A Shadowy Tale
description
Transcript of A Shadowy Tale
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A Shadowy Tale
• Amit• Deepak• Sajin• Satish• Danish
Class VIIIKishore Bharati School
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Objective• How to determine the height of a
telephone pole or a tree or a big building without climbing the top.
• How to apply the concept of Ratio-Proportion in our day to day life.
• How the concept of graph help us to find a relationship between two objects/events.
• Some in depth knowledge about important places in our city.
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• We worked in a group of five.
• We researched over internet to find ways to resolve the problem.
• We interviewed masons to understand their ways of measurements.
• We visited different famous monuments and towers of our city.
• We collected information relevant to our project.
Procedure
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• Measuring Tape
• Sunshine
Tools Used
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Activity 1
• We first chose two friends from our group and measured their heights and the length of their shadows at 11.00 a.m.
• Then we recorded those data in a table as shown below :-
Sl. No.
Name of the Students
Height In cm
Length of the Shadow in cm
1 Amit 160.02 76.2
2 Deepak 162.56 78.2
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• Then we put the measurements of height and length of shadow of the 1st boy (Amit) & the length of the shadow of the 3rd boy (Sajin) in the given formula, in order to find the height of the 3rd boy as shown below.
• Formula:- Height of the 1st boy Height of the 3rd boy (x)
=
Length of the shadow of 1st boy Length of the shadow of 3rd boy
Height of the Sajin (x) = (160.02X78) /76.2
= 163.8cm
Similarly ,
Height of the Satish=(162.56x75)/78.2
=155.91cm
Activity 2
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Activity 3
Sl.No.
Name of the Students
Length of the shadow in cm.
calculated Height in cm.
3 Sajin 163.8 78
4 Satish 155.91 75
Similarly we measured the length of shadow of Satish & calculated his height & tabulated it:-
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0
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Amit Deepak Sajin Satish
Length of theshadow
Height
Measurementin cm
Height Vs Length of Shadow
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Activity 4• Next day we divided ourselves in groups and went to visit some famous local
monuments like Victoria Memorial, Shahid Miner & Calcutta TV tower, exactly at 11.00 am & there we measured the shadows of those monuments using measuring tape & noted down those data in the following way:-
• Place – Kolkata• Time – 11.00 a.m.
Sl.no. Name of place Length of shadow
Calculated Height
1 Victoria Memorial 2670cm 5607cm.
2 Shahid minar 2285cm. 4798.5cm
3 Golf Green TV tower 827cm. 1736.7cm
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We, then, collected the following information from net.• Original height of Victoria Memorial=5608.32cm
• Original height of Shahid Minar is= 4800cm
• Original height of Kolkata TV tower is=1737.36cm
Activity 5
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Vic
toria
Mem
oria
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Sah
id M
inar
T.V
.Tow
eroriginal height
calculated height01000200030004000
5000
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original height
calculated height
Hei
ght
in c
ms
Original Vs Calculated Height
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What did we get?
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name of places
me
as
ure
me
nt
in c
m
Length of theshadow
calculated Hheight
Original Height
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Findings• We realised that there is a definite relation between
height of an object & their shadow at a particular time (morning, noon, evening).
• We understood that , how the theoretical concept of Ratio-Proportion can be applied to real life situation.
• It became clear to us how graphs help us to represent two or more events simultaneously.
• We also understood how graphs help us to compare two or more data & find the error factors.
• Also how it helps us in taking any decisions.• Awareness about the famous places situated in our
city.
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Acknowledgements
• www.mclc.osu.edu
• http://img181.imageshack.us
• www.flickr.com
• http://www.panoramio.com
• http://themut.com
• www.mapsofindia.com
• www.chromasia.com