Practical Exercises in Physical Geography
Format: Paperback
ISBN13: 9780217320504
Paperback|9780217320504
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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 negative 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...
| ISBN-13 | 9780217320504 |
|---|---|
| ISBN-10 | 0217320503 |
| Weight | 0.45 Pounds |
| Dimensions | 9.00 x 6.00 x 0.30 In |
| List Price | $19.99 |
| Format | Paperback |
|---|---|
| Pages | 130 pages |
| Publisher | |
| Published On | 2009-08-01 |
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