The answers are as follow:
7. A.
The Africa continent is richly bless with all kind of mineral resources in high quantities. Different minerals can be found in various African countries in varied quantities. Out of all these mineral resources, the ones which African has in rich quantities include diamond, gold and oil. The African continent provides 46% of the world diamond and 21% of the world gold. The continent is also rich in oil.
8. B
Government revenue refers to those money which the government generate; government uses this money to cater for the public and their needs. The amount of revenue to be spent on different categories of needs are usually determine at the beginning of every fiscal year. African governments typically devote a small percentage of their revenue to interest payment.
9. B
Despite the rich mineral resources which are found on the African continent, the continent is a very poor one due majorly to corruption and lack of efficient management of resources. The countries in the south of Africa seems to be better off financially that those in the sub Saharan part of Africa.
They have evolved to endure more as well as having been exposed to it from birth.
Answer:
Positive feedback
Explanation:
Positive feedback climate is usually defined as the process where there occur changes in the region where the lighter colored surfaces such as the region of glaciers, ice caps are replaced by the dark-colored surfaces, and this results in the decreasing of the albedo (light-reflecting property) and also increase in earth's surface temperature. This type of feedback is also known as the ice-albedo feedback.
High rate of heating results in the decreasing amount of glaciers and ice-caps, thereby leading to the global warming effect.
Thus, the above-given condition is an example of positive feedback.
Answer:
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