... on their leeward sides. The tilting of the earth, with accompanying migration of the thermal equator, causes seasonal changes of wind direction responsible for the seasonality of precipitation patterns in the tropics; precipitation is also affected by the seasons in temperate latitudes. SOILS. Parent rock erodes physically and chemically into smaller and smaller particles, which become soils as they collect on both ... , then undertake very rapid growth. Most of the light-receiving leaves in understory species are arranged in a single layer to avoid self-cast shade (monolayering). Epiphy...

• Word Count: 12375
• Approx Pages: 50
• Has Bibliography
• Grade Level: Undergraduate

... Mongoloids. Modern physical anthropology has confirmed Humboldt's analogies. Most of the traits they have in common are also found among the mongoloid people all the way from Siberia to Indonesia. Their cheekbones are almost invariably wide, giving the eyes a somewhat elongated look. Perhaps the most striking ... long formed a part of their diet, and were raising half a dozen crops. Among them were the three that would ultimately become staples among all farming people in both central and North America - beans, squash and corn. Thus, it is not surprising that agriculture, spreading nort...

• Word Count: 3974
• Approx Pages: 16
• Grade Level: Undergraduate