In a Nutshell

Conduction: Transfer of heat from hotter part to cooler part of an object, particle-to-particle, without the particles moving from their positions. Occurs mainly in solids.
Good Conductor: A material that allows heat to pass through it easily. All metals are good conductors.
Poor Conductor (Insulator): A material that does not allow heat to pass through easily. Examples: wood, glass, clay, air.
Convection: Transfer of heat by the actual movement of particles of liquids or gases from a hotter to a cooler region.
Sea Breeze: Movement of cool air from the sea toward the land during the day, caused because land heats up faster than the sea.
Land Breeze: Movement of cool air from the land toward the sea at night, caused because land cools faster than the sea.
Radiation: Transfer of heat from a hot object to a cooler one without any material medium. Works even through vacuum.
Water Cycle: Continuous movement of water — upward as vapour (evaporation, transpiration), downward as precipitation, and through soil as infiltration — redistributing water across the Earth.
Infiltration: Process of surface water seeping through soil and rocks into the ground.
Groundwater: Water stored in the pore spaces of underground sediments and rocks.
Aquifer: Underground layer of sediments and rocks that stores groundwater; source of well and bore-well water.

Class 6