https://padlet.com/nehaankur28nov/8tr0dtc554uptg6r revision test en-us 2020-07-17 04:33:14 UTC 2024-12-02 01:59:37 UTC hello@padlet.com nehaankur28nov https://padlet.com/nehaankur28nov/8tr0dtc554uptg6r/wish/656641294 once rahul goes to his village, he saw his grandmother dried pickle in sun rays. he was surprised to see that then his grandmother explain that this is process of food preservation. then he understand the concept behind it.
1. what is food preservation
2. what is pasteurisation?
3. name another method of food preservation
4. write two advantages of food preservation?

case study 2
on a research, it is seen that when iron article exposed in air and moisture then, some brown substance formed on the surface on it.
1. what is rusting of iron?
2.what is the chemical nature of rust
3. why copper becomes greenish in color when exposed to air
4. why silver becomes black in color when exposed to air?

case study 3
on research it conclude that earth attract all objects towards it.
it does not depend uopn its mass. object is either macroscopic or microscopic they also follow force of attraction between them
1. what is force. write its S.I unit
2. what is contact and non contact force
3. what kind of force act between when magnet attract magnetic substance towards it?
 

]]> 2020-07-17 04:34:36 UTC https://padlet.com/nehaankur28nov/8tr0dtc554uptg6r/wish/656641294 https://padlet.com/nehaankur28nov/8tr0dtc554uptg6r/wish/656650324 1. The process in which food save for longer time is called food preservations.
2. .pausteurisation is a process in this  method milk boil at high temperature then  cool it.
3. refiregator , adding chemical
4. It keeps us food healthy for long time.
it stops the wastage of food.




]]> 2020-07-17 04:48:50 UTC https://padlet.com/nehaankur28nov/8tr0dtc554uptg6r/wish/656650324 https://padlet.com/nehaankur28nov/8tr0dtc554uptg6r/wish/656653522 Case study 1
1)Food preservation prevents the growth of microorganisms, or other microorganisms, as well as slowing the oxidation of fats that cause rancidity.
2)Pasteurization is a process of heat processing a liquid or a food to kill pathogenic bacteria to make the food safe to eat. It involves heating the food to kill most harmful microorganisms.
3) Refrigeration, adding chemicals .
4)The advantage of food preservation is to keep food longer, reduce waste.
Case study 2
1) rusting of iron is the process in which iron like object like iron nails are kept in moist air , they get covered with brownlish like substance is called rusting of iron.
2)when iron combines with oxygen and water it forms rust .
3)Copper metal when exposed to air turns green in colour due to corrosion.
4)Silver becomes black because of hydrogen sulfide, a substance that occurs in the air.
Case study 3
1) a pull or a push on an object is called a force . The si unit of force Is newton.
2)contract force - contract forces are force which act only when objects are in physical contract with each other and bring about changes.
Non contract forces - non contract forces are forces which can act even when objects are not in physical contract with each other and bring about changes.]]> 2020-07-17 04:54:04 UTC https://padlet.com/nehaankur28nov/8tr0dtc554uptg6r/wish/656653522 https://padlet.com/nehaankur28nov/8tr0dtc554uptg6r/wish/656653827 The process by which food can be save for long time it is called food preservation ]]> 2020-07-17 04:54:35 UTC https://padlet.com/nehaankur28nov/8tr0dtc554uptg6r/wish/656653827 https://padlet.com/nehaankur28nov/8tr0dtc554uptg6r/wish/656654101 The process in which food save for longer time is called food preservation]]> 2020-07-17 04:55:03 UTC https://padlet.com/nehaankur28nov/8tr0dtc554uptg6r/wish/656654101 https://padlet.com/nehaankur28nov/8tr0dtc554uptg6r/wish/656655324 Neha
.1The process in which food safe for longer time ii called food preservation. 
2.Pasteurisation is the process of milk. 
3. Refrigeration adding chemicals. 
4.To advantage of food preservation is to keep food longer, reduce waste. 

