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Dharmendra Kushwaha 6 years, 4 months ago

If there would no insects on Earth then we will not be no flowers no fruit. This is because pollination will not carried. The soil become infertile. We can't get honey.

Anushka ?? Singh 6 years, 4 months ago

If there will be no insects then there will be no decomposers to decompose the dead and decaying matter and the ecosystem will not be maintained.

Omkar Shiral 6 years, 4 months ago

There will be no soil fertile Because insects make soil fertile

ANSWER

What is the name of smallest cell in the world???

Posted by Jagyaseni Behera 6 years, 4 months ago

CBSE > Class 08 > Science

5 answers

Dharmendra Kushwaha 6 years, 4 months ago

The smallest cell in the world is Mycoplasma. It is 10 micrometer. Micrometer means one million of meters. The largest cell in the world is ostrich egg cell.

Kalyani Jaybhaye 6 years, 4 months ago

Mycoplasma gellicepticum

Ayesha Khatua 6 years, 4 months ago

The smallest cell is mycoplasma.The largest cell is egg of ostrich.

Reena Bakshi 6 years, 4 months ago

Mycoplasma gallicepticum

3Thank You

Bellamkonda Surya Kiran 6 years, 4 months ago

Mycoplasma gallicepticum

6Thank You

ANSWER

What is the main constituent of petroleum and coal

Posted by Shweta Yadav 6 years, 4 months ago

CBSE > Class 08 > Science

1 answers

Yogita Ingle 6 years, 4 months ago

Coal:

It a black colored hard substance. It is a sedimentary rock that burns.
It is composed of carbon, hydrogen, oxygen and minor amounts of sulphur and nitrogen.

Constituent of Petroleum

Petroleum Gas in Liquid form
Petrol
Kerosene
Diesel
Lubricating oil
Paraffin wax
Bitumen

ANSWER

What percentage of a forest in a country???

Posted by Himanshi Jhawar 6 years, 4 months ago

CBSE > Class 08 > Science

5 answers

Aviral Chitransh 6 years, 4 months ago

21.54%

Dharmendra Kushwaha 6 years, 4 months ago

24.39%

Ayesha Khatua 6 years, 4 months ago

The answer is 24.54 is round off to 22% .

Reena Bakshi 6 years, 4 months ago

24.39? %%%

Bellamkonda Surya Kiran 6 years, 4 months ago

24.39 percentage

ANSWER

In an experiment 4.5 kg of a fuel was completely burnt and heat produced was measured to be 18000 kj calculate the calorific value of the fuel

Posted by Himanshi Jhawar 6 years, 4 months ago

CBSE > Class 08 > Science

2 answers

Dharmendra Kushwaha 6 years, 4 months ago

Calorific value=total heat produce/amount of fuel used So, 1800/4.5= 400kilo/Joule

Ayesha Khatua 6 years, 4 months ago

4000 kj/kg.

ANSWER

What is the pure form of carbon?

Posted by Anushka ?? Singh 6 years, 4 months ago

CBSE > Class 08 > Science

10 answers

Sreekala K 6 years, 4 months ago

Diamond

Dharmendra Kushwaha 6 years, 4 months ago

Coke

Suraj Deo Sharma 6 years, 4 months ago

Coke is a pure form of carbon ?✌???

Anushka ?? Singh 6 years, 4 months ago

The correct answer is Coke?

Ayesha Khatua 6 years, 4 months ago

Diamonds? is the pure form of carbon

Reena Bakshi 6 years, 4 months ago

Coal tar

Prerna Nair 6 years, 4 months ago

Coke

Dharwaj Sudhish 6 years, 4 months ago

Coal

Ashow Sahani 6 years, 4 months ago

Grephite and dimond

Bellamkonda Surya Kiran 6 years, 4 months ago

Diamond and Graphite

ANSWER

What a reproduction

Posted by Karan Karki 6 years, 4 months ago

CBSE > Class 08 > Science

4 answers

Seema Gupta 6 years, 4 months ago

The ability of all living organisms to produce their own individuals is known as reproduction.

