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Why it warmer in cloudy weather than in clear sky

Posted by Onkar Padale 6 years, 5 months ago

1 answers

Sia ? 6 years, 5 months ago

We know that earth absorbs heat in day and radiates at night. When sky is covered, with clouds, the heat radiated by earth is reflected back and earth becomes warmer. But if sky is clear the heat radiated by earth escapes into space.

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What is villi? What is there location and function?

Posted by Sarika Abhang 6 years, 5 months ago

CBSE > Class 07 > Science

2 answers

Chandan Singh 6 years, 5 months ago

Finger like outgrowth in small intestine

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Pooja Kohli 6 years, 5 months ago

Villi are the fine fingerlike projections present on the inner wall of small intestine. The have blood vessal ,s on them that absorb nutrients present in the food we eat

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My subjects

Posted by Durga Labhana 6 years, 5 months ago

CBSE > Class 07 > Science

0 answers

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Why do we have hair . Can u say with what material is it made from

Posted by Manohar Rao G 6 years, 5 months ago

CBSE > Class 07 > Science

1 answers

Sia ? 6 years, 5 months ago

For early humans, hair kept them warm, protected them from cuts and scrapes, provided camouflage, and even served as a nice handhold for the young.
Hair is made of a tough protein called keratin.

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State differences between acids and bases.

Posted by Saidi Sunchu 6 years, 5 months ago

CBSE > Class 07 > Science

1 answers

Manohar Rao G 6 years, 5 months ago

Acids are harmful and corrosive Base are bitter and soapy

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What precaution should you follow using lab thermo (ch-4 Heat)

Posted by Rohan Mandal 6 years, 5 months ago

CBSE > Class 07 > Science

2 answers

Kumkum Kumari 6 years, 5 months ago

1 The thermometer should be held vertically while measuring temperature. 2 The bulb of the thermometer must be surrounded by all the sides by the substance whose temperature is to be measured. 3 The thermometer should not held by the bulb. 4 The thermometer should be handed with great care.

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Manohar Rao G 6 years, 5 months ago

The bulb of the thermometer should not touch the surface of the container. The temperature of the liquid should be read in the liquid itself, as it doesn't have Kink

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The tiny pores present on the surface of the leaf

Posted by Rathi Balamurugan 6 years, 5 months ago

CBSE > Class 07 > Science

5 answers

Madiha Fatima 6 years, 5 months ago

Stomata

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Kumkum Kumari 6 years, 5 months ago

Stomata

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Ridhima Kewda 6 years, 5 months ago

Obviously Stomata

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Chandan Singh 6 years, 5 months ago

Stomata

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Rohan Mandal 6 years, 5 months ago

Stomata

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Water is a conductor or insulator of electricity

Posted by Sanchita Sharma 6 years, 5 months ago

CBSE > Class 07 > Science

1 answers

Ridhima Kewda 6 years, 5 months ago

Insulator as it does not allow electricity to pass through them

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What are nutrition?

Posted by Shruti Kamble. 6 years, 5 months ago

CBSE > Class 07 > Science

2 answers

Jashmeet Kaur 6 years, 5 months ago

We take nutrition for good health and for reparing our body parts it is called nutrition

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Divya Saini 6 years, 5 months ago

The process of taking in food & it's utilisation in the body is called nutrition

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Why is cellulose rich food a good source of roughage

Posted by Anjali Patil 6 years, 5 months ago

CBSE > Class 07 > Science

1 answers

Yogita Ingle 6 years, 5 months ago

Cellulose-rich food substances are good source of roughage in human beings because
(a) human beings do not have cellulose-digesting enzymes.
(b) cellulose gets absorbed in the human blood and converts into fibres.
(c) the cellulose-digesting bacteria convert cellulose into fibres.
(d) cellulose breaks down into smaller components which are egested as roughage.

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What is alkaline

Posted by Gauri Singh 6 years, 5 months ago

CBSE > Class 07 > Science

1 answers

Meghna Thapar 5 years, 10 months ago

Alkaline refers to an aqueous solution having a pH greater than 7. An alkaline solution is also known as basic solution.

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Rahul and Preeti were eating their food hurriedly so that they could go out and play during the break period. Suddenly, Rahul started coughly violently. Think of the reason why he was coughing.

Posted by Vidya Swaminathan 6 years, 5 months ago

CBSE > Class 07 > Science

0 answers

ANSWER

what are guard cells

Posted by Jiya Tayal 6 years, 5 months ago

CBSE > Class 07 > Science

2 answers

Divya Saini 6 years, 5 months ago

The cells which surround stomata .

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Chandan Singh 6 years, 5 months ago

Guard cell like 2 guard

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Explain digestion in human

Posted by Om Prakash Nishad 6 years, 5 months ago

CBSE > Class 07 > Science

1 answers

Chandan Singh 6 years, 5 months ago

Human take food from mouth,salivarygland contain saliva that convert starch into sugar .food go to oeshophagus and later go to stomach for digested juices and now food go to small intestine and small intestine recives juices from liver and pancreas ,beside its walls also secrete juices and the food go to **** from large intestine and the waste food go outside.

