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

Cells combine to form tissues, tissues combine to form organs, organs combine to form body. This is termed as basic structural unit of all living organisms

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Yatharth Agrawal 2 years, 11 months ago

Cells are the basic structural units of living organisms because we all are made up of cells if cells is not a basisic structural unit of life so how the tissues are made if tissues are not made so how the organs are made if organs not made so how the organ system made is organ system not made so how the organism made

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Mr. Tanish 2 years, 11 months ago

It is as every living organism is made up of cell so it is its structural unit of life.

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Ansh Yadav 3 years ago

All cell is living organisms structural unit the invention of cell Rrrobbet hook in 1665 who invention a cell dead organisms There are two type of cell प्रोकैरियोटिक यूकैरियोटिक

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Shinjini Ghosh 3 years ago

All living organisms start their life from a single cell.A cell is the basic structural and functional unit of life.Many cells performing the same functions together form a tissue.Many tissues together form an organ.Different organs milker forged an organisation .Hence,Cell are the basic structural unit of living organisms.

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What are the advantages of using CNG & LPG as fuel

Posted by Tejas Vinod Bhandage 3 years ago

CBSE > Class 08 > Science

2 answers

Jinansh Dave 3 years ago

1) Less pollution 2) Can transpoted through pipes 3) Clean fuel

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Priyanka K 3 years ago

1) They have low calorific value. 2) They can be transported easily through pipelines. 3) They are clean fuels and do not give smoke when burnt.

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Difference between morden and traditional methods of irrigation

Posted by Avani Dahake 3 years ago

CBSE > Class 08 > Science

1 answers

Priyanka K 3 years ago

) Traditional Methods of Irrigation: in traditional methods water is lifted from water sources such as wells, lakes and canals by using human labour or cattle. Traditional methods are cheaper but less efficient. Examples of traditional methods moat (pulley-system), chain pump, dhekli and rahat (Lever system). Pumps are commonly used for lifting water. Pumps run on fuels such as diesel, biogas, electricity and solar energy. Modern methods of irrigation :- (i) Sprinkler System: In this method perpendicular pipes with rotating nozzles at the end, are joined to the main pipeline at regular intervals. When water flows through the main pipe under pressure, water escapes from the rotating nozzles. It gets sprinkled on the crop as if it is raining. (ii) Drip system: In this system, the water falls drop by drop directly near the roots of the plants, hence water is not wasted at all. It is the best technique for watering fruit plants, gardens and trees .

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Write any two viral disease

Posted by Gauri Khandwal 3 years ago

CBSE > Class 08 > Science

5 answers

Gauri Khandwal 2 years, 11 months ago

Vaccine is a antibiotic substance

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Pooja Tewatia 2 years, 11 months ago

Cold and cough

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Taniya Pal 3 years ago

Common cold and Covid

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Yatharth Agrawal 3 years ago

Covid 19 , swine flu

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Itz_Ur_Poko125 Minj 3 years ago

What is a vaccine

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The process of separating of gram from chaff after harvesting is known as

Posted by Kanishka Kanishka 3 years ago

CBSE > Class 08 > Science

5 answers

Jinansh Dave 2 years, 11 months ago

Threshing

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Ansh Yadav 3 years ago

Threshing

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Yatharth Agrawal 3 years ago

Threshing

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Aaradhya Khanduja 3 years ago

Threshing

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Ayushi Maheta 3 years ago

Threshing

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What is the young ones of cow?

Posted by Karthik K 3 years ago

CBSE > Class 08 > Science

5 answers

Sanjitha V 2 years, 11 months ago

Calf

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Mannat Sharma 2 years, 11 months ago

Calves

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Yatharth Agrawal 3 years ago

Calf

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Tom Tox 3 years ago

Cattle

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Ayushi Maheta 3 years ago

Calf

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What is the destructive distillation of coal

Posted by Ansh Tyagi 3 years ago

CBSE > Class 08 > Science

2 answers

Ansh Yadav 3 years ago

The process absence of the air is called destructive dislliation

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Yatharth Agrawal 3 years ago

Destructive distillation is the process in which many complex substance such as coal is heated.In this process coal is heated on 1000°C in the absence of air to obtain various substances such coke,coaltar, coal gas,ammonical liquor

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The gas involved when coal is heated in the absece of air

Posted by Megha Yadav Megha 3 years ago

CBSE > Class 08 > Science

2 answers

Yatharth Agrawal 3 years ago

Oxygen

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Karthik K 3 years ago

Coal gas is released when coal is heated in absence of air.

