by Harshita Dogra 3 years, 4 months ago

CBSE > Class 08 > Science