CBSE > Class 10 > Science | CBSE Board | Homework Help

"# For science "# See if you have studied ncert very well then you can study from a reference book for better practice .. Lakhmir Singh and Manjit Kaur is a very good book for explaination and has a detailed information of all topics and an ample of questions.. Xam idea is also a good choice as it has all imp. Questions and also contains Ncert exemplar imp. Questions.. Oswal question bank is too a good choice..it also contains ample of questions So, if u want for explanation then lakhmir singh and manjit kaur u can take And for extra practice xam idea or oswal. But my first advice is that you study ncert very carefully and then solve the reference book. Hope it helps.

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Riya Philip 5 years, 3 months ago

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Aprita Pal 5 years, 3 months ago

Schand and osswal both

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Aniket Kumar 5 years, 3 months ago

Educart is the best for 2021 board exam

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Life Is Full Of Struggle 5 years, 3 months ago

exam idea

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What is respiratoin

Posted by Manish . 5 years, 3 months ago

CBSE > Class 10 > Science

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Aparna Kumari 5 years, 3 months ago

Process of breakdown of (oxidation)food to release energy is called respiration.

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Riya Philip 5 years, 3 months ago

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Aniket Kumar 5 years, 3 months ago

The process of breakdown of complex molecules to simple molecules to release energy is called respiration.

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Topic : CONSERVATION OF NATURAL RESOURCES Ref: NCERT Science Text Book Ch.14 - Sources of Energy Ch.16 -Management of Natural Resources Assignment

Posted by Saniya H 5 years, 3 months ago

CBSE > Class 10 > Science

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Riya Philip 5 years, 3 months ago

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What are sign convensions of mirror

Posted by Renukesh Y 5 years, 3 months ago

CBSE > Class 10 > Science

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Riya Philip 5 years, 3 months ago

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Explain the functioning of heart

Posted by Harshit Bhandekar 5 years, 3 months ago

CBSE > Class 10 > Science

2 answers

? Yang ? 5 years, 3 months ago

The heart functions in the following ways: ●The arteries receive oxygenated blood from the heart and supply it throughout the body. Whereas, the veins carry the deoxygenated blood from all the body parts to the heart for oxygenation. ●The right atrium receives blood from the veins and pumps it to the right ventricle. ●The right ventricle pumps the blood received from the right atrium to the lungs. ●The left atrium receives oxygenated blood from the lungs and pumps it to the left ventricle. ●The left ventricle pumps the oxygenated blood throughout the body. ☆Improper functioning of the heart results in heart diseases such as angina pectoris, congestive heart failure, cardiomyopathy, cardiac arrest, etc. HOPE IT HELPS YOU?✌

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Riya Philip 5 years, 3 months ago

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What is the function of blood capilarries

Posted by Harish Ar 5 years, 3 months ago

CBSE > Class 10 > Science

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Akshita Akshita 5 years, 3 months ago

It helps in the supply of blood

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? Yang ? 5 years, 3 months ago

CAPILLARIES: On reaching tissues, arteries branch further into extremely thin tubes called capillaries. "Capillaries bring about the exchange of substances between blood and tissues". HOPE IT HELPS YOU?✌

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Compare the above system with the probable systems in hilly/mountainous areas or plains or plateau regions

Posted by Harish Ar 5 years, 3 months ago

CBSE > Class 10 > Science

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Riya Philip 5 years, 3 months ago

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What is dna?, Dna full form

Posted by Syed Mohd Hasan 5 years, 3 months ago

CBSE > Class 10 > Science

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Kedar Thakur 5 years, 3 months ago

DNA is deoxyribonucleic acid that helps in carrying genes or heriditery materials from the parent to the offsprings.

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Karthihesh G V 5 years, 3 months ago

Dna is deoxyribonucleic acid which helps out in carrying the gene from the parents to their reproductive species

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? Yang ? 5 years, 3 months ago

DNA: Deoxyribonucleic Acid.“DNA is a group of molecules that is responsible for carrying and transmitting the hereditary materials or the genetic instructions from parents to their offsprings.” HOPE IT HELPS YOU?✌

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Riya Philip 5 years, 3 months ago

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Ajin Ajin 5 years, 3 months ago

Deoxyribonucleic Acid (DNA) = En Español. DNA is the chemical name for the molecule that carries genetic instructions in all living things this is your answer

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What is the position of the image when the object is placed at a distance of 10 cm of the convex lens and focal length is 10 cm. Pls answer logically without using lens formula.

