https://padlet.com/kavitamrisnoida/ucrswj9gdcjg9i58 CHEMICAL AND PHYSICAL CHANGES en-us 2021-07-12 04:34:18 UTC 2021-07-12 05:00:13 UTC hello@padlet.com https://padlet.com/kavitamrisnoida/ucrswj9gdcjg9i58/wish/1645378552 Physical changes: These changes affect the physical nature of the substance. These include boiling , melting, vaporization, freezing etc. Eg: solid to liquid by melting, liquid to gas by evaporation, shredding paper, dry ice sublimation etc.
Chemical changes: These changes affect the chemical nature of the substance. Chemical changes sometimes result in the formation of a new substance and are not reversible. Eg: mixing baking soda and vinegar, buring a paper or wood.]]> 2021-07-12 04:36:44 UTC https://padlet.com/kavitamrisnoida/ucrswj9gdcjg9i58/wish/1645378552 https://padlet.com/kavitamrisnoida/ucrswj9gdcjg9i58/wish/1645378628 Physical changes- It is the change where no new subtance is formed. eg- Melting of Ice, Breaking a glass.
Chemical changens. eg- Rusting, buring etc.]]> 2021-07-12 04:36:48 UTC https://padlet.com/kavitamrisnoida/ucrswj9gdcjg9i58/wish/1645378628 https://padlet.com/kavitamrisnoida/ucrswj9gdcjg9i58/wish/1645378716 Chemical changes:
A) when two substance combine together to form new substance.
B) It is also a permanent change
example: cooking of food, digestion of food.
Physical change: 
a) changes in which no new b)Substance are form. substance color , taste can change . example: ice to water. 

]]> 2021-07-12 04:36:51 UTC https://padlet.com/kavitamrisnoida/ucrswj9gdcjg9i58/wish/1645378716 https://padlet.com/kavitamrisnoida/ucrswj9gdcjg9i58/wish/1645378790 Physical changes- changes in the form of the substance( size or shape of matter) No changes in chemical composition. A reversible change.
Eg- melting of ice due to heat(changing it's state to liquid from a solid)

Chemical changes- Changes in which one or more new substances are formed. It is also called a Chemical Reaction. An irreversible change.
Eg- burning of Magnesium in Air (2Mg+O2--->2MgO)]]> 2021-07-12 04:36:54 UTC https://padlet.com/kavitamrisnoida/ucrswj9gdcjg9i58/wish/1645378790 https://padlet.com/kavitamrisnoida/ucrswj9gdcjg9i58/wish/1645378852 Physical Changes: 
They refer to the appearance of a substance. 
Reversible Change.
Ex-stretching of a rubber band, folding a quilt, boiling water etc.
Chemical Changes: 
They refer to the composition of a substance.
Non-reversible change.
Ex- Burning a paper changes the chemical composition, putting baking soda in lemon juice, putting Mentos in coke etc.]]> 2021-07-12 04:36:56 UTC https://padlet.com/kavitamrisnoida/ucrswj9gdcjg9i58/wish/1645378852 https://padlet.com/kavitamrisnoida/ucrswj9gdcjg9i58/wish/1645378926
Physical Changes-
~ changes in physical properties like shape, size etc.
~ no new substance is formed.
~ usually reversible
~ no changes in chemical properties like chemical composition and molecules.
Eg- tearing of paper, boiling water, chopping wood etc.

Chemical changes-
~ Changes in both chemical and physical properties.
~ a new substance is formed
~ generally irreversible
~ there are changes in chemical properties , resulting in formation of new substances.
Eg- rusting of iron, burning of food or wood etc

]]> 2021-07-12 04:36:58 UTC https://padlet.com/kavitamrisnoida/ucrswj9gdcjg9i58/wish/1645378926 https://padlet.com/kavitamrisnoida/ucrswj9gdcjg9i58/wish/1645379023 Physical  changes: when 2 or more  substances get combined together and do not form any new substance are called physical changes. They are also called temporary changes. They can be converted back into their usual form or get destroyed without forming a new subsatnce. For example, ice-> water-> vapour, melting of chocolate.


Chemical changes:  when 2 or more substances get combined together and form a new substance are called chemical changes. They are also called permanent changes. They are irreversible. For example, cooking of food (forming food) , cutting of paper( paper strips) etc.]]> 2021-07-12 04:37:02 UTC https://padlet.com/kavitamrisnoida/ucrswj9gdcjg9i58/wish/1645379023 https://padlet.com/kavitamrisnoida/ucrswj9gdcjg9i58/wish/1645379444 →Physical changes-
Change is temporary
No new product is formed
No energy change
Eg. melting of ice cube.
→Chemical changes- 
These changes are permanent New product is formed
Energy is absorbed or evolved in this
Eg. baking of cookies.]]> 2021-07-12 04:37:16 UTC https://padlet.com/kavitamrisnoida/ucrswj9gdcjg9i58/wish/1645379444 forummerathore https://padlet.com/kavitamrisnoida/ucrswj9gdcjg9i58/wish/1645379493 A chemical change is a permanent change. and it cannot be reversed A Physical change is temporary and it  affects only physical properties  shape, size, etc.  Some examples of physical change are freezing of water, melting of wax, boiling of water, etc. A few examples of chemical change are digestion of food, burning of coal, rusting, etc.]]> 2021-07-12 04:37:17 UTC https://padlet.com/kavitamrisnoida/ucrswj9gdcjg9i58/wish/1645379493 shreyakashyap5656 https://padlet.com/kavitamrisnoida/ucrswj9gdcjg9i58/wish/1645379668 Physical changes -
- no molecular changes .
- temporary change
-  changes are  physical for ex. shape , size .
- no new substance formed.
- reversible.
- for ex. melting of wax ,  freezing of water etc

