CBSE > Class 07 > Science | CBSE Board | Homework Help

Osmosis: Movement of water through a semi-permeable membrane from high water concentration to low water concentration is called osmosis. Osmosis is a type of diffusion. Cell membrane is a semi-permeable membrane. Substances move across the cell membrane because of osmosis. Seeds swell up; when soaked in water; because of osmosis.

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How many bones in humam

Posted by Gurbaj Singh 7 years, 6 months ago

CBSE > Class 07 > Science

2 answers

Kanishika Nahal 7 years, 6 months ago

206

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. . 7 years, 6 months ago

206

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How many bone in humans

Posted by Gurbaj Singh 7 years, 6 months ago

CBSE > Class 07 > Science

2 answers

Prince Kumar 7 years, 6 months ago

There are 206 bones in human

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Khushboo Rani 7 years, 6 months ago

206

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What is the definition of plasma - (40-80) words

Posted by Nancy Sharma 7 years, 6 months ago

CBSE > Class 07 > Science

2 answers

Anchal Joshi 7 years, 6 months ago

Plasma is a fluid that flow in blood it is yellow in colour it contains 90 percent of water &3.5 percent of salt it helps in transportation of food and removable of waste material from the body

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Namit Seth 7 years, 6 months ago

Plasma is liquid part of blood which carry waste, digested food and other things.

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What do you mean by thunder storm

Posted by Anchal Joshi 7 years, 6 months ago

CBSE > Class 07 > Science

1 answers

Nancy Sharma 7 years, 6 months ago

The swift movement of the falling water droplets along with the rising air create lightning and sound. It is the event that we call a thunderstorms.

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What is litmus paper

Posted by Kanishk Yaduvanshi 7 years, 6 months ago

CBSE > Class 07 > Science

3 answers

Vikas Rajput 7 years, 6 months ago

litmus paper is a natural indigator which is made up of lichens

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Kanishika Nahal 7 years, 6 months ago

Litmus paper is natural indicatore that are made up of lichens.

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Mayank Gupta 7 years, 6 months ago

Litmus paper is a natural indicator made from lichens plant

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What is spent sludge?

Posted by Jiya Arora 7 years, 6 months ago

CBSE > Class 07 > Science

1 answers

Ayush Kumar Rout 7 years, 6 months ago

Spent catalyst, stone sludge, limestone sludge, and iron-oxide sludge were used as raw materials in the tests. Spent catalyst was taken from the Taoyuan Refinery Plant. ... Limestone sludge is composed of 50% CaO that is potential to be a substitute for mineral limestone as raw material of cement.

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Why is silverd glass is used as mirror?

Posted by Namit Seth 7 years, 6 months ago

CBSE > Class 07 > Science

1 answers

Ayush Kumar Rout 7 years, 6 months ago

Silver water is a general term for silver particles within water, although there are numerous types. The most basic solution consists of visible pieces of silver in tap water, whereas “ionic silver” is a more sophisticated type and involves the process of electrolysis to produce positive silver ions suspended in a colloidal solution. The safest and most biologically active silver solutions contain the smallest particles and the purest water.

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Main step of nutrition vin humans

Posted by Shubhum Rajput 7 years, 6 months ago

CBSE > Class 07 > Science

1 answers

Namit Seth 7 years, 6 months ago

Main step of nutrition in humans are ingestion, digestion, absorption, assimilation and egestion

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What is si unit of speed

Posted by Sagar Singh 7 years, 6 months ago

CBSE > Class 07 > Science

4 answers

Mayank Gupta 7 years, 6 months ago

M/s

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Ayush Kumar Rout 7 years, 6 months ago

SI unit of speed is m/s (meter / per second).

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Riya Agrawal 7 years, 6 months ago

m/s,km/hr

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Namit Seth 7 years, 6 months ago

M/S

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Tfchhjjjvvv

Posted by Rishab Mayank 7 years, 6 months ago

CBSE > Class 07 > Science

0 answers

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What us conduction

Posted by Atika Patel 7 years, 6 months ago

CBSE > Class 07 > Science

1 answers

Yogita Ingle 7 years, 6 months ago

Conduction- It is a process of heat transfer from hot end to cold end from particle to particle of medium without actual movement of particles. Also, in conduction, heat gets transferred between substances that are in direct contact with each other. In solids heat transfer takes place by conduction. For example, when you pop corn in a cooker on a flame, heat is transferred from the flame to the corn by conduction.
Based on their ability to conduct heat, materials are classified into conductors and insulators. Materials that allow heat to flow through them are called conductors. Examples: copper, steel, silver, iron and mercury. Materials that do not allow heat to flow through them are called insulators. Examples: wood, paper, rubber, cork, glass, bakelite and ceramic.

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Where urine is formed

Posted by Simranjeet Kour 7 years, 6 months ago

CBSE > Class 07 > Science

3 answers

Jagrit Dhiman 7 years, 6 months ago

It form in Kidney and ureter carry it into urinary blader

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Vikas Rajput 7 years, 6 months ago

in kideny and in urinary bladder also

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Namit Seth 7 years, 6 months ago

In kidney

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What acid does each cell in our body contain?

