CBSE > Class 08 > Science | CBSE Board | Homework Help

Most of the eyes is filled with a clear gel called vitreous light projects through your pupil & lens to the black of the eyes . The inside lining of the eyes is covered by special light sensing cell that are collectively called the retina . It converts light into electrical impulses

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User User 7 years, 1 month ago

Hope it is right

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User User 7 years, 1 month ago

Pupil cornea

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how many chapters are coming in sa2 class 8 in science

Posted by Aryan Kumar 7 years, 1 month ago

CBSE > Class 08 > Science

1 answers

Yuv Raj 7 years, 1 month ago

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Why friction is necessary evil ?

Posted by Khushi Tyagi Tyagi 7 years, 1 month ago

CBSE > Class 08 > Science

2 answers

Ritik Dhakad 7 years, 1 month ago

Though friction is necessary to walk on road, write on board or in paper, etc. ,it produces heat which in turn causes wear and tear of objects. Thus, friction is a necessary evil

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Yogita Ingle 7 years, 1 month ago

Friction is very important for us it helps in:,It allows us to walk comfortably, It allows us to grip and catch other objects. Things do not move from their places because of the friction. Speeds of moving objects can be controlled due to friction only. But apart from this friction is considered as an evil because; it causes wear and tear in objects of our daily use including machines. It makes movement of heavy objects very difficult.We need to spend a lot of time and money for the maintenance of various machines in order to keep their friction low.

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what is the smallest organism in the human body ?

Posted by Likitha Reddy 7 years, 1 month ago

CBSE > Class 08 > Science

1 answers

Himanshu Garg 7 years, 1 month ago

Pineal gland near the center of the brain

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What is the important questions or frequently asked questions in chapter -4 carbon and compounds?

Posted by Avi Adi 7 years, 1 month ago

CBSE > Class 08 > Science

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What is IVF

Posted by Dharanesh Kumar 7 years, 1 month ago

CBSE > Class 08 > Science

1 answers

Ritik Dhakad 7 years, 1 month ago

IVF stands for in - vitro fertilization. In latin, vitro means glass. If there is blockage in the fallopian tubes of female, then the fertilisation takes place in the test tube. This process is called in - vitro fertilization.

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What are the advantages of using CNG and LPG as fuel ?

Posted by Swara Satpute 7 years, 1 month ago

CBSE > Class 08 > Science

1 answers

Jashanpreet Singh 7 years, 1 month ago

The advantages of using CNG(Compressed Natural Gas) and LPG(Liquified Petroleum Gas) are : 1.They can burnt directly. 2.They can be transported easily through pipelines. 3.They are clean fuels and do not smoke when burn. 4. They give lot of heat energy when burn.

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Metal and non-metal who lessons

Posted by Rahul Kumar 7 years, 1 month ago

CBSE > Class 08 > Science

3 answers

Rohitha Lakshmi 7 years, 1 month ago

Chemistry

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Rudra Shukla 7 years, 1 month ago

Chemistry.

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Rahul Kumar 7 years, 1 month ago

Physics

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Table salt mixed in water acts as dash in electrolysis

Posted by Khushi Asnani 7 years, 1 month ago

CBSE > Class 08 > Science

1 answers

Xyz Xyz 7 years, 1 month ago

Electrolytes

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Define Golgi body

Posted by Rohitha Lakshmi 7 years, 1 month ago

CBSE > Class 08 > Science

2 answers

Rohitha Lakshmi 7 years, 1 month ago

Thank u soo much?

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Ayush Saiwal 7 years, 1 month ago

Golgi bodies are flat and membraneous structures that are found near nucleus of most cells . They are Secretory organelles. They secret substances such as enzymes and proteins.

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Define cytoplasm

Posted by Rohitha Lakshmi 7 years, 1 month ago

CBSE > Class 08 > Science

3 answers

Rohitha Lakshmi 7 years, 1 month ago

Thankss???

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Ritik Dhakad 7 years, 1 month ago

Cytoplasm is a jelly like substance present between the nuclear membrane and cell membrane. It has small bodies in it which are called cell organelles.

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Shambhavi Pandey 7 years, 1 month ago

Cytoplasm is a transparent, jelly - like material which fills the cell between nucleus and cell membrane

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What is the difference between noise and music

Posted by Ekta Sahu 7 years, 1 month ago

CBSE > Class 08 > Science

3 answers

Ayush Saiwal 7 years, 1 month ago

If you want the answer scientifically then inmusic the pitch of sound is well balance but in noise there are so many different types of vibrations which are not pleasing to our ears

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Aryan Srivastava 7 years, 1 month ago

The sound that produces displeasing and discordant effect in our ears and mind is noise

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Anu Radha 7 years, 1 month ago

Music Pleasant sound Noise Unpleasant sound

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What are electrodes?explain its 2 types

Posted by Samyuktha Tr 7 years, 1 month ago

CBSE > Class 08 > Science

1 answers

Ayush Saiwal 7 years, 1 month ago

There are 2 types of electrodes anode and cathode which are used in the process of electrolysis.

