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    • Posted by Archi Ramani 7 years, 3 months ago

    CBSE > Class 07 > Science
    • 3 answers

    Medha Tiwari 7 years, 2 months ago

    Some unwanted dust particles enter our nose along with the air that we breath. While entering the wind pipe these dust particles get entangled in the hair present in our nostrils. When these particles cause irritation inside our nose it results in sneezing

    0Thank You

    Sudha Kumari 7 years, 3 months ago

    Sorry i type the wrong answer

    0Thank You

    Sudha Kumari 7 years, 3 months ago

    When we need some particles around us get drafted into the hair of our nose so eat it give irritation in our nose and so we sneeze

    1Thank You

    ANSWER

    • Posted by Aryan Aryan 7 years, 3 months ago

    CBSE > Class 07 > Science
    • 4 answers

    Nikhil Kumar 7 years, 2 months ago

    When iron comes in contact of air and water it becam brownish color this process is called rusting

    0Thank You

    Sudha Kumari 7 years, 3 months ago

    Rusting is a chemical change because we get new substance from iron

    0Thank You

    Suyog Sonar 7 years, 3 months ago

    A change in which iron become brownish substance is called rust and this process is called as rusting

    2Thank You

    Adrija Borgohain 7 years, 3 months ago

    A redish Brown substance get deposited over an object when the object is left behind in the open moist air, this substance is known as rust and the process is know as rusting

    2Thank You

    ANSWER

    • Posted by Sahil Sonwani 7 years, 3 months ago

    CBSE > Class 07 > Science
    • 1 answers

    Aryan Aryan 7 years, 3 months ago

    Heart attack comes when your nerve is overflowed Eat tamato ? for prevention Meet a heart doctor for your treatment

    3Thank You

    ANSWER

    • Posted by Karishma Singh 7 years, 3 months ago

    CBSE > Class 07 > Science
    • 0 answers
    ANSWER

    • Posted by Nisha Yadav 7 years, 3 months ago

    CBSE > Class 07 > Science
    • 1 answers

    Yogita Ingle 7 years, 3 months ago

    Transport of materials is necessary for plants or animals because due to it the nutrients and oxygen are made available to all the parts of the body. If the transport of necessary nutrients and oxygen does not take place in the body, the body will not be able to survive.

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    • Posted by Best Player 7 years, 3 months ago

    CBSE > Class 07 > Science
    • 2 answers

    Krisha Zala 7 years, 3 months ago

    It is also corrosive to skin

    0Thank You

    Sanjay Patel 7 years, 3 months ago

    The properties of acids are :- 1). Acids are sour in taste. Like- vinegar. 2). Acids contain hydrogen ions. 3). They are liquid. 4). They are solution of compounds in water. 5). Acids turn blue litmus paper into red litmus paper.

    2Thank You

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    • Posted by Best Player 7 years, 3 months ago

    CBSE > Class 07 > Science
    • 3 answers

    Amiya Gope 7 years, 3 months ago

    The special type of substances that is used to know whether a substances is acidic or basic is called indicator. Example:china rose,turmeric,litmus,methyl orange etc.

    1Thank You

    Surya Parkash Kal Kal 7 years, 3 months ago

    Indicators are special substances which give different colors when come in contact of ACID and BASE. Eg. Litmus paper ,China rose etc.

    1Thank You

    Prince Pal 7 years, 3 months ago

    Indigator is a material which is used to define wither the given solution is acidic,basic or nutral

    2Thank You

    ANSWER

    • Posted by Best Player 7 years, 3 months ago

    CBSE > Class 07 > Science
    • 4 answers

    Surya Parkash Kal Kal 7 years, 3 months ago

    It is a reaction of ACID and BASE to form salt and water and heat energy is released. In general Acid+Base- Salt +Water +58.1Kilojoule (kj)

    0Thank You

    Amiya Gope 7 years, 3 months ago

    The reaction between an acid and a base for formed salt, water and heat is called neautralisation. Example: acid+base=salt+water+heat HCL+NaOH=NaCL+H2O+heat

    1Thank You

    K S 7 years, 3 months ago

    When the acid and base mixed together both of them neutralise and the third substance called salt is formed.

