Rainfall and Evaporation Dynamics

Kate from MinuteEarth explains that most rain never reaches the ground, as it either falls on oceans or evaporates before reaching land. Computer simulations suggest 40% of rain evaporates mid-air. When rain does reach land, it mostly falls on forests, where trees intercept it. Trees can't absorb water through leaves, so most water drips to the ground, but some evaporates back into the sky. Overall, more than half of the rain over land evaporates, equivalent to 15 Amazon rivers, reducing flooding damage.

What is the primary reason most rain does not reach the ground?

• It is absorbed by clouds.

• It evaporates in the atmosphere.

• It is blocked by mountains.

• It is consumed by animals.

Why is it difficult to measure the amount of rain that evaporates?

• Evaporation happens too quickly to measure.

• Rain gauges cannot be placed at different heights in the sky.

• There is no technology to measure evaporation.

• Rain gauges are not accurate.

What percentage of rain is estimated to evaporate before reaching the ground?

• 30%

• 50%

• 20%

• 40%

Why do trees not directly use the water that falls on their leaves?

• The water is too dirty.

• Trees cannot absorb water through their leaves or bark.

• The water evaporates too quickly.

• The water is too cold.

What happens to most of the water that trees intercept?

• It is stored in the leaves.

• It drips off or runs down to the ground.

• It evaporates immediately.

• It is absorbed through the leaves.

What percentage of rain that falls on treetops evaporates back into the sky?

• 10%

• 15%

• 25%

• 20%

What is the equivalent of the water that flows back into the sky as vapor?

• 10 Amazon rivers

• 12 Amazon rivers

• 15 Amazon rivers

• 20 Amazon rivers

How does the evaporation of rain benefit us economically?

• It boosts tourism.

• It saves billions in flooding damage.

• It reduces the need for irrigation.

• It increases agricultural yield.