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Echo: When a sound wave is produced in air, some of it is absorbed after hitting with a reflector while some of the sound wave is reflected back to the listener. This reflected sound is called echo.
Applications of Echo:
1. Since bats cannot see from their eyes, so they use the technique of echolocation to locate their ways. Bats can understand from the reflected sound if there is any object before it. It hunts its prey by using this technique.
2. This technique is also used to find the depth of sea or distance of submarines.
3. It also helps to estimate the distance or hills and mountains.
4. This technique is also very helpful in the medical field as well. Doctors used this phenomenon in cardiography, sonogram and many other medical diagnosis.

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What is solar system?

Posted by Yogesh Gupta 7 years, 10 months ago

CBSE > Class 08 > Science

1 answers

Silvia Disusa 7 years, 10 months ago

The collection of eight planets and their moons in the orbit around the sun

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What is metamorphosis?Give examples

Posted by Nand Kansara 7 years, 10 months ago

CBSE > Class 08 > Science

3 answers

Drishti Singh 7 years, 10 months ago

The transformatim from an egg of a frog to an adult through drastic changes is metamorphisis

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Ishani Raizada 7 years, 10 months ago

For example Life cycle of frog

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Ishani Raizada 7 years, 10 months ago

The series of changes in an organism during its life cycle that transformes it from larva to an adult through drastic changes.

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Division of cytoplasm is called

Posted by Rithul Ramesh 7 years, 10 months ago

CBSE > Class 08 > Science

1 answers

Ajay Panwar 7 years, 10 months ago

Salle

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What is kyoto protocol

Posted by Ritika Upadhyay 7 years, 10 months ago

CBSE > Class 08 > Science

0 answers

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Difference between flammable and inflammable substances??.

Posted by Jishnu Manoj 7 years, 10 months ago

CBSE > Class 08 > Science

1 answers

Jiya Khandelwal 7 years, 10 months ago

Inflammable means substance which catch fire easily Flammable means which does not catch fire easily (At room temperature)

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Which part of human body doesn't receive blood

Posted by Yamin Shafi 7 years, 10 months ago

CBSE > Class 08 > Science

4 answers

Lakshya Kumar 7 years, 10 months ago

Hello

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Aditya Bhadoria 7 years, 10 months ago

Sorry sorry not ears

2Thank You

Aditya Bhadoria 7 years, 10 months ago

Hair nails and ear

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Ishani Raizada 7 years, 10 months ago

Nails

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what is solar system?

Posted by Rudra Sandilya 7 years, 10 months ago

CBSE > Class 08 > Science

2 answers

Adarsh Uppal 7 years, 10 months ago

Sun and eight celetial bodies revolving around the sun

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Rahul Kumar 7 years, 10 months ago

Solar system is a gravitionally bound comprising sun.the sun is orbited by eight planets, astroids ,meteors ,and with some drawf plantes

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What is the aim of Man and Biosphere program in India?

Posted by Mohit Dhabai 7 years, 10 months ago

CBSE > Class 08 > Science

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What is population change ?

Posted by Divyam Goyal 7 years, 10 months ago

CBSE > Class 08 > Science

1 answers

Tarique Aziz 7 years, 10 months ago

due to contamination of various unwanwanted particles like gases,fatory waste,etc

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Anyone need my science term 2 paper?

Posted by Bose Einstein 7 years, 10 months ago

CBSE > Class 08 > Science

2 answers

Bose Einstein 7 years, 10 months ago

Kashish where you live

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Kashish Bhardwaj 7 years, 10 months ago

Yes

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Do we have to condemn foeticide from our society

Posted by Rashi Mishra 7 years, 10 months ago

CBSE > Class 08 > Science

1 answers

Silvia Disusa 7 years, 10 months ago

Ya obviously

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Why don't all sperms get fertilized

Posted by Nibha Prakash 7 years, 10 months ago

CBSE > Class 08 > Science

1 answers

Divyam Goyal 7 years, 10 months ago

When sperm reached to egg one sperms fertilise it and after that there is explosion due to which remaining sperms degenerate

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what is *** chromosomes?

Posted by Rudra Sandilya 7 years, 10 months ago

CBSE > Class 08 > Science

1 answers

Yogita Ingle 7 years, 10 months ago

In the nucleus of each cell, the DNA molecule is packaged into thread-like structures called chromosomes. Each chromosome is made up of DNA tightly coiled many times around proteins called histones that support its structure.
Chromosomes are not visible in the cell’s nucleus—not even under a microscope—when the cell is not dividing. However, the DNA that makes up chromosomes becomes more tightly packed during cell division and is then visible under a microscope. Most of what researchers know about chromosomes was learned by observing chromosomes during cell division.
Each chromosome has a constriction point called the centromere, which divides the chromosome into two sections, or “arms.” The short arm of the chromosome is labeled the “p arm.” The long arm of the chromosome is labeled the “q arm.” The location of the centromere on each chromosome gives the chromosome its characteristic shape, and can be used to help describe the location of specific genes.

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Why it is preferable to a classify a material carrying electricity or not?

Posted by Ayan Banerjee 7 years, 10 months ago

CBSE > Class 08 > Science

0 answers

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Ask more questions

Posted by Khushbu Chouhan 7 years, 10 months ago

CBSE > Class 08 > Science

1 answers

Nikhil Kumar 7 years, 10 months ago

Natak mat karna

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Define earthquakes

Posted by Nikhil Tiwari 7 years, 10 months ago

CBSE > Class 08 > Science

3 answers

Amayra Yadav 7 years, 10 months ago

Earthquake is a natural phenomenon which happen because of sudden happening in earth crust

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Khushbu Chouhan 7 years, 10 months ago

An earthquake is a sudden shaking or trembling of the earth. Earthquake is caused by a disturbance keep inside the earth crust

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Dhanyatha S Maddodi 7 years, 10 months ago

Earthquakes are caused by tremors deep inside the first layer of the earth the crust

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What is deforestion?

Posted by Aditya Sharma 7 years, 10 months ago

CBSE > Class 08 > Science

2 answers

Khushbu Chouhan 7 years, 10 months ago

Deforestation means clearing of forest and using that land for other purpose

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Harshvardhan Singh Butola 7 years, 10 months ago

Deforestion is a term is which the cutting of trees

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What is manometer?

Posted by Shruti Sonje 7 years, 10 months ago

CBSE > Class 08 > Science

1 answers

Yogita Ingle 7 years, 10 months ago

manometer may be any device that measures pressure.
A simple manometer can be built by partially filling a clear plastic tube with a colored liquid to allow the fluid level to be easily observed. The tube is then bent into a U-shape and fixed in an upright position. The levels of the fluid in the two vertical columns should be equal at this point, as they are currently exposed to the same pressure. This level is therefore marked and identified as the zero point of the manometer.

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Which is the smallest cell in the world

Posted by Kamesh Binodini 7 years, 10 months ago

CBSE > Class 08 > Science