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The exception to this rule is found in the pulmonary arteries, which carry deoxygenated blood away from your heart to your lungs, where it will become oxygenated before returning to your heart through the pulmonary veins.

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CHEMICAL CHANGE EXAMPLE

Posted by Adil Shaikh 8 years, 2 months ago

CBSE > Class 07 > Science

1 answers

Tushar Das 8 years, 2 months ago

Put citric acid in a glass and add salt on it .It will turn into blue colour

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Why heat go from low to high

Posted by Ashlesha Ahire Ashlesha 8 years, 2 months ago

CBSE > Class 07 > Science

1 answers

Tushar Das 8 years, 2 months ago

Because heat are immortal substances

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Why doesn't the moon fall?

Posted by Sanjana Rajesh 8 years, 2 months ago

CBSE > Class 07 > Science

2 answers

Tushar Das 8 years, 2 months ago

Because in space their is high gravity and the moon did not come closer to earth

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Sanjana Rajesh 8 years, 2 months ago

So the moon "falls" toward Earth due to gravity, but doesn't get any closer to Earth because its motion is an orbit, and the dynamics of the orbit are determined by the strength of gravity at that distance and by Newton's laws of motion. Moon is continuously falling towards earth but missing all the time

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Facebook

Posted by Karan Kumar 8 years, 2 months ago

CBSE > Class 07 > Science

1 answers

Jyoti Sehrawat 8 years, 2 months ago

Chere ki kitab is called Facebook

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differenciate between aerobic and anaerobic respiration

Posted by Sanskruti Akolkar 8 years, 2 months ago

CBSE > Class 07 > Science

1 answers

Kritika Trehan 8 years, 2 months ago

Aerobic Respiration	Anaerobic Respiration
Definition	Uses oxygen to breakdown glucose in the body	Uses a respiratory electron transport chain but does not use oxygen as the electron acceptors.
Cells that use it	Aerobic respiration occurs in most cells.	Anaerobic respiration occurs in bacteria, yeasts, some prokaryotes, erythrocytes (red blood cells), and in muscle cells.
Lactic Acid	Does not produce lactic acid	Produces lactic acid
By Products	Carbon dioxide, water, energy	Lactic acid, energy, ethanol, carbon dioxide
Stages	Glycolysis, Krebs cycle, Electron Transport Chain	Glycolysis, Fermentation
Amount of Energy released	2900 kJ/mol of glucose	120 kJ/mol of glucose

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Burning of paper is a chemical change. Give reason s.

Posted by Siddharth Sarda 8 years, 2 months ago

CBSE > Class 07 > Science

1 answers

Kritika Trehan 8 years, 2 months ago

When paper is burnt, it forms a completely new substance i.e. carbon in the form of ash. Hence burning of paper is a chemical change.

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What's 2 functions of stomata

Posted by Ahana Samanta 8 years, 2 months ago

CBSE > Class 07 > Science

2 answers

Anju Kumari 8 years, 2 months ago

It help in transportation It help in exchange of gases

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Kritika Trehan 8 years, 2 months ago

There are small openings on the lower surface of the leaves. These pores are called stomata. These openings are surrounded with guard cells.

Functions of stomata:

1. It helps in the transpiration of water, i.e., the loss of excess water from the plant.

2. Loss of water from the stomata creates an upward pull, i.e., suction pull which helps in absorption of water from the roots.

3. They help in exchange of gases.

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Which is more electronegative...... I K Mn Na

Posted by Md Yasin 8 years, 2 months ago

CBSE > Class 07 > Science

0 answers

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What is lactic acid

Posted by Shiv Narain 8 years, 2 months ago

CBSE > Class 07 > Science

1 answers

Kritika Trehan 8 years, 2 months ago

Lactic acid is an organic compound with the formula CH3CH(OH)COOH. In its solid state, it is white and water-soluble. In its liquid state, it is colorless. It is produced both naturally and synthetically.

