What is the principle of superposition?
Ans: Within a sequence of rock layers formed at Earth's surface, rock layers lower in the sequence are older.
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Virtual water is water
a. that exists only in deep underground aquifers b. that we hope to be able to draw on in coming years c. that is not directly consumed but is used to provide us with food and other consumer products d. that comes as precipitation in desert areas e. that is predicted to be in runoff from snowfields at high altitudes
Which of the following forecast methods compares past weather maps and weather patterns to those of the present?
A. nowcasting B. persistence forecast C. analogue method D. trend method
World heritage refers to
A) sites perceived to have outstanding universal value for all of humanity. B) the social ties, networks, institutions, and trust that members of a group use to achieve mutual benefits. C) the view that the diffusion of Western science, technology, and practices to other peoples would enable them to advance socially and economically. D) awareness of cosmic forces influencing human use of the environment. E) the idea that global and local forces interact and that both are changed in the process.
Which of the following is a mineral?
A. volcanic glass B. material with crystals of different chemical compounds C. crystals grown in a laboratory D. ice E. None of these choices are correct.