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Gaurav Seth 5 years, 5 months ago

Exothermic Reaction

The chemical reactions which proceed with the evolution of heat energy are called exothermic reactions.

Examples:

Carbon burns in oxygen to form carbon dioxide and heat energy is produced.

C + O₂ → CO₂ + Heat

Water added to quick lime (calcium oxide), slaked lime (calcium hydroxide) is produced with a lot of heat energy.

CaO + H₂O → Ca(OH)₂ + Heat

ANSWER

Hsjdois

Posted by Tarsem Singh Chandi Preetpal Singh 5 years, 5 months ago

CBSE > Class 06 > Science (OLD)

0 answers

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Harsh sandeep Tippanbone

Posted by Harsh Tippanbone 5 years, 5 months ago

CBSE > Class 06 > Science (OLD)

0 answers

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what are the body building foods

Posted by Sunidhi . 5 years, 5 months ago

CBSE > Class 06 > Science (OLD)

3 answers

Baldev Otaal 5 years, 5 months ago

Proteins are called body building food

Janarthanan R 5 years, 5 months ago

Body building foods

Meghna Thapar 5 years, 5 months ago

Proteins are needed for the growth and repair of our body. The foods which are rich sources of proteins are milk, cheese, pulses, peas, beans, soyabean, groundnut, fish, meat, chicken and eggs. Proteins are termed as ‘body building foods’.

ANSWER

Write the named of four food items obtanined from animals. From which animals are they obtained

Posted by Vinay Sharma 5 years, 5 months ago

CBSE > Class 06 > Science (OLD)

3 answers

Nakshatra Dey 5 years, 5 months ago

Sorry it's wrong Animal provide us various food material Cow - cow milk Han - chicken and egg Ship - ship milk Honey bees - honey Camel - camel milk Fish - fish flash Thank you

Nakshatra Dey 5 years, 5 months ago

Animals provide us various food materials. Cow- cowmilk Hen-chicken and egg

Meghna Thapar 5 years, 5 months ago

Animals provide us various food materials such as milk, eggs, chicken, meat, fish and honey. Goat, camel, cow and buffalo are milk giving animals. The hens provide us chicken and eggs. Milk is an important animal product which can be converted into other useful forms like cheese, butter, cream, curd and ghee.

ANSWER

Somia verma

Posted by Sanjay Kumar Nayak 5 years, 5 months ago

CBSE > Class 06 > Science (OLD)

0 answers

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What are body building foods what are protective food what are test for fat what are test for starch water test for protein

Posted by Sunidhi . 5 years, 5 months ago

CBSE > Class 06 > Science (OLD)

2 answers

Garima Mohal 5 years, 5 months ago

You have coped the same book language sunidhi. Learn to say in your words like me

Gaurav Seth 5 years, 5 months ago

Proteins: Proteins performs the very essential function of helping our body grow and repair itself. These are found in food items such as milk, pulses, eggs, meat etc. Foods containing proteins are called ‘body-building’ foods.

Test for proteins: To test whether a food item contains proteins, first we need to grind it into a paste or powder form and add 10 drops of water. To this mixture when we add 2 drops of copper sulphate solution and 10 drops of caustic soda solution. After a few minutes, if the mixture turns violet, it is indicative of the presence of protein.

Fats: Fats are also responsible for providing energy to our body. In fact, they provide more energy than carbohydrates. The body uses fat as a fuel source. Fats are essential for the absorption of vitamins A, D, E and K in the body. Butter, cheese, oil are all examples of fat-rich foods.

Test for fats: To test for fats, take a small quantity of food item and wrap a piece of paper around it and proceed to crush it. After removing the paper, allow it to dry. If you see a film of an oily patch on the paper when holding it against light, it is proof that the food contains fats.