Dharmendra Kushwaha 6 years, 4 months ago

The process of reproducing the young own of same character by the parents is called reproduction.

Yogita Ingle 6 years, 4 months ago

The process by which an organism produces its offspring is called reproduction.

Bellamkonda Surya Kiran 6 years, 4 months ago

the production of offspring by a sexual or asexual process.

ANSWER

How many national parks, wildlife sanctuaries, biosphere reserves are present in Krishna district in Andhra Pradesh?

Posted by Bellamkonda Surya Kiran 6 years, 4 months ago

CBSE > Class 08 > Science

1 answers

Dharmendra Kushwaha 6 years, 4 months ago

So funny

ANSWER

How can we prevent earthquake

Posted by Alok Kumar Tiwari 6 years, 4 months ago

CBSE > Class 08 > Science

2 answers

Dharmendra Kushwaha 6 years, 4 months ago

How to Prevent Earthquake Damage Secure your belongings. The largest financial loss you can incur during an earthquake will be from falling objects and overturned furniture. ... Put latches on cabinet doors and file cabinets. ... Fasten your water heater and other appliances. ... Store hazardous materials in a sturdy place. ... Keep fire extinguishers.

Sia ? 6 years, 4 months ago

We can take following steps to mitigate the effect of earthquake:
(i) Establishing earthquake monitoring centres for regular monitoring and fast dissemination of information.
(ii) Use of Geographical Positioning System (GPS).
(iii) Preparing a vulnerability map of the country and dissemination of vulnerability risk information.
(iv) Modifying the house types and building-designs in the vulnerable areas and discouraging construction of high-rise buildings, large industrial establishments and big urban centres in such areas.

ANSWER

How can save water

Posted by Preeti Keshari 6 years, 4 months ago

CBSE > Class 08 > Science

5 answers

Dharmendra Kushwaha 6 years, 4 months ago

We can save water as follows:- 1. Not wasting too much water in bathroom. 2. Industrial waste should not spread in water. 3. Rainwater harvesting should practice. 4. Dams should be built to preserve water. 5. Not wasting water in irrigation.

Arpita Singh 6 years, 4 months ago

We can save water by following ways Close the tap during brushing or bathing Rain water harvesting

Ak Kavale 6 years, 4 months ago

By rainwater harvesting . Not to waste water by leaving taps open while you brush or bath

Yogita Ingle 6 years, 4 months ago

By building small check dams and tanks which are not only environment-friendly but also recharge groundwater.
By rainwater harvesting and collecting rooftop water.
To keep a check on industrial effluents which pollute rivers.
To take every possible step at the personal level to save water (e.g. close the tap while brushing teeth, wash vegetables in a pan rather than directly under tap water etc.).

Vinod Swami 6 years, 4 months ago

Drip irrigation Rainwater harvesting Waste water treatment plant

3Thank You

ANSWER

What is mean by coal and petroleum

Posted by Ashhhh 777 6 years, 4 months ago

CBSE > Class 08 > Science

3 answers

Dharmendra Kushwaha 6 years, 4 months ago

Coal is fossil fuels formed by dead remain of plants over mīllîøñ of year's. Million of years ago Forest buried under ground due to earthquake and flood. Coal commonly consist of carbon, hydrogen, oxygen nitrogen and sulphur. Coal maily contain carbon. Coal is of three types:- 1. Anthracite:- it is the most pure form of coal. It contains 96%of carbon. 2. Bituminous :- It contains 65% of carbon. 3. Lignite:- It contains 38% of carbon. Petroleum is formed over 300 mīllîøñ years ago. It is formed by dead marine animals. When they died, then they settled on seabed. Then by sand they covered and high pressure and heat change then in form of hydrocarbon. Hydrocarbon is the long chain of hydrogen and carbon. E.g CH4, C2H6 etc. Most useful product of petroleum is petroleum gas, gasoline and naphtha, kerosene, light oil, heavy oil and residue.