Posted by Suzain Shaikh 7 years, 6 months ago

CBSE > Class 07 > Science

3 answers

Namit Seth 7 years, 6 months ago

It's latic acid

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Namit Seth 7 years, 6 months ago

Lati acid

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Tanushree Maheshwari 7 years, 6 months ago

Recover

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What is speed meter and odometer ?

Posted by S Pooja 7 years, 6 months ago

CBSE > Class 07 > Science

2 answers

Mayank Gupta 7 years, 6 months ago

Speedo meter is used to measure speed while odometer is used to measure distance

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Kanishk Yaduvanshi 7 years, 6 months ago

Speed meter is speed of vehicle and odometer is distance covered by vehicle

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Bile juice are produced

Posted by Shubhum Rajput 7 years, 6 months ago

CBSE > Class 07 > Science

4 answers

Prince Kumar 7 years, 6 months ago

Bile juice is secreted by liver??

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Vikas Rajput 7 years, 6 months ago

gall bladder

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Mahira Anjum 7 years, 6 months ago

In liver

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Kanishika Nahal 7 years, 6 months ago

Liver

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Explain how animals dwelling in the forest help it grow regenerate

Posted by Mahmood Abbas 7 years, 6 months ago

CBSE > Class 07 > Science

2 answers

Namit Seth 7 years, 6 months ago

https://goo.gl/search/explain+how+animals+dwelling+in+the+forest+help+it+grow+and+regenerate 7 grade science | Explain how animals dwelling in the forest hel ... (i) Micro-organisms convert the dead plants and animals to humus. This humus helps in returning the nutrients back to the soil. ... (iii) The decaying animal dung provides nutrients to various types of seedlings to grow. All these activities of animals dwelling in the forest help it to grow and regenerate.

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Anchal Joshi 7 years, 6 months ago

Animal in forest help in following ways The microorganisms convert the dead matter into humus which act as fertilizer to soil & help in growing of plant Animal help in cycle of gase the absorb the oxygen release by plant & release co2 which is absorbed by plant

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What is electron

Posted by Aquib Jawed 7 years, 6 months ago

CBSE > Class 07 > Science

1 answers

Namit Seth 7 years, 6 months ago

https://m.youtube.com/watch?v=ky1Awa0pJ0s ? What is Electron? - YouTube

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Pulmonary vein carry which type of blood

Posted by Nainsi Duggal 7 years, 6 months ago

CBSE > Class 07 > Science

4 answers

Jagrit Dhiman 7 years, 6 months ago

It carry oxygenated blood

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Khushboo Rani 7 years, 6 months ago

Oxgenated blood

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Kanishika Nahal 7 years, 6 months ago

Oxygenated

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Aquib Jawed 7 years, 6 months ago

It carry oxygenated blood

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How are aquatic organisms adapted to survive in water?

Posted by Saurabh Sharma 7 years, 6 months ago

CBSE > Class 07 > Science

1 answers

Prince Kumar 7 years, 6 months ago

Aquatic organisms adapted to survive in water because the aquatic organisms have gills??

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What is SI unit of speed ?

Posted by Aarchie Amasara 7 years, 6 months ago

CBSE > Class 07 > Science

1 answers

Krishna Choureya 7 years, 6 months ago

The SI unit of speed is m/s

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Meaning of speedmeter

Posted by Atika Patel 7 years, 6 months ago

CBSE > Class 07 > Science

2 answers

Mahira Anjum 7 years, 6 months ago

It is an instrument used to measure speed

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Shubhum Rajput 7 years, 6 months ago

An instrument on a vehicle dashboard indicating its speed

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Difference between wheather and climate.

Posted by Bafna . 4 years, 3 months ago

CBSE > Class 07 > Science

1 answers

Sia ? 4 years, 3 months ago

Weather reflects short-term conditions of the atmosphere while climate is the average daily weather for an extended period of time at a certain location. ... Weather can change from minute-to-minute, hour-to-hour, day-to-day, and season-to-season. Climate, is the average of weather over time and space.

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What is the answer for this Difference between wheather and climate

Posted by Bafna . 7 years, 6 months ago

CBSE > Class 07 > Science

1 answers

Yogita Ingle 7 years, 6 months ago

Weather: (i) Weather is the state of the atmosphere on a current day at a current time. It changes day to day.
(ii) Weather includes sunshine, rain, cloud cover, winds, hail, snow, sleet, freezing rain, flooding, blizzards, ice storms, thunderstorms, steady rains from a cold front or warm front, excessive heat, heat waves and more.
(iii) Day to day forecast can be done depending on the air pressure, temperature and other similar factors.
(iv) Study in Meteorology.

Climate:(i) Climate is the average conditions that are expected at a certain place over a number of years.
(ii) Climate may include precipitation, temperature, humidity, sunshine, and wind velocity, phenomena such as fog, frost, and hail storms over a long period of time.
(iii) Climate forecast can only be done over longer periods of time, such as 30 years. The average of weather over 30 years helps determine the climate of a certain area.
(iv) Study in Climatology.

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Deforestation causes???

Posted by Cbse Guide 7 years, 6 months ago

CBSE > Class 07 > Science