    0Thank You

    Nerash Chauhan 7 years, 3 months ago

    The reaction which is formed by acid and base is called neutralisation reaction

    1Thank You

    ANSWER

    • Posted by Best Player 7 years, 3 months ago

    CBSE > Class 07 > Science
    • 2 answers

    K S 7 years, 3 months ago

    When the acid and base mixed both of them are neutralise and the third substance called salt is formed

    0Thank You

    Rishi Raj 7 years, 3 months ago

    Salt in its natural from as a crystalline mineral is known as rock salt or halite

    0Thank You

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    • Posted by Best Player 7 years, 3 months ago

    CBSE > Class 07 > Science
    • 1 answers

    Meghna Thapar 5 years, 10 months ago

    i. Hydrochloric acid reacts with litmus solution and produces red colour showing that it is acidic in nature.

    ii. Sodium hydroxide reacts with litmus solution and produces blue colour showing that it is basic in nature.

    iii. Water do not react with litmus solution showing that it is neutral in nature.

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    • Posted by Kritika Verma 7 years, 3 months ago

    CBSE > Class 07 > Science
    • 3 answers

    Krisha Zala 7 years, 3 months ago

    It is also process of releasing energy in presence of o2 from food is called respiration

    1Thank You

    Krisha Zala 7 years, 3 months ago

    The process of breakdown food in a presence of oxygen to release energy is called respiration and main common respiratory subtrate is glucose

    1Thank You

    Balaji Pandre 7 years, 3 months ago

    Daibtis

    1Thank You

    ANSWER

    • Posted by Pratima Sinha 7 years, 3 months ago

    CBSE > Class 07 > Science
    • 2 answers

    Harsheen Kaur 7 years, 3 months ago

    People use the parts that grow above the ground to make medicine. Dodder is used to treat urinary tract, spleen, and hepatic disorders

    1Thank You

    Joshita Murudi 7 years, 3 months ago

    Cuscata plant is used for treating constipation,liver,spleen diseases, diarrhoea, inflammation etc.

    2Thank You

    ANSWER

    • Posted by Deba Mardi 7 years, 3 months ago

    CBSE > Class 07 > Science
    • 2 answers

    Harsheen Kaur 7 years, 3 months ago

    Alveoli are the tiny air sacs at the end of the smallest air passages in the lungs. There are millions of alveoli in each lung. Oxygen particles from the air seep through the walls of the alveoli into blood vessels, to be taken to the heart. The blood also passes carbon dioxide to the alveoli, to be breathed out

    0Thank You

    K S 7 years, 3 months ago

    Alveoli helps in change of gas.

    0Thank You

    ANSWER

    • Posted by Vandana Gupta 7 years, 3 months ago

    CBSE > Class 07 > Science
    • 3 answers

    Sandhya Pathak 7 years, 3 months ago

    Things which are sour in taste ars called acids Things which are bitter in taste and feels soapy on touch are called base and the substance which are made by the reaction of acid and base are called salt

    2Thank You

    Himanshu Sharma 7 years, 3 months ago

    Acid- acids are bitter in taste base- base are sour in taste

    4Thank You

    Ramanti Nuwal 5 years, 9 months ago

    You can find these definations on revision notes

    1Thank You

    ANSWER

    • Posted by Ritika . 7 years, 3 months ago

    CBSE > Class 07 > Science
    • 2 answers

    Surya Parkash Kal Kal 7 years, 3 months ago

    Two organisms which live in close physical and are of mutual benefit to each other are called symbiosis. This process is called symbiotic relationship. Eg. Algae and Fungi.

    0Thank You

    Best Player 7 years, 3 months ago

    It is a type of relationship which is mutually beneficial for both the partener. Eg-Lichens are combination of algae and fungi. The fungus holds the alga cells in its mat of web-like hyphae and supplies water and dissolved minerals and in return get food from the algae.

