Page 9 - ..Science E-book Prim.6 2024-2025 1st term part2_Neat - Copy
P. 9
Factors affecting the movement
of water
Thermal energy
Gaining or losing energy affects the water molecules in the air.
? The movement of air from one place to another in the presence of
difference in temperature leads to evaporation and condensation.
Condensation and freezing When water molecules
lose thermal energy
Melting, evaporation and transpiration When water molecules
gain thermal energy
Evaporation Transpiration 10% of water vapor in air
comes from transpiration
Sun heats water in A type of evaporation
oceans, seas, lakes, by which the plant
rivers, streams. loses the excess water
Water evaporates through stomata on
into water vapor leaves in the form of
water vapor
? Thermal energy leads to: melting of ice, evaporation of water, transpiration,
formation of wind current that leads to water movement & transfer of energy.
7
Second Term
