Lesson plan on Capillarity

1. LESSON PLAN
Name of teacher : RESHMA.T
Name of School : Govt V&HSS Pirappancode
Subject : Chemistry
Unit : States of matter
Lesson : Capillarity
1
Standard : IX
Division : D
Strength :
Duration : 40mnts
Date : 20.08.2014
Curricular Statement : Pupil are made aware of the concept of capillarity
through observation discussion and experimentation.
Content Analysis :
Terms : Capillarity, Capillary rise.
Facts : Mercury is a liquid metal.
Mercury shows capillary falls.
Atomic number of mercury is 80.
Mercury has high cohesion
Concept : Capillary rise; the upward movement of liquids through small
Capillary tubes. This property of liquid is called capillarity.
Learning Outcomes :
a. Knowledge : The pupil recalls mercury is a liquid metal.
The pupil recognize features of mercury.
b. Understand : The pupil identify situations in which capillarity appears.
The pupil try to find out an outline for capillary rise.
c. Apply : The pupil apply the concept of capillarity in new or unfamiliar
situations.
d. Analyse : The pupil distinguish between capillarity and capillary rise.
predict the nature of capillarity of various liquids.

2. e. Evaluate : The pupil construct new things about capillarity and capillary
rise.
The pupil arrange liquids in the increasing order of cohesion.
f. Create : The pupil try to create new dimensions for capillarity and
2
capillary rise.
Pre-requisite : Adhesion, Cohesion, Viscosity.
Teaching Learning Resources :
1. Tray, glass tube.
2. Fountain pen and white paper.
3. Glass slide and ink.

3. Classroom interaction procedure Actual/Expected
3
response
Posing the problem :
Appu is a 10yr old boy. He is curious about
Everything. On one summer holiday he was walking
Through the courtyard, he saw a farmer ploughing
His land . He noticed the time was summer season. He
Think why the farmer plough the land during this
Summer. Can you help him to find a solution?
Consolidation :
During summer seasons there is a chance to vaporize the water
present in the soil. To avoid this, people plough the field during
summer seasons.
 Capillarity [BB] : Liquids rise upward through small tubes
or holes against gravity. Such property of liquids is called
capillarity.
ACTIVITY 1
To explain the concept of capillarity the teacher demonstrates an
activity. He writes on the wall using the fountain pen.
Discussion points :
1. How does the ink in the pen move upwards?
2. Does the ink move downwards due to its weight?
3. How can we write using a fountain pen?
Consolidation :
The ink moves upward due to capillarity. The process in which ink
moves upward through small holes against gravity is called
capillarity.
ACTIVITY 2
To explain the concept of capillary rise the teacher demonstrate an
experiment. Put two glass slides together and immersed it in a
beaker containing colored water.
Discussion points :
1. What are the changes observed?

4. 4
2. What is the reason?
Consolidation : The upward movement of a liquid against the
force of gravity inside narrow spaces and thin tubes is called
capillary rise. This property of liquid is called capillarity.
ACTIVITY 3
To establish the relationship between capillary rise and diameter
of the capillary tube, the teacher demonstrates an experiment. He
immersed two capillary tubes having various diameters in the
water and ask the students to observe it.
Discussion points :
1. What are the changes observed in the case of capillary
tubes?
2. Can you find any relationship between capillary rise and
diameter of the capillary tube?
Consolidation :
Capillary rise increases with respect to decrease in the diameter of
the tube.
ACTIVITY 4
To establish a clearcut concept of capillarity all students the
teacher introduce chalk lamp to the students (a lamp lighted using
chalk and kerosene)
Consolidation:
Chalk lamp work using the principle of capillarity. The kerosene
in the lamp move upwards through the chalk due to capillarity.
Because the chalk contains numerous holes.

5. BLACK BOARD SUMMARY
Date CHEMISTRY Std : IX D
5
Str :
STATES OF MATTER
CAPILLARITY
The upward movement of aliquid against the force of gravity inside
narrow spaces and thin tubes is called capillary rise. This property is
called capillarity.
Mercury-Capillary rise.

6. 6
REVIEW
 Define capillarity and capillary rise.
 Explain the relationship between capillary rise and diameter of the tube.
FOLLOW UP ACTIVITY
 What is the reason behind the smoothness of cotton cloths?