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Which stages of the water cycle are directly affected by gravitational force?

Answer and explanation

Correct answer: Precipitation and runoff

Correct answer: B. Gravity pulls water toward Earth. In precipitation, water droplets or ice particles in clouds fall downward as rain, snow or hail when they become sufficiently large. After water reaches the ground, gravity makes it flow from higher land to lower land as surface runoff and helps it move into soil and groundwater. Evaporation in A is mainly driven by heat energy, especially solar energy, not by gravity. Sublimation in C is the direct change of ice into vapour and is caused mainly by energy and environmental conditions. Transpiration in D is the release of water vapour from plant leaves through stomata, also not a downward gravitational movement. Memory cue: gravity makes water fall and flow downhill.

Related tags

GravityPrecipitationRunoffWater-CycleHydrological CycleThe Living WorldBiologyClass 11 Mcq

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