Ashhhh 777 6 years, 4 months ago

Thnx devanshi

Devanshi Kothari 6 years, 4 months ago

They are fossil fuels..which er exhaustible and they take 300 millions years to reform

ANSWER

Jsjekdjf

Posted by Shafic Leaner 6 years, 4 months ago

CBSE > Class 08 > Science

1 answers

Shafic Leaner 6 years, 4 months ago

Hshdhr

ANSWER

Which part of the cell contain organells

Posted by Prince Kapoor 6 years, 4 months ago

CBSE > Class 08 > Science

1 answers

Sarwaksh Sinha 6 years, 4 months ago

Cytoplasm

ANSWER

What is glaucoma?

Posted by Supreet Samal 6 years, 4 months ago

CBSE > Class 08 > Science

1 answers

Dharmendra Kushwaha 6 years, 4 months ago

A group of eye condition that caused blindness.

ANSWER

What does a loudness of sound depends on?

Posted by Nirjeet Kaur 6 years, 4 months ago

CBSE > Class 08 > Science

1 answers

Dharmendra Kushwaha 6 years, 4 months ago

The loudness of sounds depends on aphlitude of vibration.

ANSWER

In earth there is gravity if we throw apple ip it will come down but why aeroplane does not come out

Posted by Dhruvrajsinh Chudasama 6 years, 4 months ago

CBSE > Class 08 > Science

0 answers

ANSWER

Draw a labelled diagram of nucleus and expain its part?

Posted by Lakshay Goel 6 years, 4 months ago

CBSE > Class 08 > Science

1 answers

Yogita Ingle 6 years, 4 months ago

Nuclear membrane. - it separate the nucleus from cytoplasm nucleus porous allow the substance to in and out of the nucleus chromatin thread contains DNA which contain hereditary character which are transferred from offspring to another nucleolus.

ANSWER

How polester made

Posted by Vishwash Modi 6 years, 4 months ago

CBSE > Class 08 > Science

1 answers

Yogita Ingle 6 years, 4 months ago

Polyester is manufactured from petroleum. It is a category of polymer which contain an ester group in their main chain. PET (Polyethylene terephthalate), the commonly used polyester, is made from two monomers by condensation polymerization.

ANSWER

What is alge

Posted by Ayushman Maurya 6 years, 4 months ago

CBSE > Class 08 > Science

3 answers

Seema Gupta 6 years, 4 months ago

Algae are the green patches.

Arpita Singh 6 years, 4 months ago

It is a autotrophic plant as well as a microorganism .it is a plant because of the presence of chlorophyll in it

Gaurav Seth 6 years, 4 months ago

Algae or thallophyta are a classification of the plant kingdom. Algae have the following characteristics:

(i) Plants which have thaloid body i.e., body is not differentiated into root, stem and leaf.

(ii) Plant cells contain pigment like chlorophyll and other pigment and are autotrophic.

(iii) They are prdominantly aquatic.

Example. Spirogyra, Ulothrix, Cladophora, Ulva and Chara.

Thallophyta-Algae.

ANSWER

What are the differences between metals and nonmetals according to its physical properties

Posted by Bellamkonda Surya Kiran 6 years, 4 months ago

CBSE > Class 08 > Science

3 answers

Seema Gupta 6 years, 4 months ago

Metals are good conductor of heat and electricity while non metals are not.

Mayank Prajapati 6 years, 4 months ago

The basic difference between metal and non metal is that metals are sonorous, ductile, mealable, shining in nature and nomarlly Metals are hard in nature at room temperature while non metals are not sonorous, ductile, mealable in nature they also don't have shining property and most of the non metals are soft in nature.

Hidayatulla Khan 6 years, 4 months ago

What is meat by deforestation ?

