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From Karnataka Open Educational Resources
→Key Idea #
*'''Question Corner'''
*'''Question Corner'''
==Key Idea #==
==Key Idea 2 - International Date Line==
Why do we need a International Date Line?
See http://en.wikipedia.org/wiki/Date_line#mediaviewer/File:Dateline-animation-3deg-borderonly-180px.gif
===Learning objectives===
===Learning objectives===
To understand need for an arbitrary 'date line' which begins a 'new day' at a artificial 'longitudinal' line.
To understand why this line is not 'straight' but changes in many places
===Notes for teachers===
===Notes for teachers===
===Activity No # ===
This is a very difficult concept to understand and may need a physical simulation with a globe for students to understand.
The idea of time varying across longitudes as well as time zones need to be well understood before coming to date line.
===Activity No 1 - Using Marble educational software to explain the International Date Line===
{| style="height:10px; float:right; align:center;"
{| style="height:10px; float:right; align:center;"
|<div style="width:150px;border:none; border-radius:10px;box-shadow: 5px 5px 5px #888888; background:#f5f5f5; vertical-align:top; text-align:center; padding:5px;">
|<div style="width:150px;border:none; border-radius:10px;box-shadow: 5px 5px 5px #888888; background:#f5f5f5; vertical-align:top; text-align:center; padding:5px;">
''[http://www.karnatakaeducation.org.in/?q=node/305 Click to Comment]''</div>
''[http://www.karnatakaeducation.org.in/?q=node/305 Click to Comment]''</div>
|}
|}
*'''Estimated Time'''
*'''Estimated Time''' 1 period
*'''Materials/ Resources needed'''
*'''Materials/ Resources needed''' Computer/Laptop with Marble educational tool installed. (Ubuntu Kalpavriksha contains Marble) + Projector to show the class
*'''Prerequisites/Instructions, if any'''
*'''Prerequisites/Instructions, if any'''
*'''Multimedia resources'''
*'''Multimedia resources'''
*'''Relevant local connections - people, places and materials'''
*'''Relevant local connections - people, places and materials'''
*'''Assessments - incorporating elements of CCE'''
*'''Assessments - incorporating elements of CCE'''
*'''Question Corner'''
*'''Question Corner'''
#Can a plane flying across the earth, move from Monday at the departing location to Tuesday at the arriving location?
#Can a plane flying across the earth, move from Tuesday at the departing location to Monday at the arriving location?
#Can any two places on Earth be on two different (consecutive) days?
#Can any two places on Earth be on two different days, which are not consecutive?
===Activity No # ===
===Activity No # ===
*'''Assessments - incorporating elements of CCE'''
*'''Assessments - incorporating elements of CCE'''
*'''Question Corner'''
*'''Question Corner'''
==Key Idea #==
==Key Idea #==