ANSWER

What are energy giving food

Posted by Sunidhi . 5 years, 5 months ago

CBSE > Class 06 > Science (OLD)

3 answers

Garima Mohal 5 years, 5 months ago

You have copied the same book language Meghna. Learn to say in your words like me

Kumar Rakesh 5 years, 5 months ago

T uv ufcfi fi

Meghna Thapar 5 years, 5 months ago

The main carbohydrate that we eat is starch which is mainly present in wheat and rice. Wheat is used in the preparation of chapatti, bread and noodles. Rice is also used in various dishes such as idli and dosa. Good quantity of starch is also present in potatoes. The common sources of carbohydrates in our diet are cereals (maize, wheat, rice), potato, sweet potato, sugar, jaggery, honey and some fruits like mango, papaya, banana and melon. All carbohydrates provide energy to our body.

Fats provide twice as much energy as that provided by the same amount of carbohydrates. Fat is present in butter, ghee, oils, groundnut etc.

ANSWER

What is sieving??

Posted by Dalia Banerjee 5 years, 5 months ago

CBSE > Class 06 > Science (OLD)

1 answers

Yogita Ingle 5 years, 5 months ago

Sieving is a process by which fine particles are separated from bigger particles by using a sieve. It is used in flour mill or at construction sites. In flour mill, impurities like husks and stones are removed from wheat. Pebbles and stones are removed from sand by sieving.

ANSWER

Surya Palace obtained from plants college

Posted by Sunidhi . 5 years, 5 months ago

CBSE > Class 06 > Science (OLD)

0 answers

ANSWER

Nectar

Posted by Bijoy Debbarma 5 years, 5 months ago

CBSE > Class 06 > Science (OLD)

2 answers

Sakshi Balaji Battalwad 5 years, 5 months ago

The juicy part sucked by bees to make honey

Yogita Ingle 5 years, 5 months ago

Nectar: The juicy sweet liquid secreted by within flowers which is sucked by bees and is made into honey by them

ANSWER

Definition pf nectar

Posted by Bijoy Debbarma 5 years, 5 months ago

CBSE > Class 06 > Science (OLD)

2 answers

Atreyee Datta ?? 5 years, 5 months ago

Nectar is the sweet juice of flowers which is collected by bees and then converted into honey ??

Yogita Ingle 5 years, 5 months ago

Nectar: The juicy sweet liquid secreted by within flowers which is sucked by bees and is made into honey by them

ANSWER

Which of the following food is staple food of India rice wheat barley suji

Posted by Sunidhi . 5 years, 5 months ago

CBSE > Class 06 > Science (OLD)

2 answers

Sunidhi . 5 years, 5 months ago

Thanks

Yogita Ingle 5 years, 5 months ago

The main food that we eat to provide us energy is called staple food. In our country, rice, chapati and bread are staple food.

ANSWER

Which of the following is an omnivorous animal horse crocodile ostrich leopard

Posted by Sunidhi . 5 years, 5 months ago

CBSE > Class 06 > Science (OLD)

2 answers

Sunidhi . 5 years, 5 months ago

Thanks

Yogita Ingle 5 years, 5 months ago

Omnivorous is an animal or person that eats a variety of food both plant and animal origin.

Answer: Ostriches are omnivores, which means they eat both plants and animals.

ANSWER

Give two example of slow changes

Posted by Sonia Verma 5 years, 5 months ago

CBSE > Class 06 > Science (OLD)

1 answers

Gaurav Seth 5 years, 5 months ago

The changes happening over a long period of time are considered as slow changes.

Example : (a) Growing of plants.
(b) Ripening of fruits.

Both of these changes takes a long time to happen.

ANSWER

Do you find that all living beings need the kind of food

Posted by Davinder Singh 5 years, 5 months ago

CBSE > Class 06 > Science (OLD)

2 answers

Sunidhi . 5 years, 5 months ago

Nomen

Yogita Ingle 5 years, 5 months ago

No, all living beings do not need the same kind of food. Some animals eat plants as food, and they are called herbivores. Some animals feed on other animals, and they are called as Carnivores. Some others eat food from plant sources as well as animals, and such living beings are called omnivores.