]]> 2020-07-17 04:57:15 UTC https://padlet.com/nehaankur28nov/8tr0dtc554uptg6r/wish/656655324 https://padlet.com/nehaankur28nov/8tr0dtc554uptg6r/wish/656655471
Nikhil Choudhary
1 ) food preservation prevents the growth of microorganism as well as slowing the oxidution  of fats that cause rancidity
2 ) the partial setrilization of a product , such as milk or wines ,to make it safe for consumption and improve it is called pateurisation 
3) fermanitition 
4) the advantage of food preservation is to keep for longer, reduce waste
Case study 2 

]]> 2020-07-17 04:57:29 UTC https://padlet.com/nehaankur28nov/8tr0dtc554uptg6r/wish/656655471 https://padlet.com/nehaankur28nov/8tr0dtc554uptg6r/wish/656655717 Vansh
 Case study-1
 1-  a process by which edible items such as fruits and vegetables are prevented from getting spoilt.
 2. the process of heating up milk to a high temperature for a short time and then cooling it down again quickly.
 3. Farmentation.
 4. a.Food preservation makes up for the deficiencies in the diet
 b. It increases the availability of out of season foodstuffs.]]> 2020-07-17 04:57:51 UTC https://padlet.com/nehaankur28nov/8tr0dtc554uptg6r/wish/656655717 https://padlet.com/nehaankur28nov/8tr0dtc554uptg6r/wish/656656584 Nitesh Attri
The process by which food can be save in long time is called preservation.]]> 2020-07-17 04:59:22 UTC https://padlet.com/nehaankur28nov/8tr0dtc554uptg6r/wish/656656584 https://padlet.com/nehaankur28nov/8tr0dtc554uptg6r/wish/656657759 1)The process in which food save for long period is called food preservation.

]]> 2020-07-17 05:01:43 UTC https://padlet.com/nehaankur28nov/8tr0dtc554uptg6r/wish/656657759 https://padlet.com/nehaankur28nov/8tr0dtc554uptg6r/wish/656657760 1.The process by which food can be save in long time is called preservation.
2..the process of heating up milk to a high temperature for a short time and then cooling it down again quickly.
3...vinegar , common salt and oil etc.
4...The advantage of food preservation is to keep food longer, reduce waste.]]> 2020-07-17 05:01:44 UTC https://padlet.com/nehaankur28nov/8tr0dtc554uptg6r/wish/656657760 https://padlet.com/nehaankur28nov/8tr0dtc554uptg6r/wish/656658011 2020-07-17 05:02:13 UTC https://padlet.com/nehaankur28nov/8tr0dtc554uptg6r/wish/656658011 https://padlet.com/nehaankur28nov/8tr0dtc554uptg6r/wish/656658293 2.Pasteurisation is the process of saving milk]]> 2020-07-17 05:02:44 UTC https://padlet.com/nehaankur28nov/8tr0dtc554uptg6r/wish/656658293 https://padlet.com/nehaankur28nov/8tr0dtc554uptg6r/wish/656658492 Vansh
Case study-2
1. Rusting of iron refers to the formation of rust, a mixture of iron oxides, on the surface of iron objects or structures.
2. Iron oxide
3. Copper metal when exposed to air turns green in colour due to corrosion. When copper vessel is exposed to air in rainy season, the metal reacts with gases and moisture and atmospheric gases to form a mixture of copper carbonate and copper hydroxide. 
4. Silver becomes black because of hydrogen sulfide (sulfur), a substance that occurs in the air. ]]> 2020-07-17 05:03:02 UTC https://padlet.com/nehaankur28nov/8tr0dtc554uptg6r/wish/656658492 https://padlet.com/nehaankur28nov/8tr0dtc554uptg6r/wish/656659640 3.refrigeration , adding chemical]]> 2020-07-17 05:05:15 UTC https://padlet.com/nehaankur28nov/8tr0dtc554uptg6r/wish/656659640 https://padlet.com/nehaankur28nov/8tr0dtc554uptg6r/wish/656660110
1. The brown powdery substance come in metal with the presence of water and air is called rusting of iron.
2.. iron oxide
3. copper metal when come in presence of air turns green in colour due to corrosion 
4.Silver become black in colour bcz in air hydrogen sulphide is present hydrogen sulphide react with silver and turn into black colour]]> 2020-07-17 05:06:01 UTC https://padlet.com/nehaankur28nov/8tr0dtc554uptg6r/wish/656660110 https://padlet.com/nehaankur28nov/8tr0dtc554uptg6r/wish/656660173 Harsh Agrawal]]> 2020-07-17 05:06:08 UTC https://padlet.com/nehaankur28nov/8tr0dtc554uptg6r/wish/656660173 https://padlet.com/nehaankur28nov/8tr0dtc554uptg6r/wish/656660508 2020-07-17 05:06:46 UTC https://padlet.com/nehaankur28nov/8tr0dtc554uptg6r/wish/656660508 https://padlet.com/nehaankur28nov/8tr0dtc554uptg6r/wish/656660527 Shivam Sagar s
1 ans  when an iron object left in damp air for some times and then it covered with brown powdery substance is called rusting of iron. 
2 ans chemical nature of rust is basic 
3 ans copper become greenish when left in air because it react with oxygen and so I become greenish .
4 ans  silver become black when exposed in air because it combines with oxygen and become black in color . ]]> 2020-07-17 05:06:48 UTC https://padlet.com/nehaankur28nov/8tr0dtc554uptg6r/wish/656660527 https://padlet.com/nehaankur28nov/8tr0dtc554uptg6r/wish/656660604 2020-07-17 05:06:57 UTC https://padlet.com/nehaankur28nov/8tr0dtc554uptg6r/wish/656660604 https://padlet.com/nehaankur28nov/8tr0dtc554uptg6r/wish/656661035 1.The process in which Food save four longer time is called food preservation.
2.Pasteurisation is the process of preservation of milk.
4. Advantages of food preservation.
A. It decreases wastage of food by
 avoiding spoilage.
B. It increase storage period of food material.
Case 2
1. When an iron object is left is damp air for considerable time, it gets covered with a reddish-brown flaky substance. This is called" rusting of iron".

