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

Ask questions which are clear, concise and easy to understand.

Ask Question

Why do we fish and frogs lay eggs in hundred whereas a hen lays only one egg at a time

Posted by Zaheer Ahmed Zaheer Ahmed 5 years, 7 months ago

CBSE > Class 08 > Science

1 answers

Sourav Kumar 5 years, 6 months ago

Fish lay hundred egg because some of them are eaten by aquatic animals and some are hatched

0Thank You

ANSWER

Two laws of reflection

Posted by Aniket Das 5 years, 7 months ago

CBSE > Class 08 > Science

3 answers

Shambhavi Kumari 5 years, 6 months ago

The following are the laws of reflection - 1)The angle of incidence is always equal to the angle of reflection. 2)The incident ray,the reflected ray and the normal at the point of incidence all lie on the same plane.

0Thank You

Nandini. K. Rajanal 5 years, 7 months ago

1) according to the first law of reflection the angle of reflection is always equal to angle of incidence. 2)according to the second law of reflection incident ray, reflected ray and normal lie on the same line.

0Thank You

Richa Sinha 5 years, 7 months ago

The two laws of reflections are _1) angle of incidence and angle of reflection is always same. 2) incident ray ,normal ray and reflected ray all lie on the same plane .

0Thank You

ANSWER

What is COC

Posted by Sumit Kumar### 5 years, 7 months ago

CBSE > Class 08 > Science

1 answers

Gouri Malani 5 years, 7 months ago

Clash of clans

0Thank You

ANSWER

Why do fish and frog lay eggs in hundreds whereas a hen lays one egg at a time

Posted by Adhi Kesvalu Megu 5 years, 7 months ago

CBSE > Class 08 > Science

1 answers

Richa Sinha 5 years, 7 months ago

The fish and frog lay eggs in hundreds and millions of sperm because all the eggs do not get fertilized and developd into an new individuals. This is because the eggs and sperms get exposed to water movement , wind rainfall also , there are other animals in the pond which may feed on eggs . Thus production of large number of eggs and sperm is necessary to ensure fertilisation of at least at a few of them.??

2Thank You

ANSWER

What is menstruations?

Posted by Arjun Kumar 5 years, 7 months ago

CBSE > Class 08 > Science

1 answers

Maria Aradan 5 years, 7 months ago

if fertiliation does not occure in female the released egg and the thickened lining of the uterus along with its blood vessels are shed of this cause bleeding in female which is called mensuration

0Thank You

ANSWER

Sukshm Jeev Kise Kahate Hain

Posted by Deepak Vishwakarma 5 years, 7 months ago

CBSE > Class 08 > Science

2 answers

Aditya Narayan Singh 5 years, 7 months ago

Microorganisms

0Thank You

Richa Sinha 5 years, 7 months ago

Microorganisms is a very small organisms which we can't see to our Naked eyes we can see these organisms only with the help of microscope for example bacteria,fungi,algae, protozoa, viruses etc.

0Thank You

ANSWER

Defination of asexual reproduction

Posted by Geeta Maan 5 years, 7 months ago

CBSE > Class 08 > Science

3 answers

Richa Sinha 5 years, 7 months ago

A sexual reproduction is a type of reproduction in which only one female parent is involved and in this reproduction the offspring is the exact copy of her/his parent. For example hydra ,amoeba

0Thank You

Maria Aradan 5 years, 7 months ago

The type of reproduction in which only a single parent is involved is called a sexual reproduction

0Thank You

Aviroop Ghosh 5 years, 7 months ago

A type of reproduction where single parent is involved to produce off Springs are known as asexual reproduction

0Thank You

ANSWER

Please give the science final question paper!

Posted by Jayati Thukral 5 years, 7 months ago

CBSE > Class 08 > Science

1 answers

Madhu Gupta 5 years, 7 months ago

Exam wale din mil jayega

0Thank You

ANSWER

Difference between ursa major and utsa minor

Posted by Bhavya Mehandiratta 5 years, 7 months ago

CBSE > Class 08 > Science

1 answers

Anshumaan Mishra 5 years, 7 months ago

Hame saptrishi ko. urasa majour bataya jata hai jabki wo ursa minor hai

0Thank You

ANSWER

Please let me know about the syllabus of final exams

Posted by Himanshu Mehra 5 years, 7 months ago

CBSE > Class 08 > Science

1 answers

Jayati Thukral 5 years, 7 months ago

Well, it depends from school to school. Like in our school the whole book, except chapters 5 and 7, is coming.

