WATER CYCLE
What is evaporation?
Water changing from liquid to gas due to heat
What forms when water vapor cools in the air?
Clouds/condensation
Why does UAE need desalination?
Limited rainfall & freshwater resources
Draw evaporation & label energy role.
Heat → kinetic energy → water escapes
What moves air from high pressure to low pressure?
Wind
What is transpiration?
Water vapor released from plant leaves
Why do humid areas form clouds faster?
More water vapor available to condense
How do humans increase evaporation in the UAE?
Using cooling towers, irrigation evaporation, desalination plants
Why does boiling water evaporate faster?
More heat → higher kinetic energy
What is the Coriolis effect?
Curving of winds due to Earth’s rotation
Which process happens faster on a hot day—evaporation or transpiration? Why?
Both increase because heat increases kinetic energy
Describe how condensation depends on evaporation
Evaporation adds vapor; without it clouds can't form
Why do cities with more plants feel cooler?
Transpiration cools air; plants release moisture
Explain how hydrosphere, atmosphere & biosphere interact in transpiration.
Plants (biosphere) absorb water (hydrosphere) → release vapor to air (atmosphere)
Name a major global wind belt.
Trade winds / Westerlies / Polar easterlies
Compare evaporation & transpiration using scientific language.
Both move water to atmosphere; evaporation from surfaces, transpiration from plants
How does transpiration affect local weather?
Adds moisture → increases humidity → can form clouds
Suggest one way UAE can increase water in air naturally.
Plant trees/green belts to increase transpiration
Defend: “The Sun is the engine of the water cycle.
Sun provides energy → drives evaporation & transpiration
Why are trade winds important for the water cycle?
Move moisture and clouds
Explain why evaporation is slower in the evening.
Less solar energy → less kinetic energy for molecules → slower evaporation
Predict weather if evaporation and transpiration suddenly stop.
No clouds, less rain, drought, higher temp swings
Why is managing irrigation important in UAE climate?
Too much water lost to evaporation; must conserve resources
Predict impact if Sun energy decreases for a week.
Low evaporation, low humidity, weak transpiration, fewer clouds, no rain
Explain monsoon winds using scientific language
Seasonal wind reversal due to differential heating of land vs ocean