Download longitude latitude - Hewlett

Longitude & latitude
Time.
SHAPE
Shape –
• The Earth is not a perfect sphere.
• The Earth is an oblate spheroid.
– This means it is slightly flattened at the poles
and slightly bulging at the equator.
– Polar circumference is slightly smaller than
the Equatorial circumference.
• The Earth DOES NOT look like an egg!
EVIDENCE
Evidence – (Based on assumptions) - INFERENCE
• Weight due to Gravity
– Gravity acts as a stronger force when objects are closer to the
center of the Earth.
– The weight of an object is slightly more at the Poles.
• Explanation – Objects must be closer to the center of the Earth at
the Poles
• Ships “disappear” at the horizon…the last things to see
are the tops of the sails.
►
►
►
Polaris
The North Star (Polaris) never changes its place in the sky. When you
face it, you are always facing North.
To find the North Star, first find the Big Dipper. Draw a straight line
through the two pointer stars that make up the end of the dipper's
bowl and continue this line away from the opening of the bowl until it
intersects with Polaris.
Latitude is based on your angle to Polaris
http://astro.unl.edu/classaction/animations
/ancientastro/dipperclock.html
Astrolabe
► The
astrolabe gives the angle/position of
the Sun and stars in the sky.
Look at the North Star and point one arm straight at
it, and then hold your other arm level with the
horizon. The angle between your arms is roughly the
degrees of latitude of your location
Angle To the North Star
• Spherical Earth:
The angle to Polaris
changes depending
on your location on a
spherical Earth
BACK
Latitude and Longitude
►The
earth is divided into lots of lines
called latitude and longitude.
Lines
►Longitude
lines run north and south
and measure west to east.
►Latitude lines run east and west and
measure north to south.
►The lines measure distances in
degrees.
Longitude
Latitude
Where is 0 degree?
►The
equator is 0 degree latitude.
►It is an imaginary belt that runs
halfway point between the North Pole
and the South Pole.
Equator
P
M
E
R
R
I I
D
► The prime meridianMis 0
I degrees
longitude. This imaginary
E A line runs
the Greenwich England N
Where is 0 degree?
, France, Spain, western Africa, and
Antarctica.
through
East West, North South on the
Earth ►Let each of the
N
W
E
S
four quarters
then be
designated by
North or South
and East or
West.
East West, North South on the
Earth
► The
(N, W)
(S, W)
(N, E)
(S, E)
N tells us we’re
north of the Equator.
The S tells us we’re
south of the Equator.
► The E tells us that
we’re east of the
Prime Meridian. The
W tells us that we’re
west of the Prime
Meridian.
East West, North South on the
Earth
(N, W)
Prime Meridian
►That
means all
points in North
America will have
a North latitude and
a West longitude
because it is North
of the Equator and
West of the Prime
Meridian.
What is Latitude?
90°N
►For
Y
X
90°S
Example:
►40°, 02’,51’’N
►This is close
to the latitude
where you
live.
What is Longitude?
►The
Y
X
180°W
180°E
earth is
divided into 360
equal slices
(meridians)
►180 west and
180 east of the
prime meridian
See If You Can Tell In Which
Quarter These Lon/Lats Are
Located
A
B
C
D
►1.
►2.
►3.
►4.
►5.
►6.
41°N, 21°E
37°N, 76°W
72°S, 141°W
7°S, 23°W
15°N, 29°E
34°S, 151°E
►1.
►2.
B
A
►3. C
►4. C
►5. B
►6. D
90°N
What is Latitude?
►Each degree
of latitude is
Y
divided into
60 minutes.
X
►Each minute
is divided into
90°S
60 seconds.
This is also true of longitude.
What is Latitude?