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An artificial satellite travels at a speed of 20000 m/s . Express this speed

Posted by Faiz Mohammad Raza 6 years, 5 months ago

CBSE > Class 07 > Science

0 answers

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__________ is one billonndth of second. 2. What is the SI unit of a speed

Posted by Aditi Kulkarni 6 years, 5 months ago

CBSE > Class 07 > Science

2 answers

Sneha A. 6 years, 5 months ago

Yep

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Sia ? 6 years, 5 months ago

1. 1 nanosecond
2. meter per second.

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Time between sunrise and next sunrise was called as ________ .

Posted by Aditi Kulkarni 6 years, 5 months ago

CBSE > Class 07 > Science

3 answers

Aditi Kulkarni 6 years, 4 months ago

Actually it is day

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Sneha A. 6 years, 5 months ago

Twilight

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Sia ? 6 years, 5 months ago

Twilight

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What why the Why do the whole fibre have a great book as compact to other fibre

Posted by Amil Hussain 6 years, 5 months ago

CBSE > Class 07 > Science

0 answers

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Which is strongest acid and strongest base

Posted by Harshiv Patel 6 years, 5 months ago

CBSE > Class 07 > Science

1 answers

Tripti Rawat 6 years, 5 months ago

The world's strongest superacid is fluoroantimonic acid, HSbF6.
Sodium Hydroxide(caustic soda) is the most basic compound and so has a PH of 14.

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Bacteria present in rumen

Posted by Chandan Singh 6 years, 5 months ago

CBSE > Class 07 > Science

1 answers

Sia ? 6 years, 5 months ago

Reticulorumenal microbes

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Define assimlition in less word

Posted by Chandan Singh 6 years, 5 months ago

CBSE > Class 07 > Science

1 answers

Sia ? 6 years, 5 months ago

Assimilation is the process of taking in and fully understanding information or ideas.

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What is the life cycle of silkworm?

Posted by Arjit Kumar 6 years, 5 months ago

CBSE > Class 07 > Science

1 answers

Sia ? 6 years, 5 months ago

Life Cycle – Silk Moth: Actually silkworms are not worms, but the larvae or caterpillars hatched from the eggs of the silk moth. The life history of a silk moth starts when a female silk moth lays eggs.
The larvae or caterpillars hatched from the eggs of the silk moth. These silkworms feed on fresh mulberry leaves the silkworm grows in size and then becomes a pupa.
In the pupa stage, it weaves a net to hold itself. It then swings its head from side to side, secreting a fibre that hardens on contact with air. This fibre is made of a protein and becomes the silk fibre.
The caterpillar covers itself completely with silk fibre and turns into a pupa, this covering is known as the cocoon. The moth continues to develop within the cocoon. The silk thread or yarn is obtained from the silk moth’s cocoon.
Egg→ Larva or caterpillar → Pupa → Adult.

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what do organisms need to take food

Posted by Muskan Ramgarhia 6 years, 5 months ago

CBSE > Class 07 > Science

3 answers

Sia ? 6 years, 5 months ago

Organisms need food to obtain energy for various metabolic activities and to maintain the body parts for wear and tear. It also provides nutrients for protection against the disease.

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Harshiv Patel 6 years, 5 months ago

To do metabolic activity To grow To repair damage cells

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Chandan Singh 6 years, 5 months ago

Organisms need food for build their bodies,for growth, for repair damaged part and for carry out life process

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Test of chapter 1 nutrition in plant ch 4 heat ch 5 acid base and salt

Posted by Sona Chauhan 6 years, 5 months ago

CBSE > Class 07 > Science

1 answers

Vaishali Mane 6 years, 5 months ago

question and answer of lesson no. 4

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Define : Celsius scale

Posted by Jaskirat Kaur 6 years, 5 months ago

CBSE > Class 07 > Science

1 answers

Sia ? 6 years, 5 months ago

Celsius scale is a scale of temperature in which 0° represents the melting point of ice and 100° represents the boiling point of water.

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Which id

Posted by Kanchan Keram 6 years, 5 months ago

CBSE > Class 07 > Science

0 answers

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Temperature

Posted by Tunnu Chauhan 6 years, 5 months ago

CBSE > Class 07 > Science

2 answers

Vidya Swaminathan 6 years, 5 months ago

Define of Temperature : the measure of degree of hotness or coldness of a body.

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Arpita Singh 6 years, 5 months ago

Tem. defini the measurements of hot and cool object

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Why doctor dips the thermometer in a liquid before use

Posted by Jaskirat Kaur 6 years, 5 months ago

CBSE > Class 07 > Science

1 answers

Yogita Ingle 6 years, 5 months ago

It is because it is a antiseptic . The doctor checks the temperature of patients suffering from fever. It may have germs . Therefore the doctor dips the thermometer in liquid before use.

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H2o

Posted by Akhilesh Kumar 6 years, 5 months ago

CBSE > Class 07 > Science