Ask questions which are clear, concise and easy to understand.
Ask QuestionPosted by Priyanka Behera 6 years, 4 months ago
- 2 answers
Posted by Ivon Ivon Poul 6 years, 4 months ago
- 3 answers
Posted by Gopal Mondal 6 years, 4 months ago
- 1 answers
Yogita Ingle 6 years, 4 months ago
Many might get confused about the difference of a silkworm and a silk moth.
The difference is though a very thin line.
The silkworm on one hand is the caterpillars of moth (which can any of the various numbers present) that produce silk cocoons.
On the other hand when the caterpillar stage can be categorized as silkworm the moth is called silk moth.
Posted by Sanjay Kondre 6 years, 4 months ago
- 2 answers
Gaurav Seth 6 years, 4 months ago
Physical Change:
Change in which only physical properties of a substance change and no new substance is formed is called Physical Change.
Most of the physical changes are reversible, this means we can get the substance back even after the change.
Examples:
Folding of a paper sheet: A paper can be folded or unfolded, and hence it is an example of physical change. Moreover, no new substance is formed in this process, so it is a physical change.
Tearing of paper sheet: Even after being torn in very small pieces; each piece is a piece of paper. Since no new substance is formed in this process, so it is a physical change.
CHEMICAL CHANGE
Changes in which chemical properties of substance change and a new substance is formed are called chemical changes. Some of the chemical changes are irreversible. Even in case of reversible changes in which chemical properties of substance change and a new substance is formed are called chemical changes. Some of the chemical changes are irreversible.
Examples:
Burning of paper, wood, fuel or anything:
When something is burnt, many new substances are formed; especially carbon dioxide is formed in most of the cases. Once something is burnt, the ash or carbon dioxide cannot be turned into the original substance. Hence, burning of anything is chemical and irreversible change.
Melting of wax and burning of wax are different kinds of change. Burning of wax is chemical change while melting of wax is a physical change. Burning of wax is irreversible while melting of wax is reversible.
Posted by Divya Prajapati 6 years, 4 months ago
- 6 answers
Sia ? 6 years, 4 months ago
Cutting of wood is a physical change because only physical property of wood is changed and no new substance is formed.
Posted by Dadaji Bharre 6 years, 4 months ago
- 1 answers
Meghna Thapar 5 years, 10 months ago
Chemical reactions are the processes in which new substances with new properties are formed.
The substances which take place in a chemical reaction are called reactants.
The new substances produced as a result of chemical reaction are called products.
Posted by Nikhil Kashyap 6 years, 4 months ago
- 1 answers
Meghna Thapar 5 years, 10 months ago
A motion could be along a straight line, it could be circular or periodic. An object is said to be in motion when its position changes with time. However, an object is said to be at rest if it does not change its position with time.
Posted by Prithika Aakash 6 years, 4 months ago
- 1 answers
Yogita Ingle 6 years, 4 months ago
Chandigarh is unlikely to be effected by a Cyclone because it is not near to the a big water body like sea or ocean..
Posted by Alex Xsingha 6 years, 4 months ago
- 1 answers
Posted by Fida Fatgima 6 years, 4 months ago
- 0 answers
Posted by Vani Shri 6 years, 4 months ago
- 1 answers
Yogita Ingle 6 years, 4 months ago
When a solution of acid is mixed with the solution of base, both of them neutralize each other and a third substance; called salt; is formed. Such phenomenon is called neutralization or neutralization reaction. The solution formed because of mixing of solution of acid and base is neither acidic nor basic in nature. Such solution is known as neutral solution.
Acid + Base → Salt + Water
Posted by Aauysh Nayak 6 years, 4 months ago
- 4 answers
Sumitra Devi 6 years, 4 months ago
Posted by Ashvinikumar Singh 6 years, 4 months ago
- 2 answers
Manthan Agrawal 6 years, 4 months ago
Gaurav Seth 6 years, 4 months ago
Saliva is a clear liquid made by several glands in your mouth area. Saliva is an important part of a healthy body. It is mostly made of water. But saliva also contains important substances that your body needs to digest food and keep your teeth strong
Posted by Shahina Hami 6 years, 4 months ago
- 3 answers
Anuj Bansal 6 years, 4 months ago
Posted by Shahina Hami 6 years, 4 months ago
- 1 answers
Sia ? 6 years, 4 months ago
Atom is the smallest particle of a chemical element that can exist.
Posted by Bhargav Rokkam 6 years, 4 months ago
- 2 answers
Posted by Kiran Kanwar 6 years, 4 months ago
- 4 answers
Bhargav V 6 years, 4 months ago
Parneet Kaur 6 years, 4 months ago
Yogita Ingle 6 years, 4 months ago
Litmus solution is obtained from lichens. This solution is used as an indicator to distinguish between acids and bases. Acids turn blue litmus solution red aijd bases turn red litmus solution blue.