0Thank You

ANSWER

Please give me science paper final question paper

Posted by Umesh Bisht 5 years, 7 months ago

CBSE > Class 08 > Science

2 answers

Mayankkumar Sahoo 5 years, 7 months ago

Ok I will give you

3Thank You

George Washington 5 years, 5 months ago

I.d. k

3Thank You

ANSWER

What is difference between meteoroids, meteors and meteorites?

Posted by Ramish Sadaf 5 years, 7 months ago

CBSE > Class 08 > Science

4 answers

Maria Aradan 5 years, 7 months ago

Meteorites: some meteors are so large that a part of them reaches the surface of the earth before they evaporate completely .these are called meteorites

0Thank You

Maria Aradan 5 years, 7 months ago

meteors: a meteor is usually a small heavenly object moving around the sun. when meteor occasionally enters the earth's atmosphere, it gets heated up because of friction and glows but evaporates in a very short period of time. that is why ,they appear as a bright streak in the sky .

0Thank You

Jayati Thukral 5 years, 7 months ago

Meteors - A shooting star; when a meteoroid enters the Earth's atmosphere and vaporizes. Meteoroids - A small particle from a comet or asteroid orbiting the Sun. Meteorites - When a meteor survives the Earth's atmosphere and lands up on the Earth's surface.

0Thank You

Bipul Haloo 5 years, 7 months ago

Lul,lulli, Lund

0Thank You

ANSWER

Which is biggest star

Posted by Rathna ರತ್ನ 5 years, 7 months ago

CBSE > Class 08 > Science

9 answers

Krishna Chauhan 5 years, 6 months ago

Vy canis majoris

1Thank You

Vinayak Singh 5 years, 7 months ago

UV sceuti

1Thank You

Gaurav Singh 5 years, 7 months ago

Pole star

0Thank You

Sana Khan 5 years, 7 months ago

Sun is also a star

0Thank You

Anshumaan Mishra 5 years, 7 months ago

Let the star be x

0Thank You

Harnam Singh Dangi 5 years, 7 months ago

Jupiter

1Thank You

Sriya? Ghosh 5 years, 7 months ago

vy canis majoris

1Thank You

Sarah Singh 5 years, 7 months ago

It's actually not discovered yet

1Thank You

Rishabh Yadav 5 years, 7 months ago

Pole star

1Thank You

ANSWER

Which phenomena of light is used in making of kaleidoscope?

Posted by Siddhi Tupe 5 years, 7 months ago

CBSE > Class 08 > Science

2 answers

Shambhavi Kumari 5 years, 6 months ago

Multiple Image Formation

0Thank You

Monika Hada 5 years, 7 months ago

Dispersion

0Thank You

ANSWER

Explain about comets ,meteors ,natural satelites, asteroids and about all planets in solar system

Posted by Lija Gigi 5 years, 7 months ago

CBSE > Class 08 > Science

1 answers

Meghna Thapar 5 years, 7 months ago

The solar system is made up of the sun and everything that orbits around it, including planets, moons, asteroids, comets and meteoroids.

The term meteor is used to describe the streak of light produced as matter in the Solar System falls into Earth's atmosphere creating temporary incandescence resulting from atmospheric friction.

A meteoroid is matter revolving around the sun or any object in interplanetary space that is too small to be called an asteroid or a comet. Even smaller particles are called micrometeoroids or cosmic dust grains, which includes any interstellar material that should happen to enter our solar system.

0Thank You

ANSWER

What is in clonning

Posted by Lija Gigi 5 years, 7 months ago

CBSE > Class 08 > Science

2 answers

Varsha Garg 5 years, 7 months ago

Clonning is creating an identical copy of an organism by copying it's genetic material

0Thank You

Sarah Singh 5 years, 7 months ago

Clonning is making a same copy of an organism by putting nucleas of the organism we want to clone in the egg of another mother . So, its consequences will be that the organism reproduced will be the same copy as that of the organism whose nucleas we have taken

2Thank You

ANSWER

What is air pollution ? Write its causes and problem faced by us . How can we control it

Posted by Paresh Khamari 5 years, 7 months ago

CBSE > Class 08 > Science

2 answers

Maria Aradan 5 years, 7 months ago

When the air is contaminated by unwanted substances which have a harmful effect on both the living and nonliving components it is referred to as air pollution.

1Thank You

Kumar Aaditya 5 years, 7 months ago

Air pollution is a mixture of unwanted substance or pollutants. It can cause cancer, skin problems and high BP etc. We can control it by reducing vechiles using LPG and CNG gases. We can also make some rules on it.

