What is Transpiration — Passage and Quiz

Transpiration is the process by which plants release water vapor into the atmosphere through tiny pores in their leaves called stomata. It is a key part of the water cycle and helps regulate the Earth’s climate.

During transpiration, plants absorb water from the soil through their roots. This water travels up the stem and evaporates from the leaves. Transpiration cools plants, much like sweating cools humans, and helps transport nutrients from the soil to the leaves.

Transpiration also contributes to humidity and cloud formation. In forests, large amounts of water vapor released by trees can lead to local rainfall. This process is especially important in tropical rainforests, where transpiration helps maintain high levels of precipitation.

However, transpiration can be affected by factors like temperature, humidity, and soil moisture. In dry conditions, plants may close their stomata to conserve water, reducing transpiration rates.

Understanding transpiration is important for agriculture, as it affects crop water needs and irrigation practices. Scientists use tools like lysimeters to measure transpiration rates and improve water management.

Fun fact: A single large tree can transpire up to 100 gallons of water per day, releasing it into the atmosphere!