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ANSWER

How is air important to living organism?

Posted by Anawar Hussain 6 years, 4 months ago

CBSE > Class 07 > Science

3 answers

Asmit Maurya 6 years, 4 months ago

Air is important because We were can't survive withour air Earth is only a planet that consists life in our Solar System. When the Ozone layer removed the Earth atmosphere by pollution . O2 is less and less every time .Then the life on Earth is too Difficult

Mukyarla Mallesh 6 years, 4 months ago

If air is not there we can survive if we don't survive we will die so we need air to breathe for all living organisms to breath

Shristi Pallavi 6 years, 4 months ago

Air important for living organism because we breath the air to live

ANSWER

Why there is gaps between the railway tracks??

Posted by Simar Bhatia 6 years, 4 months ago

CBSE > Class 07 > Science

2 answers

Mukyarla Mallesh 6 years, 4 months ago

There are gaps between the railway tracks because when they are moving so they won't Attache if they attach there will be a fire because of attaching the trains we get fire

Tanya Gupta 6 years, 4 months ago

There are gaps between the railway tracks so that when they expand by heat, so railway tracks do not break and there would be no harm to passengers in the train.

ANSWER

What is the meaning of shearing

Posted by Yash Allu 6 years, 4 months ago

CBSE > Class 07 > Science

8 answers

Ved .. 6 years, 4 months ago

The process of removing fleece of an orgainism along with thin layer of skin is known as shearing✌️✌️??

Mukyarla Mallesh 6 years, 4 months ago

Shearing means removing on the body for example ? sheep they take out hair for collecting wool

Rama Krishna 6 years, 4 months ago

Sharing means taking out the fllece from the skin to get wool.

Devendra Gupta 6 years, 4 months ago

Shearing means removel of sheep's hair for collecting Cotton

Simar Bhatia 6 years, 4 months ago

Process of removing dead skin of sheep

Tanu Tuteja Malhan 6 years, 4 months ago

The removal of the fleece of the sheep along with a thin layer of its skin which is dead is called shearing

Yogita Ingle 6 years, 4 months ago

Shearing: It is the process of removal of fleece along with a thin layer of skin from the body of sheep

Yash Allu 6 years, 4 months ago

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4Thank You

ANSWER

Tell the importance of soil ?

Posted by Khemesh Bisen 6 years, 4 months ago

CBSE > Class 07 > Science

1 answers

Yogita Ingle 6 years, 4 months ago

Soil allows the growth of plants. It supplies water and nutrients that are required in the growth of plants.
The soil is the main part of agriculture. Different types of soils support different kinds of crops. Without agriculture, food, shelter and clothing are not possible.
Many microorganisms live in the soil.
Underground water is used for various purposes.

ANSWER

What is the scientific name of american Cockroach ?

Posted by Tanya Gupta 6 years, 4 months ago

CBSE > Class 07 > Science

1 answers

Yogita Ingle 6 years, 4 months ago

The American cockroach, Periplaneta americana, was introduced to the United States from Africa as early as 1625 (Bell and Adiyodi 1981).

ANSWER

If you want to buy a house with Windows but no ventilator. Explain your answer?

Posted by Kavit Attri 6 years, 4 months ago

CBSE > Class 07 > Science

1 answers

Yogita Ingle 6 years, 4 months ago

A house having windows but no ventilators should not be bought. This is because warm air being lighter than cold air, rises up. This warm air can go out of the house mostly through ventilators. If there are no ventilators, then the warm air cannot go out easily.

ANSWER

usually the Factory Waste are disposed by adding basic substances. Give reason

Posted by Shambhu Meenu 6 years, 4 months ago

CBSE > Class 07 > Science

1 answers

.. ... 6 years, 4 months ago

actually factory waste mainly consists of acids and so is too acidic. as we know that when we react an acid with a base we get salt which is also called neutralization reaction. so we add basic substances which make the factory wastes neutralised.

ANSWER

Give short defination of spiracles

Posted by Kapil Verma 6 years, 4 months ago

CBSE > Class 07 > Science

1 answers

Sia ? 6 years, 4 months ago

an external tracheal aperture of a terrestrial arthropod that in an insect is usually one of a series of small apertures located along each side of the thorax and abdomen

ANSWER

How many types of Reproduction are there?

Posted by Surya Basuri 6 years, 4 months ago

CBSE > Class 07 > Science

2 answers

Tanya Gupta 6 years, 4 months ago

Two types of reproductions.

Surya Basuri 6 years, 4 months ago

Two types of reproduction : 1)sexual 2)asexual

ANSWER

Difference between Arabic and anaerobic respiration? And breathing rate while we play football?