Rama Krishna 6 years, 4 months ago
Posted by Priyanshu Kushwaha 6 years, 4 months ago
- 1 answers
Yogita Ingle 6 years, 4 months ago
The rainwater percolated through the soil is collected in the layer of soil called bedrock.The reservoir of rainwater accumulated in this layer of soil is called groundwater.The level of this groundwater is known as water table.
Posted by Nidhi Talokar 6 years, 4 months ago
- 1 answers
Posted by Keshav Jaiswal 6 years, 4 months ago
- 3 answers
Yogita Ingle 6 years, 4 months ago
The apex of the leaf is modified to the lid of pitcher in pitcher plant. Pitcher plants are basically a type of carnivorous plants which have modified leaves known as pitfall traps. It have a prey-trapping mechanism featuring a deep cavity filled with digestive liquid. The traps of what are considered to be "true" pitcher plants are formed by specialized leaves.
Posted by Janakiram Kattamanchi 6 years, 4 months ago
- 2 answers
Shahina Hami 6 years, 4 months ago
Yogita Ingle 6 years, 4 months ago
Sericulture involves rearing of silkworms to obtain silk from them. Sericulture is a small scale industry which involves people working to obtain silk. Silk worm is reared right from its egg stage cocoons are collected. These are boiled in hot water to kill the worms in it. Silk coiled in the cocoon is collected, washed, dyed, reeled onto threads.These silk threads are used to weave cloth form them.
Posted by Onkar Padale 6 years, 4 months ago
- 1 answers
Posted by Shivam Raj Kumar 6 years, 4 months ago
- 1 answers
Yogita Ingle 6 years, 4 months ago
- Government should forecast cyclones 24 hours in advance with the help of satellites and radars.
- Cyclone and Tornado shelters should be made for people living in cyclone prone areas. These are rooms made underground and away from shores having no windows.
- Quick communication to government agencies, fishermen, ports to make necessary arrangements and minimize destruction.
- As an individual, when cyclone or a tornado strikes, take shelter under tables, bow down and protect head and neck using arms.
- Keep away from water in cyclone-hit areas as the water might be contaminated.
- Stay inside houses.
- Should not ignore warnings from meteorological department.
- Should have all emergency numbers.
- Avoid driving on roads full of water as the roads might be damaged or the vehicle may get stuck with water going inside the machinery.
- Cyclone/Tornado can cause damage to electric poles and it may cause short circuit and electric shocks.
- Cooperate and help others.
Posted by Shalini Ragit 6 years, 4 months ago
- 2 answers
Yogita Ingle 6 years, 4 months ago
The scientific name for a mulberry tree depends on the species: a red mulberry is Morus rubra, a white mulberry is Morus alba and a black mulberry is Morus nigra. There is also a variant on white mulberry, Russian mulberry, called Morus alba tatarica.
Posted by Ajay Ansari 6 years, 4 months ago
- 1 answers
Yogita Ingle 6 years, 4 months ago
Nitrogen is an important element for all living organisms. Plants obtain nitrogen through a natural process. Nitrogen is introduced to the soil by fertilizers or animal and plant residues. Bacteria in the soil convert the nitrogen to ammonium and nitrate, which is taken up by the plants by a process of nitrogen fixation.
All plants need nitrogen to make amino acids, proteins and DNA, but the nitrogen in the atmosphere is not in a form that they can use.
Posted by Anjali Mathur 6 years, 4 months ago
- 1 answers
Yogita Ingle 6 years, 4 months ago
Percolation literally means to filter through when passed through some porous material or substance while absorption simply means absorbing of any liquid by any absorbent.
Percolated liquid= total liquid passed- liquid absorbed by the absorbent.
Posted by Manish Khodiyar 6 years, 4 months ago
- 2 answers
Posted by Kesar Mathur 6 years, 4 months ago
- 0 answers
Posted by Kaviya5 Surya2 6 years, 4 months ago
- 1 answers
Yogita Ingle 6 years, 4 months ago
Step I: The first step is the removal of the fleece of the sheep along with a thin layer of skin. This process is termed as shearing. The hair provides woollen fibres that are then processed to obtain woollen yarn.
Step II: The sheared fleece is systematically washed in tanks in order to remove the grease, dust and dirt. This is known as scouring.
Step III: The scoured hair is then sorted and sent to a factory where hair of different textures are separated or sorted.
Step IV: Here the small fluffy fibres, called burrs, are separated from the hair and the hair is scoured again and dried. The wool is then ready to be drawn into fibres.
Step V: The fibres are dyed into various vibrant colours because the natural colour of the fleece is black, brown or white.
Step VI: The fibres are then straightened, combed and finally rolled into yarn. The longer fibres are made into wool for sweaters whereas the shorter fibres are spun and woven into woollen cloth.
Posted by Manasvi Verma 5 years, 8 months ago
- 0 answers
myCBSEguide
Trusted by 1 Crore+ Students
Test Generator
Create papers online. It's FREE.
CUET Mock Tests
75,000+ questions to practice only on myCBSEguide app
Chandan Singh 6 years, 4 months ago
0Thank You