Answer: In some parts of the world, windblown dust and silt blanket the land. This layer of fine, mineral-rich material is called loess. Loess is mostly created by wind, but can also be formed by glaciers. When glaciers grind rocks to a fine powder, loess can form.
Answer:
C.
crust, mantle, outer core, inner core
Explanation:
-South Africa richest country in minerals
-Oil: Nigeria, Angola, Equatorial Guinea, Gabon
-Diamonds: Botswana, DR of Congo, Republic of South Africa, Namibia
-Uranium: Namibia, Niger, Malawi, Republic of South Africa
-Strategic minerals: Republic of South Africa, DR of Congo, Rwanda
-Copper: Zambia, DR of Congo, Republic of South Africa
Answer:
The invasive s p e c i e s tend to diminish the populations of native s p e c i e s because they outcompete them, and also manage to disturb the ecosystem.
Explanation:
The invasive species can or cannot be dangerous for the native biodiversity, but unfortunately, it is the second one that is much more common. The reasons as to why the invasive species tend to threaten the biodiversity are that they often don't have a native predator that will control their numbers, outcompete the native species for resources, and the native species don't have defense mechanisms against them. These factors result in havoc in the ecosystem in a relatively short period, with the potential to totally destroy it and changed it.
There are thousands of examples of invasive species around the world, some much more obvious than others. The Burmese pythons in Florida for example, have started to overtake the a p e x predator niche from the alligators by directly attacking them. On the other side of the world, in Australia, the cats and rabbits have contributed to leading hundreds of native species on the verge of extinction, and if there hasn't been human intervention there is a very high chance that a lot of native species would have been already extinct.
