Mnemonics : Heat Transfer in Nature | Science (Curiosity) Class 7 - New NCERT PDF Download

​Heat Transfer Processes

1. Mnemonic: “Conduction – Direct Contact Does the Trick”

• Conduction → Direct Contact
• Explanation: Heat travels through solids by direct contact. In metals, vibrating particles pass energy along without moving from place to place.

2.  Mnemonic: “Convection – Currents Carry Heat”

• Convection → Currents
• Explanation: In liquids and gases, heat moves as warm, less dense particles rise and cooler, denser particles sink, forming currents.

3. Mnemonic: “Radiation – Rays Race Through Space”

• Radiation → Rays Race
• Explanation: Heat travels in waves through space without any medium. For example, sunlight reaches Earth via radiation.

Overall Mnemonic to remember Heat Transfer Processes : Pan Cooking is C.C.R” – Conduction, Convection, Radiation

• Conduction: Heat moves from flame to pan
• Convection: Water circulates inside pan
• Radiation: Heat felt around the pan

Explanation: All three types work when you heat water in a pan.

Sea Breeze and Land Breeze

Sea Breeze Mnemonic : Cool Sea Comes During Sun
Mnemonic Explanation: Cool air from sea comes during the day (sun is out), Warm air rises over land → cool air from sea replaces it

Land Breeze Mnemonic : Lazy Land Blows at Moonlight
Mnemonic Explanation: Cool air from land blows to sea at night (moon is out), Warm air over sea → cool land air moves in

Water Cycle

Mnemonic : “E.C.P.T.I.R” – Every Cloud Produces The Important Rain

• Every - Evaporation
• Cloud - Condensation
• Produces - Precipitation
• The - Transpiration
• Important - Infiltration
• Rain - Runoff

Explanation: 

• During summer, snow and ice melt due to the Sun’s radiation, forming rivers that flow into oceans. Fresh snow replenishes the ice in winter.
• Water in oceans, rivers, and lakes evaporates due to the Sun’s heat. Plants also release water vapor through transpiration.
• Water vapor rises, cools, and condenses to form clouds. Clouds cause precipitation (rain, snow, hail).
• This continuous movement of water—evaporation, condensation, precipitation, infiltration, and runoff—is called the water cycle

Seepage of Water Beneath the Earth's Surface

Mnemonic : “Gravel Slips, Sand Sips, Clay Clings”

• Gravel: Water slips through quickly
• Sand: Water sips through slowly
• Clay: Water clings, moves very slowly

Explanation: Based on particle size and pore space, affecting infiltration speed.