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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1900 edition. Excerpt: ...sunlight cannot pass through so much water. In consequence, the Fig. no. fish living One of the deep-sea fish. there have Fig. 115. A part of the globe. What continents and oceans are shown? little use for eyes, and some that have been brought to the surface have none. The mud which covers the bottom is in many places made up of the shells of tiny animals, many of them even smaller than a pinhead. Some of the chalk used in schools was just such mud before it was raised to form rock layers on the dry land. Mountains in the Oceans.--While most of the bottom of the sea is a plain, some parts are not so level. Here and there are mountain peaks, and chains of islands, extending above the sea far away from the continents. Many of these are portions of mountain chains rising above the water, having been lifted to such a height by the wrinkling of the earth's crust through contraction; but many, like the Hawaiian Islands, are volcanoes which have been built up by lava flowing from the interior of the earth (see pp. 124 and 125). Coral Islands.--In the open ocean there is another interesting kind of island known as the coral island (Fig. 118). Some very tiny creatures, called coral polyps, build hard, limy coral, such as you have no doubt seen. Where the ocean water is warm, as in the torrid zone, these little animals live in immense numbers. Millions of them may be found around a single island, and every one is busy building its tiny skeleton of lime. Each polyp resembles a fully blossomed flower; and they vary greatly in color, being white, pink, purple, red, Fig. 117. A piece of coral, with the polyps projecting from the hard coral like a hunch of flowers. Review Questions.--(1) Name the five continents, counting Eurasia as one. (2) Write their names....
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Product details

  • Paperback | 68 pages
  • 189 x 246 x 4mm | 141g
  • Miami Fl, United States
  • English
  • black & white illustrations
  • 1236637143
  • 9781236637147