NCERT Solutions for Class 7 Science Chapter 4
Important NCERT Questions
7th Chapter 4 Heat
NCERT Books for Session 2022-2023
CBSE Board and State Board
Questions No: 2
Give two examples each of conductors and insulators of heat.
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Conductors: Copper, aluminum and iron.
Insulators: Wood, water and air.
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Conductors of Heat:
1. Metals: Copper and aluminum are prime examples of excellent heat conductors. Their atomic structure allows for efficient heat transfer due to the free movement of electrons.
2. Silver: Another metal renowned for its high thermal conductivity, often utilized in various applications requiring efficient heat transfer.
Insulators of Heat:
1. Wood: Known for its natural insulation properties, wood traps air within its cellular structure, impeding heat flow and making it a poor conductor.
2. Rubber: Widely used as an electrical insulator due to its ability to resist heat and electricity flow, making it effective in preventing heat transfer.
These materials demonstrate distinct abilities in either facilitating heat transfer efficiently (conductors) or inhibiting heat flow (insulators) based on their molecular structures and capacity to enable or restrict the movement of heat energy.