What is the primary reason for the difference between a compass needle direction and map lines?

Magnetic Bearings and Declination Concepts

Interactive Video
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Geography
•
6th - 7th Grade
•
Hard

Patricia Brown
FREE Resource
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10 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The Earth's rotation
Magnetic declination
The position of the sun
The shape of the Earth
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How often does magnetic declination change?
It remains constant
It changes continually
It changes daily
It changes every decade
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What information might be printed on a map regarding declination?
Both B and C
The current declination
An estimate of declination change per year
The declination at the time of printing
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the first step in determining the exact declination using a compass?
Check the map's printing date
Estimate the declination
Calculate the grid bearing
Identify a ground feature on the map
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is a magnetic bearing?
A bearing calculated from the Earth's rotation
A bearing taken using the magnetic needle of a compass
A bearing taken using the map's grid lines
A bearing estimated from the sun's position
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
If the grid bearing is greater than the magnetic bearing, what is the declination?
East
West
South
North
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In the example given, what is the local declination if the magnetic bearing is 123 and the grid bearing is 143?
20° West
10° East
20° East
10° West
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