Answer:
Secondary sources : The data which are found from individual person, organizations, agencies, books, journals, magazines, annual reports, etc. are secondary sources of population data.
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:
Option (1)
Explanation:
The Umbra refers to the dark portion of the shadow zone where there reaches no light from the source (Sun) because of its opaque property. These shadows are formed during the time of occurrence of an eclipse.
During the time of an annular eclipse, the moon is at the farthest distance from the earth, due to which the moon appears to be much smaller in size and cannot fully cover the Sun. So, this condition gives rise to the formation of a ring-like structure, and light is transferred from the sun through the periphery of the moon. There occurs both the annular solar eclipse and annular lunar eclipse.
Thus, the correct answer is option (1).
A type of nuclear disaster is a nuclear meltdown, which happens when a core of the nuclear reactor has a damage from overheating. Other causes include: radiation contamination and fire.
