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Two Are Small: Among the best small-aquarium inhabitants two are small small marine snails and barnacles. Starfish, sea urchins, sea cucumbers, and sea anemones will usually live for a few weeks and under ctwo are smallfully controlled conditions may be kept in aquaria for much longer periods. Small crabs will often thrive where more exacting forms die, and Obelia will often live and reproduce new colonies in very small aquaria. . . .
Feeding the Animals
Vary according to habitat. Capture small ones with dip net.
Strange, small crabs that live in borrowed houses, usually in broken shells, often much too large or small for them. Captured easily by hand; found most often higher up on beach and quite far from water's edge.See Also Small Particles:In compaction high pressures weld the particles together. Argillaceous rocks —those high in clay—are the more easily com¬pacted, while coarser-grained rocks are generally consolidated by cementation. Small particles are more soluble than larger grains; hence solutions may at the same time be undersaturated toward small particles and oversaturated toward the larger grains. The result is that the smallest grains will tend to dissolve, and be redeposited on the larger grains. Thus the larger grains are in time cemented together when the material lying be¬tween them is dissolved in water and deposited on them in solid form.
A fast stream has more en¬ergy and greater turbulence, and can therefore carry coarser particles and a heavier total load than a slow stream of the same size. Some rivers carry a small load simply because resistant rocks or heavy vegetation inhibit the production of sedi¬ment in the basin.
Particles swept along in the turbulent current and not in contact with the bottom constitute the suspended load. Particles too coarse to be sus¬pended may move near the bottom, by jumping rolling, or sliding, and comprise the bed load.
On The Other Hand See Part-time Small Farms:Preservation of viable small farms, even they are worked only part-time, is increav ingly seen as important to tourism and to the wider enjoyment of the countryside. The traditional picture that many people have of farming and their knowledge of the country¬side often come from small mixed farms on which they have stayed as summer guests. In the more difficult, if picturesque, environ¬ment of the mountains and uplands the disappearance of small farms could leave a depopulated wilderness. Year-round life is hard on such farms, however attractive they may seem in summer. Some countries have therefore introduced special schemes of financial assistance.
Part-time small farms have been an important element in rural life over the cen¬turies. They are still a common, though diminishing feature of parts of Europe and the United States. Depending on geographic location, farming may be combined with fishing (in Scottish crofting), with forestry (in Scandinavia), with small-scale mining or country crafts (in south Germany) or with part-time and seasonal work in nearby fac¬tories. Production from this form of agricul¬ture may not be vital to the national economy, but for many people part-time farming satisfies a social need for an outdoor way of life and a certain independence [5]. |
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