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ANSWER

Which of the following is not present in animal cell?

Posted by Yashita Sarukte 3 years ago

CBSE > Class 08 > Science

4 answers

Ansh Yadav 3 years ago

Cell wall and plastid they are not present in animal cells

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Parv Savjivani 3 years ago

Cell wall

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Yatharth Agrawal 3 years ago

Plastid,cell wall

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Aaradhya Khanduja 3 years ago

Chloroplasm

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What are the advantages of using CNG and LPG as fuels

Posted by Naitik Rawat 3 years ago

CBSE > Class 08 > Science

2 answers

Nandish Choudar 2 years, 11 months ago

The advantages of using CNG and LPG as fuels are :- A) non polluting fuels for vehicles B) it is used for power generation C) it can be used directly for burning in homes and factories D) they are more efficient

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Sudha 2002 2 years, 11 months ago

1.They have low caloforic value 2.can be transported easily 3.They are clean fluids do not give burn and smoke

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taking out paste from a toothpaste tube. which force is used in it

Posted by Vihaan Chokshi 8Th 3 years ago

CBSE > Class 08 > Science

3 answers

Jinansh Dave 3 years ago

Muscular force

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Karthik K 3 years ago

Muscular force

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Kushagra Bajpai 3 years ago

Muscular force

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What is the meaning ecosystem

Posted by Vansh Panwar 3 years ago

CBSE > Class 08 > Science

2 answers

Yatharth Agrawal 3 years ago

It includes all living organisms and their habitat and their interaction with non living components of the environment like sunlight, air,water and land

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Abhishek Kumar 3 years ago

A biological community of interacting organisms and their physical environment.

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Write 2 way through which we can prevent noise pollution

Posted by Sai Prasad Jena 3 years ago

CBSE > Class 08 > Science

1 answers

Kushagra Bajpai 3 years ago

1- Vehicles should be fitted with soft horns 2- Musical instruments, television, radios should played in low volume

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ANSWER

Two physical property of metal

Posted by Saksham Modanwal Modanwal 3 years ago

CBSE > Class 08 > Science

5 answers

Kushagra Bajpai 3 years ago

1- Metals are malleable 2- Metals are ductile

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Prakhar Jain 3 years ago

Metals are good conductor of heat and electricity

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Prakhar Jain 3 years ago

Metals can be ductility

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Pawar Vibhavari ♥️🧿 3 years ago

Following are two properties of Metals: 1.Metals are sonorous 2.Metals are lustrous

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Saksham Modanwal Modanwal 3 years ago

Metals are ductile Metals are lusturd

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Name two man made substance,two natural and two exhaustible substance

Posted by Misba Fathima 3 years ago

CBSE > Class 08 > Science

4 answers

Ansh Yadav 3 years ago

Home rode park man made resources Natural resources gas petroleum coal water are exchustible

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Yatharth Agrawal 3 years ago

Home,building man made Oil,coal natural Natural gas,petroleum exhaustible

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Kushagra Bajpai 3 years ago

MAN MADE- 1- Plastic 2- Glass NATURAL - 1- Water 2- Forest EXHASTIBLE-1- COAL 2- Petroleum

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Gungun Tagore 3 years ago

Man made substances :- utensils , plastic Two natural :- sun ,metal Exhaustible :- Coal , petrol

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What is the full Frome of CNG?