]]> 2020-07-17 05:07:45 UTC https://padlet.com/nehaankur28nov/8tr0dtc554uptg6r/wish/656661035 https://padlet.com/nehaankur28nov/8tr0dtc554uptg6r/wish/656661512 (1)It is a process of  preserve fruit and vegetable for long time
(2) pasteurization is a small process in which we preserve milk
(3) refrigeration 
(4) spoilage of food
(5)increased  shelf life ]]> 2020-07-17 05:08:43 UTC https://padlet.com/nehaankur28nov/8tr0dtc554uptg6r/wish/656661512 https://padlet.com/nehaankur28nov/8tr0dtc554uptg6r/wish/656661903 2020-07-17 05:09:26 UTC https://padlet.com/nehaankur28nov/8tr0dtc554uptg6r/wish/656661903 https://padlet.com/nehaankur28nov/8tr0dtc554uptg6r/wish/656662305 3)  Refrigeration,adding chemical]]> 2020-07-17 05:09:52 UTC https://padlet.com/nehaankur28nov/8tr0dtc554uptg6r/wish/656662305 https://padlet.com/nehaankur28nov/8tr0dtc554uptg6r/wish/656662897  anant attri  case study 1and 2]]> 2020-07-17 05:10:39 UTC https://padlet.com/nehaankur28nov/8tr0dtc554uptg6r/wish/656662897 https://padlet.com/nehaankur28nov/8tr0dtc554uptg6r/wish/656663221

