Transpiration

Open Ended

What do you remember? Describe three things happening in the picture.

Multiple Choice

Why is transpiration important for plants?

• It helps plants absorb sunlight.

• It allows plants to lose excess water and transport nutrients.

• It helps plants produce seeds.

• It protects plants from insects.

Multiple Choice

Which part of the plant is primarily responsible for the evaporation of water during transpiration?

• Leaves

• Roots

• Stem

• Flowers

Open Ended

Explain the process by which water moves from the roots to the leaves in a plant, as shown in the diagrams.

Open Ended

What would happen to a plant if the process of transpiration did not occur?

Multiple Select

Which of the following are involved in the movement of water through a plant during transpiration?

• Xylem vessels

• Stomata

• Phloem

• Spongy mesophyll cells

Multiple Choice

Which of the following is NOT a function of transpiration in plants?

• Transporting mineral ions

• Providing water for photosynthesis

• Producing glucose directly

• Cooling the leaves

Open Ended

Which conditions make washing on the line dry quickly?

Multiple Choice

Which of the following factors increase the rate of transpiration in plants?

• Wind

• High temperatures

• Low humidity

• All of the above

Open Ended

What is meant by a concentration gradient in the context of diffusion?

Multiple Choice

If the concentration gradient is higher, will the particles move more quickly or slowly?

• More quickly

• More slowly

• At the same rate

• They will not move

Multiple Choice

Do plants lose more water when it is hot or cold?

• Hot

• Cold

• Both equally

• Neither

Multiple Choice

Do plants lose more water when it is humid or dry?

• Humid

• Dry

• Both equally

• Neither

Multiple Choice

Do plants lose more water when it is windy or still?

• Windy

• Still

• Both equally

• Neither

Multiple Choice

Do plants lose more water during the day or at night?

• Day

• Night

• Both equally

• Neither

Open Ended

Which conditions cause the plant to lose the most water? Give an explanation for each.

Multiple Choice

Which of the following factors increases the rate of water loss in plants due to a higher concentration gradient?

• High temperature

• High humidity

• Low light intensity

• Low air movement

Multiple Select

Which of the following conditions will result in more water being lost from a plant?

• High temperature

• High light intensity

• High humidity

• High air movement

Multiple Choice

Calculate the rate of water loss from the plant in mm³/s if the volume of water lost was 10 mm³ in 10 minutes.

• 0.0167 mm³/s

• 0.1 mm³/s

• 1 mm³/s

• 0.001 mm³/s

Open Ended

Explain how a potometer is used to measure the rate of water loss from a plant and what precautions should be taken to ensure accurate results.

Multiple Choice

Calculate the rate of water loss from the plant in mm³/s if the volume of water lost was 12 mm³ in 20 minutes.

• 0.01 mm³/s

• 0.6 mm³/s

• 0.02 mm³/s

• 0.001 mm³/s

Open Ended

Why might a plant wilt on a windy day? Use ideas about concentration gradient in your answer.

Multiple Choice

Which of the following best describes the process of transpiration in plants?

• Water evaporates from leaves, travels in xylem tubes, and diffuses into root hair cells.

• Water is absorbed by leaves and stored in the stem.

• Nutrients are transported from the roots to the leaves through phloem.

• Oxygen is absorbed by roots and released through leaves.

Open Ended

What is one question you still have about transpiration or something you would like to know more about?

Multiple Choice

The rate of transpiration of the increase with:

• Increase in humidity

• Increase in wind velocity

• Reduced light intensity

• Increase in the $$CO_2$$  level

Multiple Choice

Most transpiration in herbaceous plant occurs through:

• Stomata

• Lenthicels

• Cuticle

• Hydathodes

Multiple Choice

What is the function of xylem tissue?

• Transports water and minerals salt 
• Control the opening and closing of stoma
• Carry out photosynthesis
• Provide support for young plant

Multiple Select

Which of the following factors can affect the rate of transpiration in plants?

• Humidity

• Wind speed

• Light intensity

• Soil type