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What is the colour of :- a) live wire b) neutral wire c) earth wire

Posted by Jugaajyoti Dash 8 years, 2 months ago

CBSE > Class 07 > Science

1 answers

Kritika Trehan 8 years, 2 months ago

Live Wire: Red /Black

Neutral Wire: Blue

Earth Wire: Green

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Why the camel has thick skin?

Posted by Jugaajyoti Dash 8 years, 2 months ago

CBSE > Class 07 > Science

1 answers

Kritika Trehan 8 years, 2 months ago

This stored energy supply can keep the camel alive for 3 weeks without water. The camel sweats. Its coarse body hair, which also protects the animal from the sun, allows it to sweat. The camel's fur does not only protect the animal from the climatic conditions, but also eliminates the loss of water from the body.

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Explain instruments for measuring time

Posted by Purvi Bhardwaj 8 years, 2 months ago

CBSE > Class 07 > Science

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What is light.

Posted by Ruvab Johar 8 years, 2 months ago

CBSE > Class 07 > Science

1 answers

Ruvab Johar 8 years, 2 months ago

Light is the energy which helps us to see

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Microbes are good as well as bad for . Justify this statement in the light of the products of their respiration.

Posted by Anita Sneha 8 years, 2 months ago

CBSE > Class 07 > Science

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Microbes are good as well as bad for us . Jutify this statement in the light of the prouducts of their resporation

Posted by Anita Sneha 8 years, 2 months ago

CBSE > Class 07 > Science

1 answers

Anita Sneha 8 years, 2 months ago

Gufi

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What is tje valency of iron in each case FeO Fe2O3(2&3 are subscripts) ?

Posted by Nishant Arunshwetha 8 years, 2 months ago

CBSE > Class 07 > Science

1 answers

Nishant Arunshwetha 8 years, 2 months ago

2 In first case and 3 in second case

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Posted by Afreen Arif 8 years, 2 months ago

CBSE > Class 07 > Science

2 answers

Sidhart Sharma 8 years, 2 months ago

Lithium

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Ruvab Johar 8 years, 2 months ago

It is not a question

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Describe heart

Posted by Aditya Singh 8 years, 2 months ago

CBSE > Class 07 > Science

1 answers

Ronak Kajala 8 years, 2 months ago

Heart is pump blood without stopping . It has four chambers-Right atrium ,Right ventricle, Left atrium and Left ventricle.It has veins, capallaries,arteries and Blood platlets.

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What is microbiology

Posted by Sachin Singh 8 years, 2 months ago

CBSE > Class 07 > Science

1 answers

Jothir Harish 8 years, 2 months ago

Stuy of micro organisme

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Have all fruits breathe with lenticels

Posted by Eeshita Grover 8 years, 2 months ago

CBSE > Class 07 > Science

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What is the shape of heart?

Posted by Sneha Agarwal 8 years, 2 months ago

CBSE > Class 07 > Science

2 answers

Anju Kumari 8 years, 2 months ago

I don't know the shape but I know that it is of the size of the fist

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Jothir Harish 8 years, 2 months ago

irregular shape

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Neutralisation reaction

Posted by Nandini Goyal 8 years, 2 months ago

CBSE > Class 07 > Science

1 answers

Varun Banda 8 years, 2 months ago

Reaction in which acids reacts with base to give salt and water is called neutralisation reaction. Ex:HCl+NaOH....NaCl+H₂O..

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How do we vomit?

Posted by Shivanshu Shukla 8 years, 2 months ago

CBSE > Class 07 > Science

1 answers

Kritika Trehan 8 years, 2 months ago

heart is a muscular organ that pumps blood to your body. Your heart is at the center of your circulatory system. This system consists of a network of blood vessels, such as arteries, veins, and capillaries. These blood vessels carry blood to and from all areas of your body.

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What is weather?

Posted by Shivanshu Shukla 8 years, 2 months ago

CBSE > Class 07 > Science