The Complete Note of Heat for Class 8 : Solution
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| Important Question Answeyfor class8 |
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Here are some basic and important notes to understand .
Heat:
- The Hotness or Coldness of a Body is called Heat .
- Heat always flows from hotter body to colder body.
- Heat can be transferred by three Way such as. i) Conduction ii) Convection iii) Radiation
Conduction Of Heat:
=> The movement of heat through a
substance by collision of molecules is
called Conduction of heat.
Conductor and insulator:
=> Conductors are those which allow the flow of heat and electricity but insulators are those which don't allow flow of heat and electricity.
Application of Heat conduction in daily Life:
=>Here are Some applications of heat Conduction:
- Cooking with metal pans and using an insulator for grab handles.
- the heat from a stovetop transferring to a pot filled with water
What is Convection?
=>The process of heat transfer by movement of molecules in fluids such as liquid and gas.
Sea Breeze:
=> Flow of cold air from the seaside to the land side due to the difference in atmospheric pressure during the day time is called sea breeze.
land Breeze :
=> The flow of cold air from landslide to the seaside due to the difference in atmospheric pressure during the night time is called land breeze.
Application of Heat convection :
=> Here are Applications of Heat convection:
- In the refrigerator, cold air moves downwards and replaces warm air .
- Boiling water
- Raining occurs because of convection. Etc
Radiation method Of heat transfer:
=> Process of heat transfer without any medium is called the radiation method Of heat transfer.
Radiation occurs in the form of electromagnetic waves .
What is the application of radiation in daily life?
=> Application of daily life are :
- Radiation plays a vital role in Radiation therapy .
- The plant gets heat by radiation for the growth.
- Human body also gets warmth from the sun by
- radiation.ng occurs because of convection. Etc
Radiation method Of heat transfer:
=>Process of heat transfer without any medium is called the radiation method Of heat transfer.
Radiation occurs in the form of electromagnetic waves .
What is the application of radiation in daily life?
=> Application of daily life are :
- Radiation plays a vital role in Radiation therapy .
- The plant gets heat by radiation for the growth.
- Human body a
- lso gets warmth from the sun by radiation.