90°N
►Our
Y
X
90°S
latitude
and longitude
might be:
►40°, 03’,13’’N
►76°, 29’,
45’’W
Latitude and Longitude
45° N
44° N
43° N
42° N
41° N
Latitude
79° W
78° W
77° W 76° W 75° W
Longitude
74° W
73° W
45° N
79° W
78° W
77° W 76° W 75° W
44° N
43° N
42° N
41° N
Find:
1. 43° N, 76 ° W
2. 44 ° N, 76 ° W
3. 42 ° N, 79 ° W
74° W
73° W
Latitude and Longitude Resources
►Latitude
& Longitude Activity
►A Printable Latitude & Longitude
Map of the World
►Latitude & Longitude Map Making
►Latitude and Longitude Quiz
Time Zones
► The
Earth is divided into 24 time zones,
corresponding to 24 hours in a day.
► As the earth rotates, the sun shines in
different areas, moving from east to west
during the course of a day.
► Places that have the same longitude will be
in the same time zone.
► 15
degrees =1 hour
Time Zones
Directions: Use the coordinates of each location to determine the time at a
different location.
Part A: Use the longitude data to fill in the chart below. Times of location 1 are
all 3pm. First row is done for you.
Location 1
Location 2
Difference in
Longitude
Time
Difference in
Hours
+1
Time at
Location 1
Time at
Location 2
30°W
15°W
15° east
3 pm
4pm
30°W
45°W
3 pm
60°W
60°E
3 pm
135°E
15°W
3pm
0°
75°E
3 pm
Time Zones
Directions: Use the coordinates of each location to determine the time at a
different location.
Part A: Use the longitude data to fill in the chart below. Times of location 1 are
all 3pm. First row is done for you.
Location 1
Location 2
Difference in
Longitude
Time at
Location 1
Time at
Location 2
15° east
Time
Difference in
Hours
+1
30°W
15°W
3 pm
4pm
30°W
45°W
15° west
-1
3 pm
2 pm
60°W
60°E
120° east
+8
3 pm
11pm
135°E
15°W
150° west
-10
3pm
5am
0°
75°E
75° east
+5
3 pm
8pm
Part B: In the chart below the times for two locations are given as well as all
longitudes for location 1 only. Use your knowledge of earth science to fill in the
rest of the chart.
Location 1
Location 2
Difference in
Longitude
Time Difference
in Hours
Time at
Location 1
Time at
Location 2
30°W
3 pm
7pm
30°W
3 pm
12pm
60°W
3 pm
10am
135°E
3pm
9pm
0°
3 pm
4am
Part B: In the chart below the times for two locations are given as well as all
longitudes for location 1 only. Use your knowledge of earth science to fill in the
rest of the chart.
Location 1
Location 2
Difference in
Longitude
Time Difference
in Hours
Time at
Location 1
Time at
Location 2
30°W
30°E
60° E
+4
3 pm
7pm
30°W
75° W
45°W
-3
3 pm
12pm
60°W
135°W
75°W
-5
3 pm
10am
135°E
135°W
90°E
+6
3pm
9pm
0°
165°W
165° W
-11
3 pm
4am
Part C: Latitude and Longitude are both given now. Time at location 1 is 3pm. Figure
out the time difference and the time at location 2.
Location 1
Location 2
Time Difference in
Hours
Time at Location
1
45°N 30°W
30°N 60°W
3 pm
30°N 150°E
75°S 150°E
3pm
15°S 60°W
15°N 60°E
3 pm
60°N 135°E
60°N 120°E
3pm
50°N 105°W
65°N 75°W
3 pm
Time at Location
2
Part C: Latitude and Longitude are both given now. Time at location 1 is 3pm. Figure
out the time difference and the time at location 2.
Location 1
Location 2
Time Difference in
Hours
Time at Location
1
Time at Location
2
45°N 30°W
30°N 60°W
-2
3 pm
1pm
30°N 150°E
75°S 150°E
0
3pm
3pm
15°S 60°W
15°N 60°E
+8
3 pm
11pm
60°N 135°E
60°N 120°E
-1
3pm
2pm
50°N 105°W
65°N 75°W
+2
3 pm
5pm