Navigation: Then and Now
Post on 14-Jan-2016
DESCRIPTIONNavigation: Then and Now. Enduring Understanding. Explorers use navigation to get from one place to another. Essential Questions:. How do people get from one place to another? What tools were used in the past for navigation? What tools are used currently for navigation?. Brainstorm. - PowerPoint PPT Presentation
Navigation: Then and Now
Enduring UnderstandingExplorers use navigation to get from one place to another.
Essential Questions:How do people get from one place to another?
What tools were used in the past for navigation?
What tools are used currently for navigation?
BrainstormBrainstorm ways that people travel from one place to another today as compared to the past.Restart VideoPause Video
Tools of Ancient NavigationMapsCompassHourglassBinnacle boxQuadrantKnots cylinderLead LineAstrolabeNavigation has examples of these tools.
MapsMaps have been used for centuries to help travelers reach their destination.Ancient maps used:LatitudeDegreesCardinal directionsTry the Anchors Aweigh:Longitude Mapping Game.
Consider theFollowing Questions:How can maps be used today?How have maps evolved?What do different maps show?
Pause VideoRestart Video
Suggested Activities Compare a map from Columbuss voyage to a map from today.Plot the locations of various points using the maps.Plot Columbuss voyage to the new world.
Suggested ActivitiesCreate a map of your neighborhood.
Compare your map to a key map of that same area to see the difference between the map designs.
CompassThe compass was used to guide travelers on their journey.
Ancient compasses pointed to magnetic north not true north.Read more on Understanding and Using a Compass.
Compass ActivitiesCompare compasses of the past with compasses of today.
Write a paragraph about the differences between the two and how the compass has been improved.Pause VideoRestart Video
HourglassUsed to keep time aboard ship.Explorers were able to track their location by knowing the time and the distance they traveled. Find out more about The History of the Hourglass.
Hourglass ExplorationUse plastic soda bottles and sand to create your own hourglass.Brainstorm ways that watches have replaced the use of hourglasses.
How was the Binnacle Box Used with the Hourglass?Inside the Binnacle box there is a compass. The compass helps in steering the boat in the right direction. The Binnacle box has half hour time periods marked on the top.
QuadrantThis tool was used by Christopher Columbus.It used the suns position to determine latitude.Ptolemys Ptools discusses how Columbus used a Quadrant.
Knots CylinderCalculates distance in a set amount of time.
Knots per HourTHINK ABOUT ITHow were the knots calculated?
Calculate knots per hour.
Check up :How to Calculate KnotsUse a thirty second time period to calculate knots.There is a knot every 51 feet.There are 120 thirty second time intervals per hour.So. 120 x 51 = 6,120 feet per hour or 1 nautical mile per hour
Lead lineThe lead line was used to make maps. Used to measure depth.Collected samples from ocean bottom to help explorers determine location.
AstrolabeUsed by Portuguese to determine latitude of navigation.It measures the angle between the horizon and Polaris (North Star).
New Developmentsin NavigationTechnology is a dominant part of todays navigation.
Todays navigation is still based on mathematics.
Global Positioning SystemUses satellites 11,000 miles from Earth.To get a latitude and longitude reading you need information from three satellites.Information gathering is much much more reliable and faster.Visit GPS Explained for more information.
BrainstormThink of the advances in navigation that you saw in this video.
With advancing technology, what could be some possible tools of navigation for the future?
Moving MapShows where you are and where you are going on an actual map.See Moving Map with Touch Screen Control to see an example.
AssessmentWhat are some innovative ways of assessing student understanding of the differences and similarities between ancient and modern navigation?