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    • Posted by Arham Sheik 7 years, 3 months ago

    CBSE > Class 07 > Science
    • 2 answers

    Krisha Zala 7 years, 3 months ago

    Mouth , buccal cavity , oesophegas, stomach small intestine in small intestine there is three parts jejunum lleum diodinam and large colon cecum an rectum

    0Thank You

    Yogita Ingle 7 years, 3 months ago

    The digestive system of humans is well developed. It consists of the gut or alimentary canal, along with many associated digestive glands. The alimentary canal is divided into mouth, oesophagus, stomach, small intestine, large intestine and rectum.
    Mouth: The food is ingested through the mouth. The mouth contains tongue, teeth and salivary glands. Teeth break the food into smaller particles. This process is called mastication.
    Stomach: It is a muscular J- shaped thick walled bag. Stomach is the widest part of alimentary canal. It receives food at one end from food pipe and opens into the small intestine on the other end.
    Small intestine: The food leaves the stomach at certain intervals of time and enters into the small intestine.
    Large intestine: The digested food enters into large intestine after small intestine. The large intestine is wider and shorter than small intestine. It is about 1.5 metre in length.

    1Thank You

    ANSWER

    • Posted by Tushar Kanojiya 7 years, 3 months ago

    CBSE > Class 07 > Science
    • 1 answers

    Yogita Ingle 7 years, 3 months ago

    1. Respiratory diseases like asthma, bronchitis etc., are very common among these workers. It is beacuse they inhale foul – smelling vapours when the cocoons are undergoing steaming, reeling etc.
    2. Scabies and skin infections are caused as the workers usually dip their hands in boiling water while boiling cocoons. As a result, their skin becomes rough and also blisters are formed on the skin causing peeling of skin. The workers suffer from various skin infections.
    3. Other health problems include headache, fever, back pain, neck pain etc. As the workers sit continuously and work, they may even develop problems in their legs.

    0Thank You

    ANSWER

    • Posted by Amiya Gope 7 years, 3 months ago

    CBSE > Class 07 > Science
    • 1 answers

    Yogita Ingle 7 years, 3 months ago

    Tornadoes are the very fast moving dark cloud in the shape of a funnel. The speed of violent tornadoes may be up to 300km. Tornadoes are as destructive as cyclone. Tornadoes may form within cyclones. Tornadoes are spinning funnel clouds produced by thunderstorm clouds.

    0Thank You

    ANSWER

    • Posted by ????☺☺☺??? ?? 7 years, 3 months ago

    CBSE > Class 07 > Science
    • 1 answers

    Yogita Ingle 7 years, 3 months ago

    Rainwater harvesting is the accumulation and deposition of rainwater for reuse before it reaches the underground.  Generally water collects from rooftops, the land surface or rock catchments using simple techniques such as jars, containers and pots as well as more complex techniques such as underground check dam. Uses of this water include water for garden, water for livestock, water for irrigation, etc. In many places the water collected is just redirected to a deep pit with percolation. Commonly used systems are constructed with three principal components; namely, the catchment area, the collection device, and the conveyance system. The harvested water can be used as drinking water as well as for storage and other purpose like irrigation also.

    0Thank You

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    • Posted by Shivam Raj 7 years, 3 months ago

    CBSE > Class 07 > Science
    • 2 answers

    Suubham Yadav 7 years, 3 months ago

    Every bone is connected

    1Thank You

    Shivam Kumar 7 years, 3 months ago

    Nail is not connected to any other bine

    1Thank You

    ANSWER

    • Posted by Devendra Singh 7 years, 3 months ago

    CBSE > Class 07 > Science
    • 3 answers

    Amiya Gope 7 years, 3 months ago

    We get glucose from indirectly carbohydrate. But instant glucose is the simplest. So we get energy direct and fast.

