The Earth-Our Living Planet

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Additional References

How the topic is discussed in NCERT Books

Useful websites

Pages from Wikipedia relating to this chapter

  1. http://en.wikipedia.org/wiki/Earth
  2. http://en.wikipedia.org/wiki/Latitude
  3. http://en.wikipedia.org/wiki/Longitude
  4. http://en.wikipedia.org/wiki/Continent
  5. http://en.wikipedia.org/wiki/Ocean
  6. http://en.wikipedia.org/wiki/Arctic_Ocean
  7. http://en.wikipedia.org/wiki/Atlantic_Ocean
  8. http://en.wikipedia.org/wiki/Indian_Ocean
  9. http://en.wikipedia.org/wiki/Pacific_Ocean
  10. http://en.wikipedia.org/wiki/Time_zone
  11. 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 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

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 - 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
  1. Can a plane flying across the earth, move from Monday at the departing location to Tuesday at the arriving location?
  2. Can a plane flying across the earth, move from Tuesday at the departing location to Monday at the arriving location?
  3. Can any two places on Earth be on two different (consecutive) days?
  4. Can any two places on Earth be on two different days, which are not consecutive?


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 #

What are the key ideas to be covered

Learning objectives

Notes for teachers

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


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

Project Ideas

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