The time necessary for one-half of the original number of radioactive atoms of an element to decay to a stable

daughter product is known as a(n) ____.
a. scale
b. metamorphosis
c. half-life
d. alpha decay
e. relative age


c

Environmental & Atmospheric Sciences

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The principle of relative age dating which can be used to determine when the river formed on the landscape is the principle of

A. cross-cutting relations. B. original horizontality. C. inclusions. D. superposition.

Environmental & Atmospheric Sciences

Which of the following layers in the earth has the highest density?

A) Asthenosphere B) Lithosphere C) Lower mantle D) Outer Core

Environmental & Atmospheric Sciences

An object that has kinetic energy must be

A) moving. B) falling. C) at an elevated position. D) at rest. E) none of the above

Environmental & Atmospheric Sciences

What is one role of unpaired valance electrons?

A) They take part in the formation of different types of bonds. B) They keep the paired electrons separated to minimize interaction. C) They are the nonbonding electrons. D) They provide the number of Lewis dots. E) They tell us which Lewis dot structure is correct.

Environmental & Atmospheric Sciences