Answer:
d. the Sahara desert forms a cultural barrier in Africa
Explanation:
The vast Sahara certainly plays the role of a cultural barrier, blocking the North-South exchanges on that huge continent.
a. apartheid is the official policy of Africa
: today? False, that ended in 1994.
b. Europe controls most of African nations today. No, at least not politically. China is a bigger player in Africa now than most European countries with massive investments. Most European colonies got their independence 50-60 years ago.
c. Africa is governed by the IMF IMF is an economic institution, it doesn't control or rule any country.
Answer:
A
Explanation:
A thunderstorm only occurs in cumulonimbus cloud.
A change in the wind direction and high speed winds at high altitudes makes the air to swirl around horizontally
.
The air which rises from the ground tries to push up the air which is swirling around and tips it over.
The funnel of the air starts sucking up more warm air from the ground.
The funnel grows longer and longer and stretches to reach the ground and
when the funnel reaches the surface it becomes a tornado.
Explanation:
1. Using oil dispersants has the following benefit -
- Helps in dispersing the oil over a large surface rather than being spilled onto a smaller area, hence effectively reducing the oil concentration from any particular surface.
2. Negative consequences of using a dispersant is -
- The negative consequences of using a dispersant is that, while dispersion of oil, dispersants tends to adversely effect the organisms and planktons of a larger area.
the innermost part of the earth is called the core.
