CBSE > Class 09 > Science | CBSE Board | Homework Help

Hi.... A suggestion for class 9th students regarding their science syllabus completion.... u all can score 💯 marks in science by studying from a wonderful superb YouTube channel... It has been started by the topper of my school... A few days ago she has started the channel all of u are advised to watch science video from that channel... Abi tk only 1 ch Is uploaded by her Ch 1 matter in our surroundings... Nd after watching that video m 100% sure that aap sb science k toppers bn jaoge... Nd video achi lge toh Bohot sara support dekr yani video ko like krke channel ko subscribe krke aur video ko share krke support kre taki aur achi achi video vo aap sbke pyar se motivate hokr bnae.... Channel name is :- Brighter Together... If u want me to share link of the video comment me down... Aur video aapko achi lge then too comment me down... Thank you Video puri dekhiyega....

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Oli Olivia 10 hours ago

Lysosomes are sphere-shaped sacs filled with hydrolytic enzymes that have the capability to break down many types of biomolecules. Lysosomes are known as suicide bags of the cell because they contain lytic enzymes capable of digesting cells and unwanted materials.

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Study📚✏ 🙆 12 hours ago

Hi bacha log... Aap logo ne btaya nhi mughe ki aapne video dekhi ya nhi... Aur kaisi lgi video ye bhi nhi btaya... Aur bhi bhi nhi bataya ki aap logo ne channel ko subscribe kiya ya nhi video achi lge toh apne sarre frnds k sath share krna... We need ur support agar Aap log support kroge tbi Topper didi aap logon k liye aur videos banenge.. Comment kr dena unhe ki aap logo ko kon se ch ki video chahiye.. Ek aur chizz video m di ne imp questions bhi krwae h... Anyways vo toh already topper h science ki toh unhe toh vaise hi Bohot experience hoga ki kon sa question important h aur kon sa nhi.... Ab mughe btao niche comment krke kya Aap logon ne video dekhi ya nhi..

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Posted by Jit Priya Ranjan Sahoo Sahoo 5 hours ago

CBSE > Class 09 > Science

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Don't post personal information, mobile numbers and other details.
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Posted by Study📚✏ 🙆 5 hours ago

CBSE > Class 09 > Science

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When does menstruation occurs after ovulation

Posted by Lavanya Kadlimatti 1 day, 23 hours ago

CBSE > Class 09 > Science

2 answers

Oli Olivia 10 hours ago

After ovulation comes the luteal phase. If pregnancy occurs during this phase, hormones will keep the lining from shedding with a menstrual period. Otherwise, a flow will start around day 28 of the cycle, beginning the next cycle.

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Study📚✏ 🙆 1 day, 5 hours ago

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How can we distinguish between a colloidal and a true solution. Explain with the help of diagram

Posted by Sohit Kumar 10 hours ago

CBSE > Class 09 > Science

1 answers

Sia 🤖 10 hours ago

The answer to given questions are as follows -
A1 - True solution is a mixture of homogenous particle which dissolve easily making the solution transparent. Colloidal solution is a mixture of heterogeneous mixture, which don't dissolve and hence form translucent or opaque solution.
A2 - In smoke, dispersion medium is gas while dispersed phase is solid.
In fog, dispersion medium is gas while dispersed phase is liquid.
In cloud, dispersion medium is gas while dispersed phase is liquid.
A3 - Colloidal solution is a heterogeneous mixture due to presence of different sized particles present in the solution. The solution appears to be homogenous due to very small size of small particles, which is not visible by naked eye.
A4 - Colloidal solution from given options is - soap + water mixture and fog.

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How to solve average speed and acceleration

Posted by Dipak Garg 2 days, 4 hours ago

CBSE > Class 09 > Science

1 answers

Suraj Soni 2 days, 3 hours ago

Avg speed = total distance/total time taken Acceleration = change in velocity/ time

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Reply plz my questions define democracy

Posted by Anushka Saini 2 days, 10 hours ago

CBSE > Class 09 > Science

2 answers

Anushka Saini 1 day, 23 hours ago

Thnks

1Thank You

Ramesh Ram 2 days, 8 hours ago

Democracy is a form of government in which the people have authority to choose their governing legislator..... In a direct democracy, the people directly deliberate and decide on legislation.

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ANSWER

Define agriculture

Posted by Anushka Saini 2 days, 10 hours ago

CBSE > Class 09 > Science

2 answers

Anushka Saini 1 day, 23 hours ago

Thanks

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Amit Kumar 2 days, 8 hours ago

The cultivation of crops is called agriculture.