2Thank You

ANSWER

Write the name of two sexsually reproduction in animal

Posted by Ramesj Saroj 5 years, 7 months ago

CBSE > Class 08 > Science

1 answers

Meghna Thapar 5 years, 7 months ago

Dogs and human beings are sexually reproducing animals.

0Thank You

ANSWER

In which part of the sky can u find venus if it is visible as an evening star

Posted by Navika Maheshwari 5 years, 7 months ago

CBSE > Class 08 > Science

1 answers

Shreyanshu Singh 5 years, 7 months ago

Sometimes,venus appears in the western sky just after sunset.

0Thank You

ANSWER

Which has the highest ignition temperature

Posted by Dhanush S 5 years, 7 months ago

CBSE > Class 08 > Science

5 answers

Krishna Chauhan 5 years, 6 months ago

Its coal only 600degree Celsius

0Thank You

Sriya? Ghosh 5 years, 7 months ago

Its coal

0Thank You

Ujjaini Patil 5 years, 7 months ago

Coal

2Thank You

Imtiyaz Ahmad 5 years, 7 months ago

PETROL

0Thank You

Sailesh Kumar 5 years, 7 months ago

I think diamond

0Thank You

ANSWER

What is the function of galvanometer

Posted by Shreya Shukla 5 years, 7 months ago

CBSE > Class 08 > Science

1 answers

Meghna Thapar 5 years, 7 months ago

Galvanometer is an instrument for measuring a small electrical current or a function of the current by deflection of a moving coil.

0Thank You

ANSWER

What is planck's constant?

Posted by Utkarsh K 5 years, 7 months ago

CBSE > Class 08 > Science

1 answers

Meghna Thapar 5 years, 7 months ago

The Planck constant, or Planck's constant, denoted as h, is a physical constant that is the quantum of electromagnetic action, which relates the energy carried by a photon to its frequency.

1Thank You

ANSWER

What is the coldeat flame in candle

Posted by Aman Gahlot 5 years, 7 months ago

CBSE > Class 08 > Science

1 answers

Meghna Thapar 5 years, 7 months ago

Innermost zone: The innermost zone of a flame is dark or black. It consists of hot, unburnt vapours of the combustible material (candle). It is the least hot part of the flame.

0Thank You

ANSWER

What is pesticides

Posted by Krishana Tyagi 5 years, 7 months ago

CBSE > Class 08 > Science

2 answers

Prabhat Kumar 5 years, 7 months ago

Pesticides is a type of special Chemical which kill the pests without effecting crop plant.

0Thank You

Moorthy.C.N Moorthy.C.N 5 years, 7 months ago

Pesticides are substances meant to control pests,including weeds.?

1Thank You

ANSWER

Which non-metal is nither a gas nor a solid at room temperature?

Posted by Harsh Goyal 5 years, 7 months ago

CBSE > Class 08 > Science

4 answers

Gundubogula Srujana 5 years, 7 months ago

Bromine.

1Thank You

Sarah Singh 5 years, 7 months ago

Water maybe but absolutely not murcery as it is a metal

1Thank You

Sailesh Kumar 5 years, 7 months ago

Bromin

1Thank You

Krishana Tyagi 5 years, 7 months ago

Mercury

1Thank You

ANSWER

Pure air and polluted air

Posted by Nandkishore M 5 years, 7 months ago

CBSE > Class 08 > Science

1 answers

Meghna Thapar 5 years, 6 months ago

Pure air is free from harmful pollutants whereas polluted air contains harmful impurities called pollutants.

0Thank You

ANSWER

Mohan while seated on the back bench ,is not able to read the text written on the blackboard clearly Name the defect of vision from which he is suffering

Posted by Pranav Malhotra 5 years, 7 months ago

CBSE > Class 08 > Science

1 answers

Sailesh Kumar 5 years, 7 months ago

Myopia

1Thank You

ANSWER

If you are caught in a thunderstorm accompanied by lightning while crossing an open field, do you think it is right if you lie flat on the ground, that is face downwards ? Justify your answer.

Posted by Manju Gupta 5 years, 7 months ago

CBSE > Class 08 > Science

1 answers

Meghna Thapar 5 years, 6 months ago

If a person is in open space when thunder and lightning begin, and there is no suitable shelter nearby, then the following precautions should be taken:

Stay away from poles or other metal objects.
Never stand under a tree to take shelter during a thunderstorm because there is danger of lightning striking the tree and burning it up.
Never lie down on the ground, instead, squat low on the ground. The person should place his hands on the knees with his head between the hands as this position will make him the smallest target to be struck

0Thank You

ANSWER

What is sirus? Related to stars and solar system

Posted by Kumar Aaditya 5 years, 7 months ago

CBSE > Class 08 > Science