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Posted by Prabhat Kumar 5 years, 1 month ago
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Yogita Ingle 5 years, 1 month ago
- The change in which the molecular composition is completely altered and a new product is formed is called a chemical change.
- Chemical changes create a new product.
- The changes in Chemical change are irreversible and permanent.
Examples of Chemical Change
- Burning of wood or paper
- Burning of camphor
- Souring of milk
- Burning of candle
- Digestion of food
Gaurav Seth 5 years, 1 month ago
A change leading to the production of a new substance is known as a chemical change. These changes are irreversible. Some of the chemical changes occurring in our day to day life include rusting of iron, silver jewellery getting tarnished or copper articles getting covered by green layer.
Posted by Prabhat Kumar 5 years, 1 month ago
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Yogita Ingle 5 years, 1 month ago
- Grass eating animals like cows, buffaloes are called ruminants because they have a separate part of stomach called rumen .They quickly swallow the grass and is stored in rumen where it is partially digested forming cud.
- Rumination is the process by which cud returns to the mouth in small lumps and then the animal chews it.
- Grass contain cellulose which is digested by special bacteria present in a sac like structure located between small intestine and large intestine.
Gaurav Seth 5 years, 1 month ago
- Grass eating animals like cows, buffaloes are called ruminants because they have a separate part of stomach called rumen .They quickly swallow the grass and is stored in rumen where it is partially digested forming cud.
- Rumination is the process by which cud returns to the mouth in small lumps and then the animal chews it.
Posted by Prabhat Kumar 5 years, 1 month ago
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Yogita Ingle 5 years, 1 month ago
There are various sources of water. About 97% of the water on the Earth’s surface is covered with water. The three main sources of water are:
- Rainwater.
- Groundwater – This includes water bodies like Wells and Springs.
- Surface water – This includes different water bodies like Sea, Oceans, Reservoirs, Rivers, Streams, Ponds, Lakes and Tanks.
Posted by Prabhat Kumar 5 years, 1 month ago
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Meghna Thapar 5 years, 1 month ago
A battery is a device consisting of one or more electrochemical cells with external connections for powering electrical devices such as flashlights, mobile phones, and electric cars. There are some other types of Secondary Batteries but the four major types are: Lead – Acid Batteries. Nickel – Cadmium Batteries. Nickel – Metal Hydride Batteries. Lithium – Ion Batteries.
Posted by Prabhat Kumar 5 years, 1 month ago
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Yogita Ingle 5 years, 1 month ago
Instruments like vernier calliper, metric rulers, scales and measuring tapes are commonly used to measure length
Posted by Prabhat Kumar 5 years, 1 month ago
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Yogita Ingle 5 years, 1 month ago
True, Chemicals like chlorine (Chlorine dioxide) and ozone (in the pharmaceutical industry) are commonly used to disinfect water.
Posted by Prabhat Kumar 5 years, 1 month ago
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Posted by Prabhat Kumar 5 years, 1 month ago
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Yogita Ingle 5 years, 1 month ago
False, Formation of manure from leaves is a chemical change.
Posted by Prachi Rajawat 5 years, 1 month ago
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Yogita Ingle 5 years, 1 month ago
The soil profile is the collective name for layers of soil. The layers are known as called horizons and their physical, chemical and biological characteristics differ from the layers above and beneath. The layers of soil are the soil profile.
Posted by Prabhat Kumar 5 years, 1 month ago
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Gaurav Seth 5 years, 1 month ago
True
The gallbladder stores the bile juice temporarily because the bile is stored in it until the food material reaches the stomach. The gallbladder is a small pouch which is present just under the liver. Gall bladder has a significant role in the digestion of food. It is a balloon shaped organ reserved for the storage of substance formed by the liver.
Posted by Sachidanand Bebarta 5 years, 1 month ago
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Yogita Ingle 5 years, 1 month ago
a) Inhalation is the action of taking in air rich in oxygen. During inhalation, the rib cage moves outwards and the diaphragm contracts to move downwards. As the rib cage expands, the space in the chest cavity increases allowing air rich in oxygen enter the lungs.
b) Exhalation is the action of giving out air rich in carbon dioxide to the environment. During exhalation, the ribs move inwards and the diaphragm relaxes to return to its normal position. The contraction of rib cage reduces the size of the chest cavity. Now air rich in carbon dioxide is driven out of the lungs.