1. The push or pull on an object with mass that causes it to change its velocity. SI unit is Newton.
2.A non-contact force is a force which acts on an object without coming physically in contact with it.
A contact force is any force that requires contact to occur. ]]> 2020-07-17 05:11:18 UTC https://padlet.com/nehaankur28nov/8tr0dtc554uptg6r/wish/656663221 https://padlet.com/nehaankur28nov/8tr0dtc554uptg6r/wish/656663277 anant attri case study 3]]> 2020-07-17 05:11:25 UTC https://padlet.com/nehaankur28nov/8tr0dtc554uptg6r/wish/656663277 https://padlet.com/nehaankur28nov/8tr0dtc554uptg6r/wish/656663330 Harsh chaudhary 
1. The process by which the food save for longre time is called presentation.
2. The process of heating up milk to high temperature for short time and then cool it down again it.]]> 2020-07-17 05:11:30 UTC https://padlet.com/nehaankur28nov/8tr0dtc554uptg6r/wish/656663330 https://padlet.com/nehaankur28nov/8tr0dtc554uptg6r/wish/656663773 Kashish]]> 2020-07-17 05:12:12 UTC https://padlet.com/nehaankur28nov/8tr0dtc554uptg6r/wish/656663773 https://padlet.com/nehaankur28nov/8tr0dtc554uptg6r/wish/656663796 Nitesh Attri
Chemical nature of rust is basiv]]> 2020-07-17 05:12:14 UTC https://padlet.com/nehaankur28nov/8tr0dtc554uptg6r/wish/656663796 https://padlet.com/nehaankur28nov/8tr0dtc554uptg6r/wish/656663811 1. the push or a pull of an object is called force . Newton
2. A force in which an object physically contact with it is called non contact force. a contact force is any force that requires contact to occur.
3. Magnetic force


]]> 2020-07-17 05:12:17 UTC https://padlet.com/nehaankur28nov/8tr0dtc554uptg6r/wish/656663811 https://padlet.com/nehaankur28nov/8tr0dtc554uptg6r/wish/656664129 Case study-3
1. The push or pull on an object with mass that causes it to change its velocity. SI unit is Newton.
2.A non-contact force is a force which acts on an object without coming physically in contact with it.
A contact force is any force that requires contact to occur. 
3.Non-contact force.]]> 2020-07-17 05:12:46 UTC https://padlet.com/nehaankur28nov/8tr0dtc554uptg6r/wish/656664129 https://padlet.com/nehaankur28nov/8tr0dtc554uptg6r/wish/656664225 4)The advantage of food preservation is to keep food longer,reduce waste.]]> 2020-07-17 05:12:55 UTC https://padlet.com/nehaankur28nov/8tr0dtc554uptg6r/wish/656664225 https://padlet.com/nehaankur28nov/8tr0dtc554uptg6r/wish/656664603 Harsh Agrawal]]> 2020-07-17 05:13:26 UTC https://padlet.com/nehaankur28nov/8tr0dtc554uptg6r/wish/656664603 https://padlet.com/nehaankur28nov/8tr0dtc554uptg6r/wish/656665168 Harshita singh]]> 2020-07-17 05:14:29 UTC https://padlet.com/nehaankur28nov/8tr0dtc554uptg6r/wish/656665168 https://padlet.com/nehaankur28nov/8tr0dtc554uptg6r/wish/656665212 1 ans  when an iron object left in damp air for some times and then it covered with brown powdery substance is called rusting of iron. 
2 ans chemical nature of rust is basic 
3 ans copper become greenish when left in ]]> 2020-07-17 05:14:34 UTC https://padlet.com/nehaankur28nov/8tr0dtc554uptg6r/wish/656665212 https://padlet.com/nehaankur28nov/8tr0dtc554uptg6r/wish/656665318 4.The advantage of food preservation is to food longer, reduce waste]]> 2020-07-17 05:14:44 UTC https://padlet.com/nehaankur28nov/8tr0dtc554uptg6r/wish/656665318 https://padlet.com/nehaankur28nov/8tr0dtc554uptg6r/wish/656665649 Neha
Case study 2
1.The brown powedry substance  came in metal with the presence of water and air is called rusting of iron. 
2.iron oxide. 
3.copper metal when exposed to air. ]]> 2020-07-17 05:15:19 UTC https://padlet.com/nehaankur28nov/8tr0dtc554uptg6r/wish/656665649 https://padlet.com/nehaankur28nov/8tr0dtc554uptg6r/wish/656665824 Harsh Agrawal]]> 2020-07-17 05:15:38 UTC https://padlet.com/nehaankur28nov/8tr0dtc554uptg6r/wish/656665824 https://padlet.com/nehaankur28nov/8tr0dtc554uptg6r/wish/656666758 Shivam Sagar sahil .
1 ans A push or pull of an object is called force . SI unit – Newton 
2 ans contact force are those in which object are in contact with object and bring about changes 
Non contact force are those in which object are not in contact with each other and bring about changes 
3 ans  magnetic force

