Answer:
At the equator, the sun is directly overhead at noon on these two equinoxes. The "nearly" equal hours of day and night is due to refraction of sunlight or a bending of the light's rays that causes the sun to appear above the horizon when the actual position of the sun is below the horizon.
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I only know that number 7) is equator <span />
<span>The Mesopotamians made sails to harness the wind to move boats, and eventually sailed and traded as far away as what is now India.
It allowed them to trade good with faraway lands</span>
Answer:
Glaciers act as reservoirs of water that persist through summer. Continual melt from glaciers contributes water to the ecosystem throughout dry months, creating perennial stream habitat and a water source for plants and animals. The cold runoff from glaciers also affects downstream water temperatures. Many aquatic species in mountainous environments require cold water temperatures to survive. Some aquatic insects--fundamental components of the food web--are especially sensitive to stream temperature and cannot survive without the cooling effects of glacial melt water. Such changes in stream habitat may also adversely impact native trout and other keystone salmon species.
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B the north European plain provides navigable rivers