Chemical changes -
- molecular change.
- permanent change.
- change in chemical composition .
- new substance formed . 
- irreversible. 
- burning of coal , rusting etc



]]> 2021-07-12 04:37:24 UTC https://padlet.com/kavitamrisnoida/ucrswj9gdcjg9i58/wish/1645379668 https://padlet.com/kavitamrisnoida/ucrswj9gdcjg9i58/wish/1645380157 Physical - When the two substance get combined physically i.e. they can be separated by physical means. They can be reversible as well as irreversible. No new substance is formed Eg:-  bursting of balloon etc.

Chemical - When two substances get combined by chemical means i.e. they cannot be separated by physical means. They are irreversible. New substance is formed. Eg: - burning of combustion 

]]> 2021-07-12 04:37:42 UTC https://padlet.com/kavitamrisnoida/ucrswj9gdcjg9i58/wish/1645380157 https://padlet.com/kavitamrisnoida/ucrswj9gdcjg9i58/wish/1645380426 Chemical changes- when two substance ]]> 2021-07-12 04:37:52 UTC https://padlet.com/kavitamrisnoida/ucrswj9gdcjg9i58/wish/1645380426 https://padlet.com/kavitamrisnoida/ucrswj9gdcjg9i58/wish/1645380668 Arnav Aggarwal
Physical change- when change happens through physical methods. No new product is formed. Eg- crushing of paper, cutting a paper
 
Chemical change- when change happens through chemical methods. New products are formed. Eg- burning of paper]]> 2021-07-12 04:38:00 UTC https://padlet.com/kavitamrisnoida/ucrswj9gdcjg9i58/wish/1645380668 akhtarmisbah03 https://padlet.com/kavitamrisnoida/ucrswj9gdcjg9i58/wish/1645380828 Physical changes:
👉When a substance goes through physical change, its composition stays the same but the molecules get re-arranged.
👉 It is temporary.
👉No new substance is formed.
👉 requires little to no energy.
👉 Examples: Freezing of water, Melting of Wax.

Chemical changes:
👉 When a substance undergoes chemical change, the molecules change completely. 
👉 It is permanent
👉Involves a lot of energy.
👉 New substance is formed. 
👉 Example: Rusting of Iron, Burning of wood. ]]> 2021-07-12 04:38:04 UTC https://padlet.com/kavitamrisnoida/ucrswj9gdcjg9i58/wish/1645380828 https://padlet.com/kavitamrisnoida/ucrswj9gdcjg9i58/wish/1645384547 Shaurya
Physical change - when change happen through physical method 

No new substance is form



Chemical change - when change happen through chemical methods 

New product is formed]]> 2021-07-12 04:40:05 UTC https://padlet.com/kavitamrisnoida/ucrswj9gdcjg9i58/wish/1645384547 https://padlet.com/kavitamrisnoida/ucrswj9gdcjg9i58/wish/1645385991 Physical changes: 
they are temporary, new substance is not formed ,  no energy required , ex - freezing of water ]]> 2021-07-12 04:40:53 UTC https://padlet.com/kavitamrisnoida/ucrswj9gdcjg9i58/wish/1645385991 https://padlet.com/kavitamrisnoida/ucrswj9gdcjg9i58/wish/1645389675 Chemical changes 
Chemical changes occur when a substance combines with another to form a new substance, called chemical synthesis or, alternatively, chemical decomposition into two or more different substances.




Physical changes
Physical changes are changes affecting the form of a chemical substance, but not its chemical composition. Physical changes are used to separate mixtures into their component compounds, but can not usually be used to separate compounds into chemical elements or simpler compounds.]]> 2021-07-12 04:42:47 UTC https://padlet.com/kavitamrisnoida/ucrswj9gdcjg9i58/wish/1645389675 https://padlet.com/kavitamrisnoida/ucrswj9gdcjg9i58/wish/1645391290 Physical Changes :
- temporary
- reversible
-  ex : size

Chemical Changes :
 - permanent
- irreversible
- ex : melting of wax]]> 2021-07-12 04:43:38 UTC https://padlet.com/kavitamrisnoida/ucrswj9gdcjg9i58/wish/1645391290 https://padlet.com/kavitamrisnoida/ucrswj9gdcjg9i58/wish/1645396935 Anish
Physicals changes are temporary where as chemical changes are permanent
No new substance is formed in physical change where as it is formed in a chemical change
No heat is given out in physical change where as heat is given out in chemical change
Eg- mixing of salt and water, heating of a solution of two or more chemical

]]> 2021-07-12 04:46:29 UTC https://padlet.com/kavitamrisnoida/ucrswj9gdcjg9i58/wish/1645396935 https://padlet.com/kavitamrisnoida/ucrswj9gdcjg9i58/wish/1645402748 Physical changes- It is the change where no new substance is formed. eg- Melting of Ice, Breaking a glass.
Chemical change-  When two substances get combined by chemical means i.e. they cannot be separated by physical means. eg- Rusting, buring etc.]]> 2021-07-12 04:49:38 UTC https://padlet.com/kavitamrisnoida/ucrswj9gdcjg9i58/wish/1645402748