You are here
In a Nutshell
| NCERT Point | Simple Meaning |
|---|---|
| Heat can be transferred by conduction, convection, and radiation. | Three ways heat moves |
| Conduction is the transfer of heat through solids without movement of the material itself. | Heat moves through solid objects |
| Metals are generally good conductors of heat; wood, plastic, and cloth are insulators. | Metals heat up fast |
| Convection is the transfer of heat in fluids through the movement of the heated material itself. | Hot liquid rises up |
| Radiation is the transfer of heat without any material medium. | Heat travels through empty space |
| Dark and rough surfaces are better absorbers and radiators of heat than light-coloured and shiny surfaces. | Dark things heat up more |
| Sea breeze, land breeze, monsoon winds, and trade winds are large-scale natural phenomena driven by convection. | Wind happens from heat differences |
Quick Revision Table
| Term | Simple Meaning |
|---|---|
| Conduction | Heat moves through solid |
| Convection | Hot fluid rises up |
| Radiation | Heat travels without medium |
| Conductor | Material that allows heat |
| Insulator | Material that blocks heat |
| Convection current | Circular movement of fluid |
| Sea breeze | Cool air from sea |
| Land breeze | Cool air from land |
| Thermal | Rising column of air |
| Thermometer | Device to measure temperature |