Posted by Rama Krishna 6 years, 4 months ago

CBSE > Class 07 > Science

1 answers

Sia ? 6 years, 4 months ago

Aerobic respiration	Anaerobic respiration
1) It takes place in the presence of oxygen.	1) It takes place in the absence of oxygen.
2) It is completed in cytoplasm and mitochondria of cells.	2) It is completed in the cytoplasm only.
3) It involves the complete oxidation of glucose into CO₂ and H₂O .	3) It involves the incomplete oxidation of glucose into CO₂ and alcohol or lactic acid.
4) One molecule of glucose on complete oxidation releases 674 K cals of energy.	4) One molecule of glucose on oxidation releases 28 K cal of energy.
5) The process is harmless.	5) It is toxic to plants.
6) Large amount of energy is released, i.e. 36 ATP molecules per glucose molecule.	6) Small amount of energy is released, i.e. 2 ATP molecules per glucose molecule.

ANSWER

Discuss why wearing more layers of clothing during winter keeps warmer than wearing just one thick piece of clothing

Posted by Ajay Patel 6 years, 4 months ago

CBSE > Class 07 > Science

2 answers

Kamya Singh 6 years, 4 months ago

In winter we use woolen clothes because wool is a poor conductor of heat moreover there is air trapped in between the wool fibres this hair prevents the flow of heat from our body to the cold surroundings so we feel warm.

Ajay Patel 6 years, 4 months ago

Thanks for

ANSWER

What is the scientific name of Cockroach ?

Posted by Tanya Gupta 6 years, 4 months ago

CBSE > Class 07 > Science

2 answers

Tanya Gupta 6 years, 4 months ago

It's Ok

Rama Krishna 6 years, 4 months ago

So many species are the so I can't explain sorry!

ANSWER

Difference between exhaled and inhaled air

Posted by Kavya Kashyap 6 years, 4 months ago

CBSE > Class 07 > Science

1 answers

Rama Krishna 6 years, 4 months ago

Inalation is taking air inside the body and exaltation is releasing air outside the body.

ANSWER

Name a substance which can be purified by crystallisation

Posted by Manvendra Kannaujiya 6 years, 4 months ago

CBSE > Class 07 > Science

1 answers

Kavya Kashyap 6 years, 4 months ago

Crystalline substance can be purified by crystallisation

ANSWER

Which acid is present in lemon

Posted by Swarna Simhadri 6 years, 4 months ago

CBSE > Class 07 > Science

4 answers

Rama Krishna 6 years, 4 months ago

C6H807

Rama Krishna 6 years, 4 months ago

Citric acid

Tanya Gupta 6 years, 4 months ago

Citric Acid

Kavya Kashyap 6 years, 4 months ago

Citric acid

ANSWER

How are thunderstorms caused?

Posted by Lakshmi Tamminaina 6 years, 4 months ago

CBSE > Class 07 > Science

1 answers

Sia ? 6 years, 4 months ago

During the development of a thunderstorm, the air currents move upward while the water drops move downward. These movements cause separation of charges. The positive charges collect near the upper edges of the clouds and negative charges accumulate near the lower edges. There is accumulation of positive charges near the ground also. When the amount of accumulated charges becomes very large, the air which is normally a poor conductor of electricity, is no longer able to resist their flow. Negative and positive charges meet, producing streaks of bright light and sound. This process is called an electric discharge. The process of electric discharge can occur between two or more clouds or between clouds and the earth. In this way thunderstorm is caused.

ANSWER

MCQes

Posted by Ishmit Shukla 6 years, 4 months ago

CBSE > Class 07 > Science

1 answers

Tanya Gupta 6 years, 4 months ago

Of which book ? Of which subject ? Of which chapter ?

ANSWER

What is the difference of acid and becik

Posted by Om Prakash 6 years, 4 months ago

CBSE > Class 07 > Science

3 answers

Ekam Soni 6 years, 4 months ago

Aise and base first acid taste of acid is sour it contain H plus hydrogen i n o acid turn blue Litmus Paper into rate are ready

Yogita Ingle 6 years, 4 months ago

Acid	Bases
1. Acids are sour in taste 2. The chemical nature of such substances is acidic. 3. Acid turns blue litmus red. 4. Acids are generally found in Vinegar, Curd, Spinach, Amla, Citrus fruits, Tamarind, grapes, unripe mangoes, Citrus fruits such as oranges, lemons, etc. 5. Acids do not react with ammonium salt 6. Do not absorb carbon dioxide gas	Bases are bitter in taste and soapy to touch. The nature of such substances is said to be basic. Bases turn red litmus blue Bases are generally found in lime water, soap, window cleaner, Milk of Magnesia Reacts with ammonium salt to give ammonia gas Some bases like NaOH absorbs carbon dioxide gas

Ishant Gedam 6 years, 4 months ago

Acid: Acid taste sour. Acid turns blue litmus red. Acid is a substance contains (hydrogen ion). Base: Base taste bitter. Base turns blue litmus red. Base is a substance contains (hydroxyl ion).

