2.3.3 Factors Affecting Transpiration

• What is the process called by which plants lose water vapor through their leaves?

  Transpiration
• Light intensity affects transpiration by regulating the opening of stomata.

  True
• Under low light conditions, stomata close
• Describe the relationship between light intensity and transpiration rate.

  High light increases transpiration
• Why does high humidity decrease the transpiration rate?

  Air is saturated with moisture
• Low wind speed results in more humid air near the leaves, causing the transpiration rate to decrease
• What happens to the transpiration rate when the air surrounding the leaves becomes more humid?

  Decreases
• Wind speed influences transpiration rates in plants.


  True
• When wind speed is low, the transpiration rate decreases
• What is the primary function of transpiration in plants?

  Draw water and nutrients
• Arrange the relationship between light intensity, stomata opening, and transpiration rate:

  1️⃣ High light intensity

  2️⃣ Stomata open wider

  3️⃣ Transpiration rate increases
• What happens to the transpiration rate under low temperatures?

  Decreases
• When humidity is high, the stomata open less
• High wind speed reduces humidity near leaves, increasing transpiration.


  True
• Higher rates of evaporation lead to an increase in the transpiration rate.


  True
• High humidity levels result in smaller stomata openings
• What is the primary role of wind speed in transpiration?

  Sweeps away moisture-saturated air
• High wind speed leads to wider stomata openings
• What does soil water availability refer to?

  Water accessible to plant roots
• Low soil water availability causes plants to conserve water by closing their stomata
• Stomata are tiny pores on the surface of leaves
• What two environmental factors do plants respond to when controlling stomatal opening?

  Light and CO2 levels
• High temperature increases the evaporation rate, resulting in greater transpiration
• What are the ideal conditions for maximizing transpiration rates in plants?

  High light, temperature, wind, low humidity
• Transpiration occurs mainly through tiny pores on the leaves called stomata
• What happens to stomata under high light conditions?

  Open wider and more frequently
• How does high light intensity affect the transpiration rate?

  Increases it
• How does low temperature affect the transpiration rate?

  Decreases it
• Low humidity allows for a higher transpiration rate because the air can hold more water vapor.

  True
• What happens to stomata under high wind speed conditions?

  Open wider
• When wind speed is high, the stomata opening becomes wider
• Why do stomata close slightly under low wind speed conditions?

  To conserve water
• Match the part of the plant with its role in transpiration:

  Leaves ↔️ Site of water loss

  Stomata ↔️ Tiny pores controlling water release

  Water Vapor ↔️ Water in gaseous form lost
• Under low light intensity, the stomata close
• Temperature influences transpiration by affecting the kinetic energy of water molecules.


  True
• High temperatures cause the stomata to open
• What is humidity and its role in regulating transpiration?

  Water vapor in air
• Arrange the relationship between humidity level, stomata opening, and transpiration rate:

  1️⃣ High humidity

  2️⃣ Stomata open less

  3️⃣ Transpiration rate decreases
• The air is drier and can hold more water vapor
• Why do stomata open wider when the air is dry?

  To release more water vapor