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Ask QuestionPosted by Aayush Ghodke 4 years, 5 months ago
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Posted by Debangshu Roy 4 years, 5 months ago
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Yogita Ingle 4 years, 5 months ago
A mixture of sand, salt and iron isseparated. A magnet is used to extract the iron filings, and water is added to the mixture so that it can be filtered to extract the sand. Overall, the separation is not perfect, but most of each substance is extracted.
Posted by Rajdev Singh 4 years, 5 months ago
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Sadhana Singh 4 years, 5 months ago
Gaurav Seth 4 years, 5 months ago
The vitamins are natural and essential nutrients, required in small quantities and play a major role in growth and development, repair and healing wounds, maintaining healthy bones and tissues, for the proper functioning of an immune system, and other biological functions. These essential organic compounds have diverse biochemical functions.
Posted by Debangshu Roy 4 years, 5 months ago
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Yogita Ingle 4 years, 5 months ago
Milk is a suspension of tiny droplets of oil (cream) in a watery liquid. The process of centrifugation is used to separate cream from milk. The milk is put in a close container in big centrifuge machine. When the centrifuge machine is switched on, the milk is rotated (or spun) at a very high speed in its container. The centrifugal force acts on the milk and due to this, the milk separates into cream and skimmed milk. The cream, being lighter, floats over the skimmed milk and can then be removed.
Posted by Angle Star 4 years, 5 months ago
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Gaurav Seth 4 years, 5 months ago
Nylon It is the first fully synthetic fibre made by man without using any natural raw material. It is made up of the repeating units of a chemical called an amide.Nylon is a polyamide (which is a polymer) Nylon is a thermoplastic polymer ie which can be melted by heating.Molten nylon is forced through the tiny holes in a spinneret to make fibres or cast into desired shapes.
Posted by Sparsh Rawat 4 years, 5 months ago
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Posted by Manpreet Kaur?? 4 years, 5 months ago
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Posted by Saima Kausar 4 years, 5 months ago
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Sadhana Singh 4 years, 5 months ago
Atreyee Datta ?? 4 years, 5 months ago
Yogita Ingle 4 years, 5 months ago
Materials which don't allow light to pass through them completely are called Opaque objects. Objects on the other side of opaque objects cannot be seen at all. Eg: Wood, metals etc.
Posted by Sakshi Balaji Battalwad 4 years, 5 months ago
- 5 answers
Sadhana Singh 4 years, 5 months ago
Angle Star 4 years, 5 months ago
Atreyee Datta ?? 4 years, 5 months ago
Ramzi Zahid 4 years, 5 months ago
Yogita Ingle 4 years, 5 months ago
- Materials which allow light to pass through them completely are called Transparent objects. Objects on the other side of Transparent objects can be seen clearly. Eg: Glass, water and air.
- Materials which don't allow light to pass through them completely are called Opaque objects. Objects on the other side of opaque objects cannot be seen at all. Eg: Wood, metals etc.
- Materials which allow light to pass through them partially are called Translucent objects. Objects on the other side of translucent objects can be seen but not very clearly.Eg: Oily paper, certain types of designed glass, tissue paper etc
Posted by Nicole Khuraijam 4 years, 5 months ago
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Atreyee Datta ?? 4 years, 5 months ago
Yogita Ingle 4 years, 5 months ago
Examples of Physical Change
- Breaking/Crushing of any Object
- Expansion of Metal on Heating
- Dissolving Sugar or Salt (Solute) in Water (Solvent) (as a result, a solution is formed)
- Solidification of Molten Metal on Cooling
- Shredding Paper
Posted by Piyush Hire 4 years, 5 months ago
- 2 answers
Akshara Chelawat 4 years, 5 months ago
Gaurav Seth 4 years, 5 months ago
The process by which the synthesis of fabrics takes place from yarns is known as Weaving and Knitting.
Weaving can be defined as the process by which fabrics for making clothes are made. This is done by arranging two set of yarns passing in one direction with the other yarn at right angle to them.
This process is done on looms which can be either power operated or hand operated.
Knitting is the process which is used to make fabric by interlocking the loops of single yarn together by machines or needles. It is made of single yarn running throughout the whole fabric.
Posted by Vikas Samriya 4 years, 5 months ago
- 1 answers
Meghna Thapar 4 years, 5 months ago
In order to classify the material as per its usage, Sorting Material into groups is necessary.
Advantages of Sorting Material
Disposal: For proper disposal of objects, it is important to sort them into groups of biodegradable and non-biodegradable substances. For degradable substances, dry waste and wet waste should also be separated to ensure longer decay time during the transit period. For nondegradable substances, the objects should be sorted into recyclable and nonrecyclable substances, so as to reduce wastage of material.