ANSWER

In which places humidity is more ?

Posted by Lata Pandey 6 years, 4 months ago

CBSE > Class 07 > Science

1 answers

Sia ? 6 years, 4 months ago

Tropical seashores, such as Southeast Asia , the Congo river, and coastal cities worldwide.

ANSWER

Explain the process of conversation using a lighted candle

Posted by Ark Pasawala 6 years, 4 months ago

CBSE > Class 07 > Science

1 answers

Yogita Ingle 6 years, 4 months ago

The different zones of a candle flame can be described as follows:

1. The innermost zone: The innermost zone is the zone which is formed just around the wick of the candle flame as the candle burns. It is also known as dark zone of the flame. It consists of hot, unburnt vapours of the combustible material. There is no air present here. It is the least hot of all the zones.

2. Middle zone: The middle zone also known as luminous zone is the zone which is moderately hot with limited oxygen supply. Hence, the fuel vapours burn partially and produce carbon particles. These particles then leave the flame as smoke and soot. This zone is the major part of the flame. The colour of this zone is yellow.

3. The outermost zone: The outermost zone also known as non-luminous zone is the zone of complete combustion. The ample presence of oxygen (or air) aids in complete combustion. It is the hottest zone of the candle flame and does not produce much light. It is blue in colour.

ANSWER

Who discovered cell?

Posted by Diya Talwar 6 years, 4 months ago

CBSE > Class 07 > Science

4 answers

Diya Talwar 6 years, 4 months ago

Thanks for answering

Tanya Gupta 6 years, 4 months ago

Robert Hooke

Diya Talwar 6 years, 4 months ago

Thanks for answering?

Omm Night Hunter 6 years, 4 months ago

Robot hook

ANSWER

State the path of flow of deoxygenated blood in human circulatry system?

Posted by Ramesh Kalirawan 6 years, 4 months ago

CBSE > Class 07 > Science

1 answers

Jidnyali Badgujar 6 years, 4 months ago

Se 23e

ANSWER

How the thermometer constrated

Posted by Suryakant Kemdarne 6 years, 4 months ago

CBSE > Class 07 > Science

2 answers

Parul Sharma 6 years, 4 months ago

Faren

Jidnyali Badgujar 6 years, 4 months ago

Faren

ANSWER

Lust the differences between clay soil and sandy soil

Posted by _Sontu_ , Shark******* Ch 6 years, 4 months ago

CBSE > Class 07 > Science

1 answers

Gaurav Seth 6 years, 4 months ago

Clayey soil =>

1.The proportion of fine particle is higher.
2.Particles are packed tightly.
3.It can hold good amount of water.
4.Water can not drain quickly.
5.It is heavy in weight.
6.Less air is trapped between the particles.
7.It is rich in humus.

Sandy soil =>

1.The proportion of large particles is higher.
2.Particles are loosely packed.
3.Its ability to retain water is low.
4.Water can drain quickly.
5.It is light in weight.
6.More air is trapped between the particles.
7.It is not rich in humus.

ANSWER

Which part of the black sheep have wool

Posted by Chabilal Lal 6 years, 4 months ago

CBSE > Class 07 > Science

8 answers

Sehaj Kandiare 6 years, 4 months ago

Skin Hair

Ekam Soni 6 years, 4 months ago

Skin

Dhruva A 6 years, 4 months ago

Body of ?

Chandan Singh 6 years, 4 months ago

Fleece or hair?

Parul Sharma 6 years, 4 months ago

Fleece

Jidnyali Badgujar 6 years, 4 months ago

The hairy skin

Vinny Jhorar 6 years, 4 months ago

The hairy skin

Satish Kumar 6 years, 4 months ago

All part

ANSWER

Explain the activity to demonstrate electrostatic force between two bodies

Posted by Keshav Mundhe 6 years, 4 months ago

CBSE > Class 07 > Science

1 answers

Meghna Thapar 5 years, 6 months ago

Lightning is another example of electrostatic forces in everyday life, but is shown on a massive scale. When clouds rub against each other and the particles will gain a charge, and these charges want to equalise. As the wool wants to equalise its charge this is the noise and slight zap that occurs. Electrostatic force is the force two electric charges exert on each other. It operates according to Coulombs law, which states that the electrostatic force between two charges is equal to the multiplication of the magnitude of the charges divided by the square of the distance between them.

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.