]]> 2020-07-17 05:17:12 UTC https://padlet.com/nehaankur28nov/8tr0dtc554uptg6r/wish/656666758 https://padlet.com/nehaankur28nov/8tr0dtc554uptg6r/wish/656667877 (1)Rusting of iron is process in which a new layer in formed when  water and oxygen meets  
(2) iron  oxide 
(4) the silver exposed and meet with  oxygen turns black 


]]> 2020-07-17 05:19:14 UTC https://padlet.com/nehaankur28nov/8tr0dtc554uptg6r/wish/656667877 https://padlet.com/nehaankur28nov/8tr0dtc554uptg6r/wish/656669753 Harshita singh]]> 2020-07-17 05:22:52 UTC https://padlet.com/nehaankur28nov/8tr0dtc554uptg6r/wish/656669753 https://padlet.com/nehaankur28nov/8tr0dtc554uptg6r/wish/656669769 2020-07-17 05:22:53 UTC https://padlet.com/nehaankur28nov/8tr0dtc554uptg6r/wish/656669769 https://padlet.com/nehaankur28nov/8tr0dtc554uptg6r/wish/656669789 Harsh Agrawal]]> 2020-07-17 05:22:55 UTC https://padlet.com/nehaankur28nov/8tr0dtc554uptg6r/wish/656669789 https://padlet.com/nehaankur28nov/8tr0dtc554uptg6r/wish/656669929 Case study 2
1)Rusting of iron is the process in which iron like object like iron nails are kept in moist air, they get covered with brownish like substance is called rusting of iron.
2) When iron combines with oxygen and water it forms rust.
3) Copper metal when exposed to air turns green in colour due to corrosion.
4) Silver becomes black because of hydrogen sulphide, a substances that occurs in the air .]]> 2020-07-17 05:23:13 UTC https://padlet.com/nehaankur28nov/8tr0dtc554uptg6r/wish/656669929 https://padlet.com/nehaankur28nov/8tr0dtc554uptg6r/wish/656670530
1 ans A push or pull of an object is called force . SI unit – Newton 
2 ans contact force are those in which object are in contact with object and bring about changes 
Non contact force are those in which object are not in contact with each other and bring about changes 
3 ans  magnetic force]]> 2020-07-17 05:24:22 UTC https://padlet.com/nehaankur28nov/8tr0dtc554uptg6r/wish/656670530 https://padlet.com/nehaankur28nov/8tr0dtc554uptg6r/wish/656671523 2020-07-17 05:26:19 UTC https://padlet.com/nehaankur28nov/8tr0dtc554uptg6r/wish/656671523 https://padlet.com/nehaankur28nov/8tr0dtc554uptg6r/wish/656672772 Nitesh Attri]]> 2020-07-17 05:28:00 UTC https://padlet.com/nehaankur28nov/8tr0dtc554uptg6r/wish/656672772 https://padlet.com/nehaankur28nov/8tr0dtc554uptg6r/wish/656673728 (1)Apush or pull of object 
(3) contact force ]]> 2020-07-17 05:29:58 UTC https://padlet.com/nehaankur28nov/8tr0dtc554uptg6r/wish/656673728 https://padlet.com/nehaankur28nov/8tr0dtc554uptg6r/wish/656677226 Case study 3
1)A push or pull of an object is called force. The SI unit of force is Newton.
2) Contact force : It is the force which acts on only when objects are in physical contract with each other and bring about changes.
Non- contact force : It is the force which can even act when objects are not in physical contract with each other bring about changes.
3) Magnetic force.]]> 2020-07-17 05:36:50 UTC https://padlet.com/nehaankur28nov/8tr0dtc554uptg6r/wish/656677226