Big idea: Earth Scientists use mapping technologies to investigate and describe the world

BIG Idea: Earth Scientists use mapping technologies to investigate and describe the world.

• BIG Idea: Earth Scientists use mapping technologies to investigate and describe the world.

• How can I remember which lines are which?

Because lines of latitude never meet, they are also known as…

• Because lines of latitude never meet, they are also known as…

• Each degree consists of 60 equal parts called minutes.

• Each minute is divided into 60 equal parts called seconds.

Because the Prime MERIDIAN is the main line of longitude, they are also known as…

• Because the Prime MERIDIAN is the main line of longitude, they are also known as…

• As with latitude, there are minutes and seconds: D.C. is 77°0’33” West

any 2 lines of longitude directly across from each other on opposite sides of the globe, or

• any 2 lines of longitude directly across from each other on opposite sides of the globe, or

• the Equator (the only parallel of latitude that forms a great circle)

Both latitude and longitude are needed to locate positions on Earth precisely.

• Both latitude and longitude are needed to locate positions on Earth precisely.

• When giving coordinates, latitude is always given first.

• Do you know the coordinates of Staunton, VA?

Latitude:  38° 8' 57" N 38 degrees, 8 minutes, 57 seconds North

• Latitude:  38° 8' 57" N 38 degrees, 8 minutes, 57 seconds North

• Longitude:  79° 4' 18" W 79 degrees, 4 minutes, 18 seconds West

The distance on Earth's surface for each one degree of latitude or longitude = 69 miles (111 kilometers)

• The distance on Earth's surface for each one degree of latitude or longitude = 69 miles (111 kilometers)

• The distance between lines of latitude remains constant. Why?

• What happens to the distance between lines of longitude as you move north or south of the Equator?

Earth is divided into 24 time zones

• Earth is divided into 24 time zones

• Why 24?

Earth takes about 24 hours to rotate once on its axis (360°)

• Earth takes about 24 hours to rotate once on its axis (360°)

• 360° ÷ 24 hours = 15° per hour

• Each time zone is 15° wide

• Each time zone represents a different hour

180° meridian

• 180° meridian

• gain or lose a day

• travel WEST across the IDL ► advance one calendar day (add 24 hours)

• travel EAST across the IDL ► move back one calendar day (subtract 24 hours)

Maps are flat projections that come in many different forms

• Maps are flat projections that come in many different forms

Legend: list of symbols and their meanings

• Legend: list of symbols and their meanings

• Scale: ratio between distances on a map and actual distances on Earth’s surface

• 1:25,000 - one unit on the map equals 25,000 units on Earth’s surface

Geomagnetic poles: points on the Earth’s surface just above the poles of the imaginary magnet

• Geomagnetic poles: points on the Earth’s surface just above the poles of the imaginary magnet

Magnetic Declination: angle between geographical North Pole and where a compass points to (magnetic north pole).

• Magnetic Declination: angle between geographical North Pole and where a compass points to (magnetic north pole).

• True North: Geographic North Pole

Map projection: a flat map that represents a 3-dimensional globe

• Map projection: a flat map that represents a 3-dimensional globe

Mercator projections show correct shapes of landmasses, but the sizes are distorted…

• Mercator projections show correct shapes of landmasses, but the sizes are distorted…

• What’s wrong with this picture?

What are some surface features on Earth that you might find on a topographic map?

• What are some surface features on Earth that you might find on a topographic map?

mountains

• mountains
• hills
• valleys
• rivers
• forests
• bridges
• depressions

next to

• next to

• adjoining

• abutting

• bordering

1. Contours never cross or just stop

• 1. Contours never cross or just stop

• 2. Contours never split

• 3. The closer they are to each other, the steeper the land

• 4. The further they are from each other the flatter the land

5. If a contour line shows a “V”, the point of the V points UP hill

• 5. If a contour line shows a “V”, the point of the V points UP hill

• 6. A river will always flow in the opposite direction of the V’s point (DOWN hill)

• 7. When contours close in a circle, that represents a hill top

The side-view of a surface feature

• The side-view of a surface feature

Katalog: cms -> lib03
cms -> Alexander III, 1881-1894
cms -> I. Postwar Europe and the Origins of the Cold War
lib03 -> Main Idea- economic & Social in the Old Regime helped cause the French Revolution
lib03 -> Christopher Columbus 1494 founded
lib03 -> N. C. Elementary School 407
lib03 -> European powers competed for trade and colonies around the globe. European powers competed for trade and colonies around the globe
lib03 -> Contents What is Dyslexia?
lib03 -> Materialism
lib03 -> A long narrative poem about a legendary hero. A long narrative poem about a legendary hero