3Thank You

ANSWER

Define reflection

Posted by Anushka Saini 2 days, 10 hours ago

CBSE > Class 09 > Science

2 answers

Anushka Saini 1 day, 23 hours ago

Thnks

0Thank You

Amit Kumar 2 days, 8 hours ago

The phenomenon due to which a ray of light travels from one optical medium to another bouncing off from its surface with the change of angle is called reflection.

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I am not able to use the referal code of cbse guide can u help me how to do so

Posted by Anish Janghu 3 days, 3 hours ago

CBSE > Class 09 > Science

1 answers

Alok Singh 3 days, 1 hour ago

Sar Mumbai mein kya denge

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What are the major divisions in the plantae?

Posted by Miril Bhandari 3 days, 5 hours ago

CBSE > Class 09 > Science

1 answers

Nandani Sha 3 days, 5 hours ago

4 plantae

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How does the cork act as a protective tissue?

Posted by Miril Bhandari 3 days, 6 hours ago

CBSE > Class 09 > Science

1 answers

Ramesh Ram 2 days, 8 hours ago

The cork cell are dead completely packed with no intermolecular space. It protects the plants against mechanical injury and also prevents the loss of water by evaporation.

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What about a rubber band can it change its shape on stretching? Is it a solid?

Posted by Abir Chakraborty 3 days, 7 hours ago

CBSE > Class 09 > Science

1 answers

Anish Janghu 3 days, 3 hours ago

Yes it is solid but when we applie force on the rubber band it change its shape but when we expelled the rubber band it come back in its shape

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4.Mention the features of all chordates.

Posted by Miril Bhandari 2 days, 8 hours ago

CBSE > Class 09 > Science

1 answers

Sia 🤖 2 days, 8 hours ago

Features are:

Have a notochord
Have a dorsal nerve cord
are triploblastic
are coelomate

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What is matter🎃

Posted by Mohit Mishra 3 days, 10 hours ago

CBSE > Class 09 > Science

5 answers

Dipak Garg 2 days, 4 hours ago

Anything which need space and mass is called mater

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Abir Chakraborty 3 days, 6 hours ago

•Any thing which occupies space and have mass is called matter. •Matter is made up of small particles (atom or molecules).

2Thank You

Pallavi Raj 3 days, 9 hours ago

Anything which occupies space and have some mass is known as matter

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Miril Bhandari 3 days, 9 hours ago

Anything which occupies space and had mass is called matter

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Mohit Mishra 3 days, 10 hours ago

Matter is made up of small particles.

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The value of a question G in the law of gravity

Posted by Rajnandini Soni 3 days, 10 hours ago

CBSE > Class 09 > Science

1 answers

Rajnandini Soni 3 days, 11 hours ago

Displacement on the mass of Earth only

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Chapter 1 ka answer the following questions

Posted by Prince Kumar Prajapati 4 days, 22 hours ago

CBSE > Class 09 > Science

3 answers

Dipak Garg 2 days, 4 hours ago

Which subject beta

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Pallavi Raj 3 days, 9 hours ago

Which subject

2Thank You

Lovelash Patwa 4 days, 11 hours ago

Which subject

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Atomic number of sulfer

Posted by Jagdish Panda 5 days, 12 hours ago

CBSE > Class 09 > Science

5 answers

Sia 🤖 5 days, 12 hours ago

Atomic number of sulfur = 16

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Pallavi Raj 3 days, 9 hours ago

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Praveen Pathak 5 days, 2 hours ago

Which of the following matter

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Bhanu Pratap Yadav 5 days, 4 hours ago

🌝 it's suplhur

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Himanshu Rathore 5 days, 5 hours ago

Atomic number of sulphur=16

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How we can change the state of matter

Posted by Sristy Kumari 6 days, 2 hours ago

CBSE > Class 09 > Science

2 answers

Ramesh Ram 2 days, 8 hours ago

Matter can change from one state to another if heated or cooled. If ice is heated it change in water. If water is heated it change in steam.

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Abhinav Singh Bhadoriya 5 days, 12 hours ago

When we increase or decrease the temperature the state of matter change

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What at room temperature is a liquid

Posted by Ruchi Kanaujia 6 days, 12 hours ago

CBSE > Class 09 > Science

5 answers

Raj Nandni 5 days, 22 hours ago

Mercury

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Harsh Wardhan Singh Rathore 6 days, 5 hours ago

meecury

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Mayank Jha 6 days, 7 hours ago

Mercury

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Prachi Saxena 6 days, 8 hours ago

Mercury is the Answer

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Mragank Galav 6 days, 10 hours ago