ANSWER

What is another name of petroleum

Posted by Prerna Nair 6 years, 4 months ago

CBSE > Class 08 > Science

8 answers

Sreekala K 6 years, 4 months ago

Black gold

Prerna Nair 6 years, 4 months ago

Correct

Anushka ?? Singh 6 years, 4 months ago

Black gold

Prerna Nair 6 years, 4 months ago

Yaa

P Vaishnavi 6 years, 4 months ago

Black gold is the correct answer

Prerna Nair 6 years, 4 months ago

Answer is black gold

Prerna Nair 6 years, 4 months ago

Parshva Parshva 6 years, 4 months ago

Fossil feul

ANSWER

Example of electrostatic force

Posted by Than Singh 6 years, 4 months ago

CBSE > Class 08 > Science

1 answers

Yogita Ingle 6 years, 4 months ago

Electrostatic force is the force that exists between electrically charged particles or objects at rest.

Examples of electrostatic forces:

When we run a piece of paper with the oil in our head with the help of a comb produces electrostatic force.
Balloons get attracted to another balloon when one of them are rubbed with hair.
When I do iron my silk or cotton cloth and keep it right in front of me, they just cling on to my body.
Lightning is also another example of electrostatic force."

ANSWER

What type of resources of natural gas and why

Posted by Iftekhar Ahmad 6 years, 4 months ago

CBSE > Class 08 > Science

1 answers

Meghna Thapar 5 years, 10 months ago

Natural gas is a natural resource present in limited quantity in nature and can be exhausted by human activities. It mainly consists of methane with small quantities of ethane and propane. When natural gas is compressed by applying pressure, it is called Compressed Natural Gas (CNG).

ANSWER

What is wildlife

Posted by Roshan Kumar Bhandari 6 years, 4 months ago

CBSE > Class 08 > Science

1 answers

Aayush Raj 6 years, 4 months ago

All kinds of animal life found in a particular region is called wildlife.

ANSWER

Diffene atoms

Posted by Satyajeet Paswan 6 years, 4 months ago

CBSE > Class 08 > Science

1 answers

Aayush Raj 6 years, 4 months ago

Atom is the smallest particle of an element which can't be further divided by chemical means to give chemical properties of any other elements. It has all the properties of the element made up of.

ANSWER

Where do Protozoa digest their food

Posted by Sarvesh Kashyap 6 years, 4 months ago

CBSE > Class 08 > Science

1 answers

Sarvesh Kashyap 6 years, 4 months ago

Where do Protozoa digest their food

ANSWER

Why coal are used in factories and why coal is black in colour.

Posted by Anirudh Singh 6 years, 4 months ago

CBSE > Class 08 > Science

2 answers

Sia ? 6 years, 4 months ago

Coal is processed in industry to get some useful products such as coke, coal tar and coal gas. It is a tough, porous and black substance. It is an almost pure form of carbon.

Gurleen Kaur 6 years, 4 months ago

Coal is used in factories to form some new products. It is black in colour because it is a pure form of carbon

ANSWER

when cold water in kept in burns you will get a cool effect

Posted by Hema Manoj 6 years, 4 months ago

CBSE > Class 08 > Science

1 answers

Sia ? 6 years, 4 months ago

Do not use ice or iced water on burns. The extreme cold causes constriction of the blood vessels and can worsen injury by reducing blood supply

ANSWER

What is spum

Posted by Lucky Sharma 6 years, 4 months ago

CBSE > Class 08 > Science

0 answers

ANSWER

Give the example of slow combution

Posted by Aalok Agrawal 6 years, 4 months ago

CBSE > Class 08 > Science

2 answers

Seema Gupta 6 years, 4 months ago

Wood

Yogita Ingle 6 years, 4 months ago

Combustion is a chemical process in which a substance reacts with oxygen and gives out energy during the process in the form of either heat or light or both. Rusting of an iron is an exothermic process as heat is released in rusting. Hence it is a kind of slow combustion.