Posted by Samruddhi Br 5 years, 3 months ago

CBSE > Class 10 > Science

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Riya Philip 5 years, 3 months ago

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Why variations take place in DNA copying??

Posted by Account Deleted 5 years, 3 months ago

CBSE > Class 10 > Science

2 answers

Pranjal Varshney 5 years, 3 months ago

What is corrosion?

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Riya Philip 5 years, 3 months ago

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Full form of IPSFC

Posted by Sandhya Kumari 5 years, 3 months ago

CBSE > Class 10 > Science

2 answers

Maahi ......♾ 5 years, 3 months ago

International Pacific Salmon Fisheries Commission.

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Why millet is called coarse grain

Posted by Akshita Akshita 5 years, 3 months ago

CBSE > Class 10 > Science

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Riya Philip 5 years, 3 months ago

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Yogita Ingle 5 years, 3 months ago

Millets are type of grains which are have high value of nutrition and protein in it. Examples : Bajra, Ragi and Jowar.

Millets are also known as coarse grains. It is because their surface is not so smooth. Coarse means 'rough'. Millets have surface which are rough. So they are termed as coarse grains.

Like wheat and rice, they do are not fine grains. They are coarse type or rough type grains.

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List 7 pair of characters studied by Mendel.

Posted by Asifa Naaz 5 years, 3 months ago

CBSE > Class 10 > Science

3 answers

? Yang ? 5 years, 3 months ago

1) STEM HEIGHT: Tall & Dwarf. 2) FLOWER COLOUR: Violet & White. 3) FLOWER POSITION: Axial & Terminal. 4) POD SHAPE: Inflated & Constricted. 5) POD COLOUR: Green & Yellow. 6) SEED SHAPE: Round & Wrinkled. 7) SEED COLOUR: Yellow & Green. HOPE IT HELPS YOU?✌

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Yogita Ingle 5 years, 3 months ago

There were 7 characters of the pea plant which were selected by Mendel for the experiments. The characters which were chosen by Mendel for his study were stem height, flower colour, flower position, pod shape, pod colour, seed shape, seed colour. All these characters belong to different chromosomes in the pea plant.

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Define variation and give its importance?

Posted by Asifa Naaz 5 years, 3 months ago

CBSE > Class 10 > Science

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Riya Philip 5 years, 3 months ago

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Yogita Ingle 5 years, 3 months ago

Variation can be defined as the difference between the cells, organisms or group of organisms belonging to a particular species by environmental factors (phenotypic variation) or genetic differences (genotypic variations).
It is caused by gene mutations due to certain environmental factors and various combinations of genetic material.
Variation is important because it causes evolution and is the basis of heredity.
It is advantageous to a population as it enables few individuals to adapt to the environment changes thus, enabling the survival of the population.

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Define genetics and heredity.

Posted by Asifa Naaz 5 years, 3 months ago

CBSE > Class 10 > Science

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Riya Philip 5 years, 3 months ago

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Does Variation helps in evolution?

Posted by Rajveer Soni 5 years, 3 months ago

CBSE > Class 10 > Science

4 answers

Sakshi Kori 5 years, 3 months ago

Yes it helps in evolution

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? Yang ? 5 years, 3 months ago

"YES". hope it helps you?✌

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Riya Philip 5 years, 3 months ago

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Ankit Raj 5 years, 3 months ago

Yes

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Observe the following chemical changes occurring around us in daily life and identify type of reaction in each case. 1) Burning of candle gives carbon dioxide. 2) During whitewashing walls when quicklime is added to water drum become warm. 3) Digestion of food gives energy.

Posted by Ananta Pant 5 years, 3 months ago

CBSE > Class 10 > Science

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Riya Philip 5 years, 3 months ago

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Ankit Raj 5 years, 3 months ago

1) Chemical reaction 2) Chemical reaction 3) Chemical reaction

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How to know that this chemical equation is precipate????

Posted by Account Deleted 5 years, 3 months ago

CBSE > Class 10 > Science

5 answers

Bhavya Jain 5 years, 3 months ago

When the solid substance does not dissolve in water

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Sahil Lokhande 5 years, 3 months ago

What is Precipitat?