ANSWER

write down the chemical reaction of photosynthesis also mention the reactants and products in it

Posted by Muneer Khan 5 years, 5 months ago

CBSE > Class 06 > Science (OLD)

1 answers

Gaurav Seth 5 years, 5 months ago

Photosynthesis reaction involves two reactants, carbon dioxide, and water. These two reactants yield two products, namely, oxygen and glucose. Hence, the photosynthesis reaction is considered to be an endothermic reaction. Following is the photosynthesis formula:

6CO₂ + 6H₂O —> C₆H₁₂O₆ + 6O₂

Unlike plants, certain bacteria that perform photosynthesis do not produce oxygen as the by-product of photosynthesis. Such bacteria are called anoxygenic photosynthetic bacteria. The bacteria that do produce oxygen as a by-product of photosynthesis are called oxygenic photosynthetic bacteria.

ANSWER

Salt sugar different

Posted by Avdhi Sharma 5 years, 5 months ago

CBSE > Class 06 > Science (OLD)

0 answers

ANSWER

both oxygen and carbondioxide gases are partly soluble in water how is this property of these gases helpful to:water animals and water plants

Posted by Sushant Suman 5 years, 5 months ago

CBSE > Class 06 > Science (OLD)

1 answers

Atreyee Datta ?? 5 years, 5 months ago

This gases mix-up with water so, as a result the animals and plants under water can breath-in and so breath-out. ........... From Atreyee Datta.??

ANSWER

History

Posted by Dharamraj Mahato 5 years, 5 months ago

CBSE > Class 06 > Science (OLD)

2 answers

Hema Kotha 5 years, 5 months ago

Anil Dhaka 5 years, 5 months ago

Hello

ANSWER

What Is spinning???

Posted by Shreya Vaghela 5 years, 5 months ago

CBSE > Class 06 > Science (OLD)

4 answers

Shreya Vaghela 5 years, 5 months ago

Thanks u all for giving answer

Atreyee Datta ?? 5 years, 5 months ago

Sorry my answer have a little spelling mistake ? it is not nade it will be made ... Fr. Atreyee Datta ? ?

Atreyee Datta ?? 5 years, 5 months ago

Spinning is a process by which yarn can be nade from fibre ........ From Atreyee Datta ??

Yogita Ingle 5 years, 5 months ago

The process of making yarn from fibres is called Spinning.
In this process, a large number of fibres from a cotton wool are drawn out and gently twisted such that the fibres gel together to form a yarn.
Devices used are takli, Charaka and modern day machines.

ANSWER

What is irreversible chamde defination

Posted by Anushtha Mishra 5 years, 5 months ago

CBSE > Class 06 > Science (OLD)

1 answers

Gaurav Seth 5 years, 5 months ago

Irreversible changes : The changes in which the matter cannot be brought back to its original state are known as irreversible changes . For example , burning of paper changes it into ash and smoke. Paper cannot be obtained back from ash and smoke .

ANSWER

What are phosphorous

Posted by Gauranshi Singh 5 years, 5 months ago

CBSE > Class 06 > Science (OLD)

1 answers

Mokshit Mrinal Sen 5 years, 5 months ago

Phosphorus is a kind of mineral which is essential for our daily diet. A lot of Phosphorus can be found underground. Food items like whole grains, nuts and dry fruits, chicken, seafood and Dairy products are rich in phosphorus.

ANSWER

Which of the following is not a main component (nutrient) of our food?

Posted by Princy Patel 5 years, 5 months ago

CBSE > Class 06 > Science (OLD)

1 answers

Senthilkumar Ramalingam 5 years, 5 months ago

Ah its very simple ,

ANSWER

Which of the non living thing listed below were once part of living thing

Posted by Ritan Sanphui 5 years, 5 months ago

CBSE > Class 06 > Science (OLD)

1 answers

Meghna Thapar 5 years, 5 months ago

The non-living things which were once a part of living things are butter, leather, wool, cooking oil, apple, and rubber. Butter is made from milk, which is obtained from dairy animals. Viruses are infectious agents with both living and nonliving characteristics. They can infect animals, plants, and even other microorganisms. Some examples of non-living things include rocks, water, weather, climate, and natural events such as rockfalls or earthquakes. Living things are defined by a set of characteristics including the ability to reproduce, grow, move, breathe, adapt or respond to their environment.