Answer:
According to one estimate, stands of century-old forest now account for only 7% of forest cover in the United States (USDA-FS 2000). Since 1600, 90% of the virgin forests that once covered much of the lower 48 states have been cleared away.
Explanation:
Mount Baker-Snoqualmie National Forest, Washington
The Mount Baker-Snoqualmie forest is located in the Cascade mountain range in Washington state and is home to 644,000 acres of old-growth. Situated around an hour away from the Seattle metropolitan area, this forest is one of the most frequently visited in the country.
Answer:
mechanical weathering
Explanation:
As a definition, mechanical weathering is the disintegration and decomposition of rocks on or on the earth's surface produced by different atmospheric, climatic and biological agents.
Weathering is a permanent process in nature.
It is also defined as a static process by which the rock breaks into small fragments, dissolving and decomposing to form new minerals. This is the way in which the removal and transport of detritus then results in erosion. It follows that weathering, by reducing the consistency of the stone masses leads to the erosion process.
The causative agents of the weathering of the stones, (external geological agents) can be physical (mechanical), chemical and biological.
Answer:
Two effects of the Silk Road are the sharing of technological advancements and the spread of the plague.
Explanation:
The Silk Road was a network of trading routes that connected East Asia, Southeast Asia, South Asia, Central Asia, the Middle East, Europe, and northwestern Africa. This trading network has been functional for several thousand years and it has had a lot of positive effects on humanity, but also the occasional negative one.
One big positive effect has been the sharing of technological advancements between the different civilizations, which has led to improvements in the living conditions, exploration, and further advancements all over the areas that are connected with this network. One big negative effect has been the plague. Through the extensive trade of goods, the plague managed to find its way from East Asia all the way to Europe, and it had such a negative effect on the population that it contributed to big geopolitical changes, and it was the last time when the human population dropped.
That's true of both <em>South America</em> and <em>Africa</em>.