Storage: In order to allocate suitable containers for storage of objects, it is necessary to sort objects into solid, liquid and gases. For example, vegetables can be carried in cloth bags, but milk and oil cannot. Liquids such as oil and milk can be stored in open mouth containers such as a glass tumbler, but gases such as nitrogen and oxygen cannot be stored as such.
Posted by Kunal Kishor 4 years, 5 months ago
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Posted by Srishti Bhatt 4 years, 5 months ago
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Ananya Prasad 4 years, 5 months ago
Rudraneel Das 4 years, 5 months ago
Posted by Shubhi Vaishnavi Dewangan 4 years, 5 months ago
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Yogita Ingle 4 years, 5 months ago
Acids
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An acid is a chemical substance that has a sour taste.
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Many food items such as lemons, curd, vinegar and orange taste sour because of the presence of acid in them.
Bases
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A base is a chemical substance that has a bitter taste and a soapy texture.
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Bases are found in different substances such as bleach, ammonia, washing powder and soap.
Posted by Manpreet Kaur?? 4 years, 5 months ago
- 5 answers
Ramzi Zahid 4 years, 5 months ago
Sanju Kushwaha 4 years, 5 months ago
Yogita Ingle 4 years, 5 months ago
Carnivorous: Animals which eats other animals as food. For example: Lion, Tiger, Fox, Wolf, Shark etc.
Abhinav Raj Yadav 4 years, 5 months ago
Posted by Manpreet Kaur?? 4 years, 5 months ago
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Atreyee Datta ?? 4 years, 5 months ago
Sanju Kushwaha 4 years, 5 months ago
Yogita Ingle 4 years, 5 months ago
- We know that all living things be it plants and animals need food and water to live on.
- We need food because food gives us energy.
- Food we eat gives our body essential nutrients to help us grow and heal when we are injured or we are ill.
- Thus food keeps us healthey and provide us essential nutrients to fight diseases.
- To prepare a food we need different kinds of ingredients like to cook vegetable curry we need different kinds of vegetables, salt, spices oil and so on
Noori Naaz 4 years, 5 months ago
Posted by Advika Navin 4 years, 6 months ago
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Swapnil Paira 4 years, 5 months ago
Posted by Pratikhya Priyadarsini 4 years, 6 months ago
- 2 answers
Gaurav Seth 4 years, 6 months ago
Carbohydrates mainly provide energy to our body. Fats also give us energy. In fact, fats give much more energy as compared to the same amount of carbohydrates.
Foods containing fats and carbohydrates are also called ‘Energy Giving Foods’.
Posted by Harshal Patil 4 years, 6 months ago
- 1 answers
Meghna Thapar 4 years, 6 months ago
Test for protein:
- Take 2 ml of the given food-stuff solution in a test tube.
- Add a little of dilute sodium hydroxide solution till the mixture clears.
- Then add 2 to 3 drops of copper sulphate solution and shake well.
- If a violet colour appears in the solution, then protein is present in the given food-stuff.
Note: If the food item to be tested is in solid form, then a powder or a paste is made by grinding it and adding few drops of water in a test tube. Afterwards, the test tube is made to shake well to form a solution or suspension.
Posted by Prushti Vachhani 4 years, 6 months ago
- 1 answers
Posted by Prushti Vachhani 4 years, 6 months ago
- 1 answers
Posted by Prushti Vachhani 4 years, 6 months ago
- 4 answers
Yogita Ingle 4 years, 6 months ago
Tomato is a __________of a plant used as vegetable.
Fruit
Posted by Prushti Vachhani 4 years, 6 months ago
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Posted by Prushti Vachhani 4 years, 6 months ago
- 3 answers
Posted by Prushti Vachhani 4 years, 6 months ago
- 2 answers
Yogita Ingle 4 years, 6 months ago
The main sources of our food are __________&_________
Plants and animals
Posted by Prushti Vachhani 4 years, 6 months ago
- 2 answers
Meghna Thapar 4 years, 6 months ago
Sugar is made in the leaves of the sugarcane plant through photosynthesis and stored as a sweet juice in sugarcane stalks. Sugarcane is cut down and harvested then sent to a factory. At the factory, cane juice is extracted, purified, filtered and crystalized into golden, raw sugar. Cane sugar processing consists of the following steps: sugar cane is crushed, the juice is heated and filtered, then sent to a series of crystallisation steps to create crystals of raw sugar, followed by centrifugation to remove any remaining juice or syrup.
Posted by Manpreet Kaur?? 4 years, 6 months ago
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Sadhana Singh 4 years, 5 months ago
Posted by Manpreet Kaur?? 4 years, 6 months ago
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Gaurav Seth 4 years, 6 months ago
We need minerals in our diet to keep our body healthy. Minerals play an important role in the formation of teeth, bones and blood cells and also help in maintaining a normal heartbeat.
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