1. Key Prompt: Page 15 of ISN
Think about a time you went to a new place and had to find your way around. Write about the tools you or your parents used to find your way around this new place.

2. Take Notes: ISN Page 15

3. Objectives: Student will be able to…
describe ways geographers use latitude and longitude to study Earth.
identify the basic questions geographers seek to answer in their study of Earth.

4. How do geographers study Earth?

5. Locate points on Earth’s surface
Take measurements
Locate points on Earth’s surface
What tools do they use to take these measurements? How do they do it? Latitude, Longitude, Cardinal Direction

6. Locate Point Using a Global Grid:
Set of lines used to identify locations on maps. A B C D E F 1 2 3 4 5 6
Grid systems are used to find exact locations. They are made of two lines that xross eachother.
The global grid system we use to locate position on Earth is called longitude and latitude

7. The Compass Rose: Gives us orientation
Cardinal Directions: North, East, South and West
Intermediate Directions: lie between cardinal directions.
NW, NE, SW, SE
For instance NW is half way between north and west. How are cardinal directions and intermediate directions the same. They are all direction. How are they different? Intermediate directions are based on cardinal directions.
Where have you seen cardinal directions or the cardinal rose before? When have you used it?

8. Latitude and Longitude
Refer to imaginary lines around Earth that help locate specific points and places on its surface.

9. Latitude (aka parallels)
Distance north or south of the equator and form east-west circles around the globe.
Each degree of latitude is about 69 miles apart.
Lines are parallel so they never cross.
What is the most important line of latitude? Equator or zero degree line of latitude

10. EQUATOR Equator: aka the “zero degree” latitude line
Half way between the North and South Poles.
Widest circumference on the globe.
The most important line of latitude.
Each line on the globe is labeled for its distance north or south of the Equator.
Refer to the globes or papers with globe passed out to the class.

11. Longitude (aka meridians)
Distance east or west of the Prime Meridian and form north-south lines that run between the North Pole and South Pole.
Widest apart at the equator.
The north and south lines do meet at both poles.

12. Passes through Greenwich, England
Prime Meridian
Passes through Greenwich, England
Measures longitude, the distance east or west of the Prime Meridian
Earth’s time zones are measured from the prime meridian
The time at 00 is called Universal Time (UT) or Greenwich Mean Time (GMT).
International agreement that the prime meridian would fall on Greenwich England runs right through an observatory.

13. Each 150 East or West marks a new time zone.
There are 24 total time zones.

14. How is Latitude and Longitude Measured?
Measured in “degrees” (unit that measures angles)
AND
“Minutes” measure smaller degrees.
Ex: 38054’N
38 degrees, 54 minutes, North Latitude
This is the absolute location of the Capitol Building in Washington DC

15. Latitude Lines: Measured 0-900 North or 0-900 South of the equator.
Longitude Lines: Measured 1800 East or West of the prime meridian.

16. Each half of Earth is called a hemisphere.
Earth’s Hemisphere’s
Each half of Earth is called a hemisphere.
N. Hemisphere: Above the Equator
S. Hemisphere: Below the Equator
E. Hemisphere: East of the Prime Meridian
W. Hemisphere: West of the Prime Meridian
We know the equator divides Earth in half

17. Which hemisphere would you find longitude lines east of the Prime Meridian? Eastern Hemisphere

18. Which two hemispheres do we live on here in Boise?
North west hemisphere