Vedanshi Singh 5 years, 1 month ago
Posted by Aarushi Patil 5 years, 1 month ago
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Meghna Thapar 5 years, 1 month ago
Decomposers are organisms that break down dead plants or animals into the substances that plants need for growth. Decomposers feed on dead things: dead plant materials such as leaf litter and wood, animal carcasses, and feces. They perform a valuable service as Earth's cleanup crew. Without decomposers, dead leaves, dead insects, and dead animals would pile up everywhere.
Posted by Prachi Rajawat 5 years, 1 month ago
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Gaurav Seth 5 years, 1 month ago
- They have a strong sense of smell and uses its trunk for smell and to hold food.
- They also use their trunk to hold food.
- They have long ears which help them in keeping cool in hot and humid climate.
- Long ears help them in hearing very soft sound.
- They have thick padded feet which help them in moving silently.
Posted by Riddhi Rao Bittoo 5 years, 1 month ago
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Posted by Anurag Sharma 5 years, 1 month ago
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Posted by 💐💐Taniya 💐💐💐 5 years, 1 month ago
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Heer Jayswal 5 years, 1 month ago
Yogita Ingle 5 years, 1 month ago
Heat as a form of energy can be converted to other forms of energy. For example, in motorized vehicles, heat is converted to mechanical energy. In electric bulbs, it is converted to light energy. In thermal power plants, it is finally converted to electrical energy.
Posted by Sachidanand Bebarta 5 years, 1 month ago
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Yogita Ingle 5 years, 1 month ago
The covering of large trees that serve as a roof to shelter an area or other plants in forests is called a canopy.
Anushka Verma 5 years, 1 month ago
Posted by Anurag Sharma 5 years, 1 month ago
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Preet Verma 5 years, 1 month ago
Banajyotsna Moharana 5 years, 1 month ago
Anushka Verma 5 years, 1 month ago
Gaurav Seth 5 years, 1 month ago
In Maths, integers are the numbers which can be positive, negative or zero, but cannot be a fraction. These numbers are used to perform various arithmetic operations, like addition, subtraction, multiplication and division. The examples of integers are, 1, 2, 5,8, -9, -12, etc. The symbol of integers is “Z“.
In terms of sets, the set of integers includes zero, set of whole numbers, set of natural numbers (also called counting numbers) and their additive inverses (-1,-2,-3,-4,-5,..). Integers are the subset of real numbers.
Example of integers: -100,-12,-1, 0, 2, 1000, 989 etc…
As a set, it can be represented as follows:
Z= {……-8,-7,-6, -5, -4, -3, -2, -1, 0, 1, 2, 3, 4, 5, 6, 7, 8,……}
Posted by Diya Ahir 5 years, 1 month ago
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Anushka Verma 5 years, 1 month ago
Kashish Dhoot 5 years, 1 month ago
Yogita Ingle 5 years, 1 month ago
A canopy is mainly formed by tall trees and their cluster. Short trees and shrubs don't form canopies.
Posted by Ansa C Jose 5 years, 1 month ago
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Kashish Dhoot 5 years, 1 month ago
Posted by Ansa C Jose 5 years, 1 month ago
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Posted by Aishvarya Bala 5 years, 1 month ago
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Yogita Ingle 5 years, 1 month ago
The term magnetic effects of current means the current flowing through a wire creates a magnetic field around it. Hans Christian Oersted discovered the magnetic influence of the current in the year of 1820 and noticed that a wire carrying a current could deflect a magnetic needle.
Posted by Parth Bajaj 5 years, 1 month ago
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Posted by Yashkaran Singh 5 years, 1 month ago
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Posted by Prachi Rajawat 5 years, 1 month ago
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Aishvarya Bala 5 years, 1 month ago
Kaushal Kumar 5 years, 1 month ago
Posted by Inchara A Y 5 years, 1 month ago
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Aishvarya Bala 5 years, 1 month ago
Posted by Tejas R 8B 5 years, 1 month ago
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Gaurav Seth 5 years, 1 month ago
Since water is one of the most important compounds needed for various important life processes, a loss of water by transpiration is obviously harmful. This harmful effect becomes dangerous when excessive transpiration leads to the wilting of the plants.Besides wilting, other harmful effects of excessive transpiration include inhibition of protein synthesis and breakdown of proteins and retardation of metabolic processes like photosynthesis. This is the reason why transpiration is often called as a necessary evil.
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Yogita Ingle 5 years, 1 month ago
Distance covered by train S=240 km
Time taken by train to cover this distance t=4 hrs
Thus speed of train v= S/t
∴ v= 240/4 = 60 km/hr
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