Practical Exercises in Physical Geography

Cover Practical Exercises in Physical Geography

Purchase of this book includes free trial access to www.million-books.com where you can read more than a million books for free. This is an OCR edition with typos. Excerpt from book: EXERCISE II. A COASTAL PLAIN Object. To represent part of a coastal plain on a map, and to describe the form thus represented. Preliminary. The numbers on 31 show the altitude or height above sea level, in feet, of many points (dots near the numbers) in a district bordering the sea. The numbers preceded by a negativ

...

e sign (as ?15) indicate a negative altitude ; that is, a depth below sea level. This exercise uses 3 1, 3 2 (and 4 8) ; [also 6 15 and 35 1]. 1. 1. Draw a light (pencil) line in 3 1 separating all parts of the surface that are higher than 100' from all parts that are lower than 100'. This line must pass through all points marked 100 ; midway between points equally above and below 100, such as 105 and 95; nearer to 95 than to 110; nearer to 105 than to 90. 2. Explain the preceding rules. 3. Draw similar lines separating parts higher and lower than 200'; than 300'; than 0'. Mark the last line heavier than the others. What does this line represent ? 4. Do the same for 400', 500', 600'. [Intermediate lines for 50', 150', 250', etc., may also be drawn.] 2. 1. Would you ascend or descend (go uphill or downhill, up- slope or down-slope) in walking from K to A ? from G to H ? from H to F? from C to E ? along the 100' line ? along any of the lines that you have drawn ? 2. Do the (pencil) lines follow slanting or level paths ? Lines of this kind are called contour lines, or contours. 3. What is the (estimated) difference of altitude between H and G ? between B and A ? between two adjoining contour lines ? 4. The last difference is called the contour interval. Why ? 3. 1. Lay a strip of paper on 31 along the line AB ; mark short lines on the edge of the strip opposite A and B and print these letters there; mark dots on the strip edge at the contours of 0', 100',200...

MoreLess

Read book Practical Exercises in Physical Geography for free

You can download books for free in various formats, such as epub, pdf, azw, mobi, txt and others on book networks site. Additionally, the entire text is available for online reading through our e-reader. Our site is not responsible for the performance of third-party products (sites).
Ads Skip 5 sec Skip
+Write review

User Reviews:

Write Review:

Guest

Guest