The current world population is estimated at about 9 billion
Indicate whether the statement is true or false.
Answer: FALSE
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Which of the following gases are mainly responsible for the atmospheric greenhouse effect in the Earth's atmosphere?
A. water vapour and carbon dioxide B. ozone and oxygen C. nitrogen and carbon dioxide D. oxygen and nitrogen
Which of the following best matches the description?Method of tilling and planting at right angles to the slope.
A. windbreak B. soil texture C. humus D. horizon E. lithosphere F. loam G. asthenosphere H. parent material I. chemical weathering J. soil structure K. friable L. weathering M. leaching N. terrace O. mechanical weathering P. soil profile Q. contour farming
Most scientists believe that volcanism has played a major role in the depletion of the ozone layer in Earth's stratosphere
Indicate whether the statement is true or false
The Greek mathematician and geographer Eratosthenes is noted for
A) his highly precise maps of the coastlines of Mediterranean Europe and Africa. B) calculating Earth's diameter by measuring celestial angles at two different locations. C) inventing the concepts of time zones by dividing 360 by 24, thereby establishing 15° zones. D) being the first to realize the spherical shape of Earth E) reasoning that Earth's equatorial bulge was the result of Earth's rotation and centrifugal force.