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What frequencies are heard by dogs and cats?

Posted by Oorvi . K 7 years, 1 month ago

CBSE > Class 08 > Science

2 answers

Ayush Saiwal 7 years, 1 month ago

More than 20000 hertz

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Ayush Gupta 7 years, 1 month ago

This can be answered by scientists or google baba

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How do whales and dolphins hear the sound?

Posted by Oorvi . K 7 years, 1 month ago

CBSE > Class 08 > Science

1 answers

Yogita Ingle 7 years, 1 month ago

They make sounds under the water that sound like cries. These sounds are heard by other organisms of their species, and is understood. The scientists also said that they make a sound and they can know their location and where others are by sound wave that they made. Whales can also relate to musical instruments like, violins, Cello's, trumpets, trombones and harps.

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What is vocal cords?

Posted by Oorvi . K 7 years, 1 month ago

CBSE > Class 08 > Science

1 answers

Yogita Ingle 7 years, 1 month ago

The cords which are stretched across the voice box or larynx are called vocal cords.
Two vocal cords are there across the voice box in such a way that it leaves a narrow slit between them for the passage of air.
When the lungs force air through the slit, the vocal cords vibrate producing sound.

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Where is cell mambane is found in cell?

Posted by Kamlesh Nayak 7 years, 1 month ago

CBSE > Class 08 > Science

4 answers

Aditya Sharma 7 years, 1 month ago

Outside of the cell

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Maria Anna Alwin 7 years, 1 month ago

Cell walls are only found in plant cells and are used primarily to create structure, but cell membranes are found in all cells. The bulk of the membrane is composed of a double layer of lipids called the lipid bilayer. Inside the bilayer there is a layer of cholesterol to keep the membrane fluid.

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Yogita Ingle 7 years, 1 month ago

The cell membrane is made up of lipids like cholesterol and proteins. 50% of all types of protein found in a cell are in the cell membrane. Cell membrane is also called plasma membrane. It makes the boundary of a cell. It is composed of protein and lipid. It is porous and allows various materials to pass through it. Cell membrane is semi-permeable in nature which means it allows selected materials to pass through it.

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Ayan Paul 7 years, 1 month ago

At the boundary of an animal cell

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what is diffrence between Hydra and Hydrila?

Posted by Kamlesh Nayak 7 years, 1 month ago

CBSE > Class 08 > Science

2 answers

Yogita Ingle 7 years, 1 month ago

Hydra

Hydra is an animal .
Hydra is a fresh water animal that is best studied under microscope.
It is commonly found in pond water.
It reproduces by budding.

Hydrilla

Hydrilla is a plant..
Hydrilla is a submerged aquatic plant.
It is found in almost all types of waters.
Its leaves are pointed.
It reproduces by stem fragments, growth of axillary buds or through tubers.

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Ayan Paul 7 years, 1 month ago

Hydrilla is an aquatic plant whereas Hydra is a marine animal of Phylum Porifers

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What is binaey fusion

Posted by Kamlesh Nayak 7 years, 1 month ago

CBSE > Class 08 > Science

1 answers

Yash Joshi 7 years, 1 month ago

See its the step which happens when amoeba reproduces one like him in this process The amoeba becomes larger and form one more nucleus and then seprates into two halfs

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What is positive and negative charge

Posted by Aniket Saxena 7 years, 1 month ago

CBSE > Class 08 > Science

1 answers

Yogita Ingle 7 years, 1 month ago

All objects surrounding us (including people!) contain large amounts of electric charge. There are two types of electric charge: positive charge and negative charge. If the same amounts of negative and positive charge are found in an object, there is no net charge and the object is electrically neutral.

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Define frictional force , muscular force, sliding friction

Posted by Sahil Yadav 7 years, 1 month ago

CBSE > Class 08 > Science

2 answers

Tanuuuu Varshney 7 years, 1 month ago

Frictional force - the force which always oppose the motion of one body over another body is called frictional force. Muscular force - the force exerts by the muscles of our body is called muscular force..

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Anurag Jhajharia 7 years, 1 month ago

Frictional force any thing which oppose the motion Muscular any type of force which exert from our mucles

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