Water, water.. everywhere!
Ms. Katie Harmon
Overview
• Content Area: Geography (oceans)
• Grade Level: 3rd
• Summary: The purpose of this instructional PowerPoint is to give
students knowledge about early and current methods of mapping the
world and its oceans.
• Learning Objective: Given multiple sources of information, students
will answer follow-up questions about mapping with 85% accuracy.
• Content Standard: 3.03 Demonstrate how to identify and locate major
physical and political features on globes and maps.
• Accomplishment: d. Explain how change affects region and place over
time.
Facts
• Follow these links to read about some of the earliest
maps. http://kids.britannica.com/comptons/article204246/maps-and-globes
• http://math.rice.edu/~lanius/pres/map/maphis.html
• (Take notes from the first site and on the maps from
200 B.C. and the 16th century in the 2nd site)
Video
• Watch this video. Write down your
observations about where salinity is highest
and lowest on Earth (you can use North, South,
East, and West to describe).
• http://www.youtube.com/watch?v=fBvju47V
W1k
Ways we can map the oceans
• A globe is a round model of the Earth. One advantage of using a
globe is having true scale. One disadvantage is not being able to see
all of the parts of the world at once.
• Scale is the way that mapmakers reduce the real size of land
masses, oceans, rivers, and other landforms to sizes that fit on a
map or globe.
• A flat map is another way to see the world's land masses and
bodies of water. One advantage of using a flat map is being able to
see the whole world at one time. Because the world is round and
not flat, a flat map can not show the exact scale of the shape or size
of the land and water areas. This is one disadvantage of using a flat
map.
Who was the Greek man that accurately calculated the
circumference of the earth using angle measures?
A. Aristotle
B. Eratosthenes
C. Archimedes
D. Pericles
Way to go!
• While virtually all the names mentioned were
great minds of the past, Eratosthenes was the
man who calculated the circumference of the
Earth.
What was the name of the map which allowed
mariners to sail to their destinations by following the
rhumb line?
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•
•
•
A. Newton’s Postulation
B. The Greenwich prime meridian
C. The Mercator Projection
D. MapQuest
Correct!
• The Mercator Projection is the only answer
which made sense (Newton didn’t have a
map, and MapQuest wasn’t around in the 16th
century).
Which answer below includes one advantage of a
globe, and one disadvantage of a flat map?
• A. Globes don’t allow you to see all of the Earth at once;
Flat maps can show you the whole Earth at once.
• B. Globes are a to scale representation of Earth; Flat
maps can’t show water and land to scale.
• C. Globes are a to scale representation of earth; Flat
maps are the prettiest.
Great job!
• A Globe is a great to-scale mapping tool. A Flat
map can be good when looking at the Earth as
a whole, but is not to scale.
Summary
• Today you learned about some of the earliest
forms of mapping, a few observations from
the world’s oceans, and advantages or
disadvantages of two mapping techniques.
• After this interactive PowerPoint, you should
all be able to understand differences in map
types, and recall when major changes
happened in map “history”.
Let’s go back and try that again.
References
• http://office.microsoft.com/enus/images/results.aspx?qu=maps&ex=1#pg:6|
• http://office.microsoft.com/enus/images/results.aspx?qu=salt&ex=1#ai:MC900199230|
• http://office.microsoft.com/enus/images/results.aspx?qu=ocean&ex=1
• http://www.studyzone.org/testprep/ss5/b/comcontocintrol.cfm
• http://en.wikipedia.org/wiki/Eratosthenes
• http://en.wikipedia.org/wiki/Mercator_projection
• http://en.wikipedia.org/wiki/Globe
• http://avagabonde.blogspot.com/2010_01_01_archive.html
• http://office.microsoft.com/enus/images/results.aspx?qu=celebration&ex=1