Mercury

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Don't post personal information, mobile numbers and other details.
Don't use this platform for chatting, social networking and making friends. This platform is meant only for asking subject specific and study related questions.
Be nice and polite and avoid rude and abusive language. Avoid inappropriate language and attention, vulgar terms and anything sexually suggestive. Avoid harassment and bullying.
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Posted by Chinuff Sahare 6 days, 4 hours ago

CBSE > Class 09 > Science

0 answers

ANSWER

Definition of matter

Posted by Sarita Yadav 6 days, 21 hours ago

CBSE > Class 09 > Science

5 answers

Prem Singh 5 days, 1 hour ago

Anything which occupies space and has mass is called matter

1Thank You

Abhinav Singh Bhadoriya 5 days, 12 hours ago

Anything which occupy space and having mass or volume is called matter

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Akash Kumar Thakur 6 days, 13 hours ago

Everthing in our universe made by material each material are matter

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Anu Kumari 6 days, 23 hours ago

A matter is that which can occupy space and have mass and volume

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Adarsh Kumar 6 days, 23 hours ago

Anything that has a space and mass and can be felt by our senses

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Why BaSo4(s) is percitipate why not Na2So4??

Posted by Nidhi Badgujar 6 days, 21 hours ago

CBSE > Class 09 > Science

1 answers

Anu Kumari 6 days, 23 hours ago

This is because (BaSo4) is a solid solute which separated as a precipitate while Na2So4 is soluble in water.

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Notes on matter

Posted by Ganti Vedha Vignyathri 1 week ago

CBSE > Class 09 > Science

2 answers

Abhinav Raghuvanshi 6 days, 7 hours ago

Anything that occupies space and has mass and is felt by senses is called matter. According to indian ancient philosphor, matter is the form of five basic elements (the Panchtatva) – air , earth ,fire , sky and water. Characteristics of particles of matter Made of tiny particles. Vacant spaces exist between particles. Particles are in continuous motion. Particles are held together by forces of attraction. States of Matter Basis of Classification of Types Based upon particle arrangement Based upon energy of particles Based upon distance between particles Five states of matter Solid Liquid Gas Plasma Bose-Einstein condensate (I) SOLID Fixed mass, volume and shape Inter-particle distances are least. Incompressible. High density and do not diffuse Inter particle forces of attraction are strongest. Constituent particles are very closely packed. (II) LIQUID Not fixed shape but fixed volume and mass. Inter particle distances are larger than solid. Almost incompressible. Density is lower than solids and can diffuse. Inter particle forces of attraction are weaker than solids . Constituent particles are less closely packed. (III) GAS Neither fixed shape nor fixed volume. Inter particle distances are largest. Highly compressible. Density is least and diffuse. Inter particle forces of attraction are weakest. Constituent particles are free to move about. (IV) PLASMA (NON-EVALUATIVE) A plasma is an ionized gas. A plasma is a very good conductor of electricity and is affected by magnetic fields. Plasma, like gases have an indefinite shape and an indefinite volume. Ex. Ionized gas (v) BOSE-EINSTEIN CONDENSATE (non –evaluative) A BEC is a state of matter that can arise at very low temperatures. The scientists who worked with the Bose-Einstein condensate received a Nobel Prize for their work in 1995. The BEC is all about molecules that are really close to each other (even closer than atoms in a solid). Microscopic Explanation for Properties of Solids Solids have a definite shape and a definite volume because the particles are locked into place Solids do not flow easily because the particles cannot move/slide past one another Solids are not easily compressible because there is little free space between particles Microscopic Explanation for Properties of Liquids Liquids are not easily compressible and have a definite volume because there is little free space between particles. Liquids flow easily because the particles can move/slide past one another. Liquids flow easily because the particles can move/slide past one another. Microscopic Explanation for Properties of Gases Gases are easily compressible because there is a great deal of free space between particles Gases flow very easily because the particles randomly move past one another. Gases have an indefinite shape and an indefinite volume because the particles can move past one another (non –evaluative) Microscopic Explanation for Properties of Plasmas Plasmas have an indefinite shape and an indefinite volume because the particles can move past one another. Plasmas are easily compressible because there is a great deal of free space between particles. Plasmas are good conductors of electricity &are affected by magnetic fields because they are composed of lens. Microscopic Explanation for Properties of BEC Particles are less energetic than solids because Exist at very low temperature. Particles are literally indistinguishable because they are locked into same space . BEC shows super fluidity because Particles can flow without friction. Interchange in states of matter Water can exist in three states of matter – Solid, as ice, Liquid, as the familiar water, and Gas, as water vapour.

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H S S 1 week ago

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विलियन क्या है उदाहरण सहित बताएं

Posted by Mukund Jha 5 days, 4 hours ago

CBSE > Class 09 > Science