# How does the size of a leaf affect transpiration experiment?

## How does the size of a leaf affect transpiration experiment?

The larger the boundary layer, the slower the rates of transpiration. Boundary layers increase as leaf size increases, reducing rates of transpiration as well. For example, plants from desert climates often have small leaves so that their small boundary layers will help cool the leaf with higher rates of transpiration.

## What is relation between transpiration and the surface area of leaves?

More leaves (or spines, or other photosynthesizing organs) means a bigger surface area and more stomata for gaseous exchange. This will result in greater water loss. More stomata will provide more pores for transpiration. A leaf with a bigger surface area will transpire faster than a leaf with a smaller surface area.

Why is it important to calculate the surface area of a leaf in transpiration?

Plants have a mechanism of regulating CO2 intake and water vapour escaping called transpiration. Hence, the leaf area helps to estimate the scope of transpiration process in a plant. Leave area measurement helps farmers and crop scientists to know how plants are adapting to the environment.

What is the control in the transpiration experiment?

The room temperature plant is the control in the experiment. The wind blowing on the plant should have caused evaporation to increase in the plant causing more transpiration. The heat hitting the plant increased the amount of water pulled in by the plant because it increased the rate of evaporation on the leaves.

### How does surface area affect transpiration in plants?

The average loss of water for a larger leaf is approximately 9.83mm/day. Therefore this proves that the larger the surface area on a leaf the higer the amount of water loss through the more stomata, thus the faster rate of transpiration.

### How does the surface area of a leaf affect photosynthesis?

Light is absorbed by leaves and differences in surface area exposed to light can change the rates of photosynthesis. Carbon dioxide is absorbed into a leaf through stomates, which are found on its surface.

What factors affect transpiration?

The rate of transpiration is affected by several factors, including:

• temperature.
• humidity.
• wind speed.
• light intensity.

Why do windy conditions increase the rate of transpiration?

It is easier for water to evaporate into dryer air than into more saturated air. Wind and air movement: Increased movement of the air around a plant will result in a higher transpiration rate. Wind will move the air around, with the result that the more saturated air close to the leaf is replaced by drier air.

#### How do plants show transpiration?

1. Take the well watered potted plant and cover it with the rubber sheet. The aerial parts of the plant should be left uncovered.
2. Put the plant on the glass plate and cover with the bell jar.
3. Prepare a same setup but without a plant in the second bell jar.
4. Place the apparatus in sunlight for sometime.

#### How does leaf shape affect photosynthesis?

A leaf’s design must be open enough to capture sunlight for all-important photosynthesis. It also needs to make sure a leaf is shaped in a way that ensures the pores — called stomatae — can soak up enough carbon dioxide, which helps fuel that process.

How do leaves increase surface area?

Most leaves are broad and so have a large surface area allowing them to absorb more light. A thin shape means a short distance for carbon dioxide to diffuse in and oxygen to diffuse out easily. This chemical gives the leaves their green colour and transfers light energy to chemical energy.

How do plants increase transpiration?

Plants transpire more rapidly in the light than in the dark. This is largely because light stimulates the opening of the stomata (mechanism). Light also speeds up transpiration by warming the leaf. Plants transpire more rapidly at higher temperatures because water evaporates more rapidly as the temperature rises.

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