    1Thank You

    Shivam Raj 7 years, 3 months ago

    Because glucose is simplest form and directly absorb in our blood

    0Thank You

    Krisha Zala 7 years, 3 months ago

    We get instant energy from glucose because glucose does not need any digestion it is directly absorbed into our blood

    0Thank You

    ANSWER

    • Posted by Navya Sebastian 7 years, 3 months ago

    CBSE > Class 07 > Science
    • 1 answers

    Mayank Kumar 7 years, 3 months ago

    Its a saprotroph which forms symbiotic relationship if lives with alga

    2Thank You

    ANSWER

    • Posted by Nikita Giri 7 years, 3 months ago

    CBSE > Class 07 > Science
    • 5 answers

    Shivam Raj 7 years, 3 months ago

    We can't survive only on grass and raw leafy vegetables because our body needs different types of nutrients ??

    1Thank You

    Aaniya Nizami 7 years, 3 months ago

    We cannot survive because green leafy vegetables contain cellulose which is not digest by us.

    1Thank You

    Raj Turi 7 years, 3 months ago

    Go

    1Thank You

    Best Player 7 years, 3 months ago

    Raw , leafy vegetables are source of minerals, cellulose, water and vitamins. But besides these, body need carbohydrates, proteins also. So, survival on raw, leafy vegetables is not possible.

    1Thank You

    Vasudev Tiwari 7 years, 3 months ago

    No we can't survive

    2Thank You

    ANSWER

    • Posted by Prince Narwal 7 years, 3 months ago

    CBSE > Class 07 > Science
    • 0 answers
    ANSWER

    • Posted by Best Player 7 years, 3 months ago

    CBSE > Class 07 > Science
    • 2 answers

    Shivam Raj 7 years, 3 months ago

    Because white colour reflects more heat????

    0Thank You

    Arsheen Mushtaq 7 years, 3 months ago

    It is advised so, because white colour reflects more heat and keeps the wall cool that's why ancient homes have white paint on them.

    1Thank You

    ANSWER

    • Posted by Best Player 7 years, 3 months ago

    CBSE > Class 07 > Science
    • 1 answers

    Shatakshi Mishra 7 years, 3 months ago

    Oscillation /time taken 42/20 1.6 Time period of a pendulam is 1.6 seconds

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    • Posted by Best Player 7 years, 3 months ago

    CBSE > Class 07 > Science
    • 2 answers

    Joshita Murudi 7 years, 3 months ago

    The rusting of an iron object is more in coastal areas than in deserts because the saline water or sea water contains salt that facilitates the process of rusting, whereas in the desert area there are lack of water, even water vapour is not present in the atmosphere. Thus, rusting does not takes place

    1Thank You

    Arsheen Mushtaq 7 years, 3 months ago

    In comparison to the desert rusting is faster in coastal areas because they are nearer the oceans so, salt and water content is higher while in desert areas, the conditions are much drier.

    0Thank You

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    • Posted by Best Player 7 years, 3 months ago

    CBSE > Class 07 > Science
    • 4 answers

    Deepak Adhikari 7 years, 3 months ago

    Villi

    0Thank You

    K S 7 years, 3 months ago

    Villi

    0Thank You

    Shivam Raj 7 years, 3 months ago

    Villi

    0Thank You

    Anju Maurya 7 years, 3 months ago

    Villi

    0Thank You

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    • Posted by Rabindra Kumar Patra Rabindra Kumar Patra 7 years, 3 months ago

    CBSE > Class 07 > Science
    • 2 answers

    Deepak Adhikari 7 years, 3 months ago

    True

    0Thank You

    Shivam Raj 7 years, 3 months ago

    True???

    0Thank You

    ANSWER

    • Posted by Diksha Y 7 years, 3 months ago

    CBSE > Class 07 > Science
    • 1 answers

    Yogita Ingle 7 years, 3 months ago

    1. Be thorough with the Exam Pattern: It is really important to know that what you are preparing for before you write your exam.
    2. Be sure about the Syllabus: Syllabus is the first step to start preparation plan.
    3. Practice Multiple Choice Questions (MCQ): The question are very tricky in MCQs so you have to very careful when you practice them.
    4. Refer to NCERT Books Mainly: NCERT books are the backbone of your subjects and topics. You must refer to NCERT books for understanding the topics. After that, solve questions from other books with MCQ questions and sample papers.
     

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