Difference between revisions of "The Earth-Our Living Planet"
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*'''Question Corner''' | *'''Question Corner''' | ||
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| − | + | ==Key Idea 2 - Longitude and time zones == | |
| + | What is a longitude? Why do we need Longitudes? | ||
| + | How many time zones does India have? How many does USA have? why is there a difference? | ||
| + | Russia has the highest number of contiguous time zones (nine). Why? | ||
===Learning objectives=== | ===Learning objectives=== | ||
| − | + | Purpose of having longitudes | |
| − | + | Idea of time zones from longitudes (why do we need time zones?) | |
| + | Longitudes are 'half curves' meeting at the two poles (Latitudes are full curves, encircling the earth at that plane) | ||
===Notes for teachers=== | ===Notes for teachers=== | ||
| − | + | Longitudes are not lines but curves | |
| + | Longitudes are imaginary curves, created for enabling tracking of time across the earth | ||
| − | + | ===Activity No 1- See video on Time zones and discuss === | |
| + | {{#widget:YouTube|id=X1DkiuaFCuA}} | ||
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{| 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;"> | ||
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*'''Assessments - incorporating elements of CCE''' | *'''Assessments - incorporating elements of CCE''' | ||
*'''Question Corner''' | *'''Question Corner''' | ||
| + | #If the earth was not rotating on its axis,would there be any need for time zones and longitudes? | ||
| + | # If the earth was not revolving around the sun, would there be any need for time zones and longitudes? | ||
| + | # List as many differences between latitude and longitude as possible. Explain these differences | ||
| − | ==Key Idea | + | ==Key Idea 3 - 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=== | ||
| + | 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. | |
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| + | A video explaining the concept of date line | ||
| + | {{#widget:YouTube|id=hPpWCTHjzQI}} | ||
| − | ===Activity No | + | ===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'''See video on International date line, shown on this page. |
*'''Relevant local connections - people, places and materials''' | *'''Relevant local connections - people, places and materials''' | ||
*'''Website interactives/ links''' | *'''Website interactives/ links''' | ||
| − | *'''Process''' | + | *'''Process''' Demonstrate the International date line on the Marble atlas. Move the earth from west to east to simulate the rotation of the earth. Explain why the date line is needed and why it is not 'straight' |
*'''What questions can you ask''' | *'''What questions can you ask''' | ||
| − | *'''Assessments - incorporating elements of CCE''' | + | *'''Assessments - incorporating elements of CCE'''The questions in the question corner test the understanding of the date line concept and can form part 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? | ||
| + | # The date line is to a large extent over the ocean (water body) and very less on Land. What is the benefit of this? | ||
= Project Ideas = | = Project Ideas = | ||
| + | Have any countries shifted from one side of the international date line to the other? Why? | ||
= Community Based Project = | = Community Based Project = | ||
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Revision as of 11:55, 20 June 2014
| Philosophy of Social Sciences |
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Concept Map
Textbook
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Additional References
How the topic is discussed in NCERT Books
Useful websites
Pages from Wikipedia relating to this chapter
- http://en.wikipedia.org/wiki/Earth
- http://en.wikipedia.org/wiki/Latitude
- http://en.wikipedia.org/wiki/Longitude
- http://en.wikipedia.org/wiki/Continent
- http://en.wikipedia.org/wiki/Ocean
- http://en.wikipedia.org/wiki/Arctic_Ocean
- http://en.wikipedia.org/wiki/Atlantic_Ocean
- http://en.wikipedia.org/wiki/Indian_Ocean
- http://en.wikipedia.org/wiki/Pacific_Ocean
- http://en.wikipedia.org/wiki/Time_zone
- http://en.wikipedia.org/wiki/Date_line
Reference Books
Teaching Outlines
The chapter discusses how the concept of latitude and longitude is used to 'logically' divide the earth. Each location on the earth can be uniquely located, if we have the latitude and longitude of that place
The implications of these two concepts are very important to understand
Key Idea - Latitude
What are latitudes? Why do we need latitudes? What kind of information can we deduce from latitude information?
Learning objectives
Notes for teachers
Activity No 1- Using Marble to study Latitudes
- Estimated Time 1 period
- Materials/ Resources needed Computer/Laptop with Marble educational tool installed. (Ubuntu Kalpavriksha contains Marble) + Projector to show the class
- Prerequisites/Instructions, if any
- Multimedia resourcesSee video on International date line, shown on this page.
- Relevant local connections - people, places and materials
- Website interactives/ links
- Process Demonstrate Latitude on the Marble atlas. Move the earth from west to east to simulate the rotation of the earth. Move the Earth 'top down' and 'bottom up' also upside down to show Arctic Circle in the bottom. Explain 'north' and 'south' are only conventions and not 'up' and 'down'
- What questions can you ask
Why do we need the concept of Latitudes? What physical features depend on latitude? Does weather/climate depend on Latitude? What do we mean when we say 'the sun is above Tropic of Cancer on June' and above 'Tropic of Capricorn' in December? Why does Bangalore have peak summer during March-April, while Delhi has peak summer in June? Are Latitudes lines? Are they parallel lines? Are latitudes parallel to one another?
- Assessments - incorporating elements of CCEThe questions in the question corner test the understanding of the Latitude concept and can form part of CCE*Question Corner
Activity No #
- Estimated Time
- Materials/ Resources needed
- Prerequisites/Instructions, if any
- Multimedia resources
- Relevant local connections - people, places and materials
- Website interactives/ links
- Process
- What questions can you ask
- Assessments - incorporating elements of CCE
- Question Corner
Key Idea 2 - Longitude and time zones
What is a longitude? Why do we need Longitudes? How many time zones does India have? How many does USA have? why is there a difference? Russia has the highest number of contiguous time zones (nine). Why?
Learning objectives
Purpose of having longitudes Idea of time zones from longitudes (why do we need time zones?) Longitudes are 'half curves' meeting at the two poles (Latitudes are full curves, encircling the earth at that plane)
Notes for teachers
Longitudes are not lines but curves Longitudes are imaginary curves, created for enabling tracking of time across the earth
Activity No 1- See video on Time zones and discuss
- Estimated Time
- Materials/ Resources needed
- Prerequisites/Instructions, if any
- Multimedia resources
- Relevant local connections - people, places and materials
- Website interactives/ links
- Process
- What questions can you ask
- Assessments - incorporating elements of CCE
- Question Corner
- If the earth was not rotating on its axis,would there be any need for time zones and longitudes?
- If the earth was not revolving around the sun, would there be any need for time zones and longitudes?
- List as many differences between latitude and longitude as possible. Explain these differences
Key Idea 3 - 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
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
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.
A video explaining the concept of date line
Activity No 1 - Using Marble educational software to explain the International Date Line
- Estimated Time 1 period
- Materials/ Resources needed Computer/Laptop with Marble educational tool installed. (Ubuntu Kalpavriksha contains Marble) + Projector to show the class
- Prerequisites/Instructions, if any
- Multimedia resourcesSee video on International date line, shown on this page.
- Relevant local connections - people, places and materials
- Website interactives/ links
- Process Demonstrate the International date line on the Marble atlas. Move the earth from west to east to simulate the rotation of the earth. Explain why the date line is needed and why it is not 'straight'
- What questions can you ask
- Assessments - incorporating elements of CCEThe questions in the question corner test the understanding of the date line concept and can form part of CCE
- 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?
- The date line is to a large extent over the ocean (water body) and very less on Land. What is the benefit of this?
Project Ideas
Have any countries shifted from one side of the international date line to the other? Why?