Metal detectors that locate metal beneath sand on a beach are activated by

A. electric fields.
B. magnetic fields.
C. alternating current.
D. electromagnetic induction.


Answer: D

Environmental & Atmospheric Sciences

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An annual population growth rate of +1% corresponds to a situation where there are 100 more deaths

per thousand individuals than live births in a given year.c Indicate whether the statement is true or false.

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What type of structure is shown in the photograph?

A) reverse fault B) normal fault C) anticline D) syncline

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What are the overall percentages of the labor force that are engaged in agriculture in developed countries and developing countries, respectively?

A) 10%; 80% B) 5%; 60% C) 2%; 90% D) 15%; 50% E) 9%; 89%

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Which of the following is not considered biota?

A) bacteria B) water C) fungi D) animals E) plants

Environmental & Atmospheric Sciences