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by Procheta Mallik

Introduction

Place a leaf in hot water and observe the emergence of bubbles through its stomata. See if this happens with cold water

Tools

Parts

    • Be careful while heating and using hot water

  1. Put a fresh leaf in a transparent glass of hot water; the water should be about 60 degrees Celsius. You should observe some bubbles emerging from the leaf and coming up to the surface of the water. This emergence of air bubbles  demonstrates the presence of pores in the leaf. These pores are called Stomata.
    • Put a fresh leaf in a transparent glass of hot water; the water should be about 60 degrees Celsius.

    • You should observe some bubbles emerging from the leaf and coming up to the surface of the water.

    • This emergence of air bubbles demonstrates the presence of pores in the leaf. These pores are called Stomata.

    • Thanks to the hot water, the air inside the leaf will expand when heated, so the extra volume of air is pushed out of the stomata.

    • Note : The bubbles are observed only on the lower side of the leaf but not on the upper side (fig-3), since the number of stomata are more on the underside of the leaf.

  2. Take a glass full of cold water. Take a leaf and immerse it into the cold water in the glass.
    • Take a glass full of cold water.

    • Take a leaf and immerse it into the cold water in the glass.

    • There should not be any emergence of bubbles

    • The cold/room-temperature water doesn't expand the air in the leaf, so none of it is ejected through the pores

Finish Line

Kailash NR

Member since: 05/02/2017

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