Posted by Rezalin Kumar 3 years ago

CBSE > Class 08 > Science

5 answers

Vipin Meena 3 years ago

Compressed natural gas

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Daksh Bais 3 years ago

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Kimaya Yadav 3 years ago

Compressed Natural Gas

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Gungun Tagore 3 years ago

Compressed Natural Gas

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Ayush Binu 3 years ago

Compressed natural gas

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ANSWER

Definition of coal tar

Posted by Kavya Prasad 3 years ago

CBSE > Class 08 > Science

4 answers

Ansh Yadav 3 years ago

Coal tar is used to manufactured a stell spell moth

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Yatharth Agrawal 3 years ago

A thick viscous layer formed below the ammonical liquor

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Kushagra Bajpai 3 years ago

Coal tar is a thick black coloured fluid produced when coal is heated. It is a mixture of compounds like benzene, naphthelene, phenol etc. which can seprated by frational destillation.

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Sardarji Dancer 3 years ago

a thick black liquid produced by distilling bituminous coal, containing benzene, naphthalene, phenols, aniline, and many other organic chemicals.

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ANSWER

I am black in colour produce heat on burning and breaking into pieces on hammering

Posted by Khushi Giri 3 years ago

CBSE > Class 08 > Science

5 answers

Saksham Modanwal Modanwal 3 years ago

Coal

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Sardarji Dancer 3 years ago

Coal

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Gungun Tagore 3 years ago

Coal

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Saksham Kumar 3 years ago

Iron or coal

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Lalit Kumar 3 years ago

Coal

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What is called as nylon

Posted by Loknath Sivaraman 3 years ago

CBSE > Class 08 > Science

1 answers

Kushagra Bajpai 3 years ago

Nylon is a first completely sythetic fibre. It is strongest fibre and also durable

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ANSWER

The top layer of soil is exposed

Posted by Pathan Rehan Khan Pathan Rehan Khan 3 years ago

CBSE > Class 08 > Science

1 answers

Sudha 2002 2 years, 11 months ago

If the top layer of soil is exposed , gradually the bottom layer of soil will also exposed ,The soil is hard and rocky,These type of soils are less fertile with least amount humus.

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The following table shows the total power shortage in india from 1991.1997 show the data in the form of graph plot shortage percentage for the years on the y axis and the year on the x axis

Posted by Bharath S C Bharath S C 3 years ago

CBSE > Class 08 > Science

1 answers

Bharath S C Bharath S C 3 years ago

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ANSWER

What is meant by efficiency of fuel

Posted by Natik Bakshani Bakshani 3 years ago

CBSE > Class 08 > Science

1 answers

Sushrita Mitra 3 years ago

Fuel efficiency is a form of thermal efficiency, it means the ratio of effort to result of a process that converts chemical potential energy contained in a carrier (fuel) into kinetic energy or work.

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In Reaction of water if example is sodium (Na) + water ( h^2o) = NaOh( in this from where Oh comes ) + H2

Posted by Muskan . 3 years ago

CBSE > Class 08 > Science

1 answers

Yatharth Agrawal 3 years ago

It is sodium hydroxide it comes because one molecule of hydrogen and one of oxygen and it will come 2H^20

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Aluminium oxide and zinc oxide are in nature?

Posted by Kartik Ghuraiya 3 years ago

CBSE > Class 08 > Science

3 answers

Yatharth Agrawal 3 years ago

Basic

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Sonit Shandilya 3 years ago

They are Basic in Nature

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B. Gupta 3 years ago

Basic

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By futher oxidation of sulphur dioxide what is form ?

Posted by Kartik Ghuraiya 3 years ago

CBSE > Class 08 > Science

1 answers

Kartik Ghuraiya 3 years ago

So3 sulphur trioxide

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Name two catalist which is used haber process of making amonia

Posted by Kartik Ghuraiya 3 years ago

CBSE > Class 08 > Science

1 answers

Kartik Ghuraiya 3 years ago

Mollidanam and iron Fe and Mo

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ANSWER

State some beneficial effects of bacteria

Posted by Raja Singh 3 years ago

CBSE > Class 08 > Science

2 answers

Kartik Ghuraiya 3 years ago

Like lactobacillus bacteria helps to make milk into curd. Rhizobium,nostac, anabaena helps in balancing nitrogen.denitrifying bacteria like thyobacillus and nusdomonas.

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Master Gaming Hgg 3 years ago

Cell organism

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