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Twinkle Chandel 5 years, 3 months ago

A solid substance which does not dissolve in solution is called precipata

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Lomror ? 5 years, 3 months ago

Precipitate is a white insoluble solid Sub & it mainly it settles down in aqueous sol.

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Anjali Prajapati 5 years, 3 months ago

Precipate is a non soluble chemical and setle down in an (aq) solution

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How to know that, this Or which equation is in which physical states(liquid, solid, gas, aqueous)???

Posted by Account Deleted 5 years, 3 months ago

CBSE > Class 10 > Science

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Riya Philip 5 years, 3 months ago

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Difference between fission and budding in points

Posted by Dr. A. S. Haider 5 years, 3 months ago

CBSE > Class 10 > Science

2 answers

Ankit Raj 5 years, 3 months ago

Fission means the repeated division of one cell to develop two or more cell. Budding means the development of new young ones through buds(outgrowth) that are produced as a part of its parent and after sometime it gets separated from its parent in order to grow.

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Riya Philip 5 years, 3 months ago

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A doctor has prescribed a corrective lens of power -1.5 D. Find the focal length of the lens. Is the prescribed lens is divergent or converging

Posted by Preeti Senapati 5 years, 3 months ago

CBSE > Class 10 > Science

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Kedar Thakur 5 years, 3 months ago

P = 1/f f = 1/P f = 1/- 1.5 f = -0.6666 f = -0.67

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Riya Philip 5 years, 3 months ago

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Yogita Ingle 5 years, 3 months ago

P = -1.5 D

P = 1/f

f = 1/P = 1/(-1.5) = -0.666 m = -67 cm

Since focal length is negative, it is a diverging lens.

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Two thin lenses of power + 3.5 d and -2.5 d are placed in contact. Find the power and focal length of the lens combination

Posted by Preeti Senapati 5 years, 3 months ago

CBSE > Class 10 > Science

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Riya Philip 5 years, 3 months ago

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What are the sign convention for reflection by sperical mirrors?

Posted by Anshuman Omm 5 years, 3 months ago

CBSE > Class 10 > Science

2 answers

Yogita Ingle 5 years, 3 months ago

Cartesian Sign Convention: In the case of spherical mirror all signs are taken from Pole of the spherical mirror, which is often called origin or origin point. This sign convention is known as New Cartesian Sign Convention.

Sign is taken as + (positive) behind the spherical mirror. For example if an image is formed behind the mirror, the distance of image is taken as + (positive) from pole along the principal axis.
The height of is taken as + (positive) above the principal axis and taken as – (negative) below the principal axis.

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Riya Philip 5 years, 3 months ago

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Advantage of parallel circuit

Posted by Venkataramana Shenoy 5 years, 3 months ago

CBSE > Class 10 > Science

2 answers

Yogita Ingle 5 years, 3 months ago

1. Parallel circuits provide the same voltage to every source and appliance in the circuit, thus all appliances work efficiently.

2. In a parallel circuit if one appliance is fused, the current continues to flow through the others. Hence other appliances continue to work.

3. The equivalent resistance in the parallel connection of resistors decreases thus, more current than one source can produce is obtained. Unless all appliances in parallel have the same voltage, current would flow from one source into the other. This will result in loss of power.

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Riya Philip 5 years, 3 months ago

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What is mean by electrolytic reduction?

Posted by [email protected] Jayanthi 5 years, 3 months ago

CBSE > Class 10 > Science

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Sahil Lokhande 5 years, 3 months ago

Electrolyte is a process in which pass electric current in metals to define the pure form of metal

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? Yang ? 5 years, 3 months ago

Electrolytic Reduction: It is defined as the electrolysis process which is used to extract metals from molten chloride or oxides. In Electrolytic Reduction, the particles of the metals gets collected at cathode and the particles of oxygen and chlorine at anode. HOPE IT HELPS YOU?✌

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Riya Philip 5 years, 3 months ago

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Riya Philip 5 years, 3 months ago

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Amrita Kumari 5 years, 3 months ago

Electrolytic reduction is defined as the electrolysis process which is use to extract metals from molten chloride or oxides. In Electrolytic reduction, the particles of the metals gets collected at cathode and the particles of oxygen and chlorine at anode.

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Activity 3.1

Posted by Dhanush Reddy 5 years, 3 months ago

CBSE > Class 10 > Science