Home » Curriculum » Humanities » HUM-112 World Geography » World Geography, Lesson 11. On the Forms and Motions of the Earth, Pt 4

# World Geography, Lesson 11. On the Forms and Motions of the Earth, Pt 4

To complete this lesson, complete the following tasks:

1. Study the lesson for mastery.
2. Memorize all answers in bold.
3. Earn a perfect score on the lesson Exam.

## Lesson

##### Read each question and study to memorize the answer.  When all have been memorized, work to master the lesson exam.

120. What are the Polar Circles ?
The Polar Circles are two small circles running east and west.

121. Where are they placed ?
The Polar Circles are placed at the distance of 23 1/2 degrees from each Pole.

122. What are their names ?
The Arctic Circle is the northern polar circle, and the Antarctic Circle is the southern polar circle.

123. What are the Parallels ?
The Parallels are circles extending east and west.

124. How are they represented on the Maps ?
The Parallels are represented on the Maps by lines crossing from side to side.

125. What are the Meridians ?
The Meridians are circles extending from Pole to Pole through the Equator.

126. How are they represented on the Maps ?
The Meridians are represented on the Maps by lines extending from the top to the bottom.

127. How are geographical circles divided ?
A. Every circle is supposed to be divided into 360 degrees and every degree into 60 geographical miles or minutes.

128. What is the length of a degree of a great circle ?
A. The length of a degree of a great circle is sixty-nine and a quarter common miles.

129. How will you find the number of miles in any given number of degrees ?
A. You will find the number of miles in any given number of degrees by multiplying the degrees by 69 1/4.