____________________ is an important constituent of soil and provides nutrients to plants and increases the ability of the soil to retain ____________________
Fill in the blank(s) with correct word
Humus, moisture
Environmental & Atmospheric Sciences
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Distribution of temperature during the year:
Environmental & Atmospheric Sciences
In developing nations, such as India and Nigeria, ________
A) small numbers of people have moved into the cities B) rural people are moving to the cities in large numbers C) very little change has occurred in the past 40 years regarding where people live D) most of the population is moving to the suburbs from the city centers E) more people are moving to the suburbs than to the city centers
Environmental & Atmospheric Sciences
The common staple food of Southern Africa is
A. rice B. wheat D. yams
Environmental & Atmospheric Sciences
Which arrows in this figure indicates ultraviolet energy, an external energy source? 
A. A B. B C. C D. D
Environmental & Atmospheric Sciences