The eccentricity portion of Milankovitch's astronomical theory refers to:
A) variations in the energy emitted by the Sun.
B) the unpredictability of Earth's weather.
C) changes in the shape of Earth's orbit.
D) changes in the rate of Earth's rotation.
E) changes in the tilt of Earth's axis.
C
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Recycling, reuse, and composting create many new ____.
A. problems B. expenses C. pollutants D. jobs E. landfills
Cleavage is ____
A)the breaking of minerals along smooth planes of weakness determined by the strength of their chemical bonds B)not useful for mineral identification C)determined by how many different elements are combined in the formation of a particular mineral D)the breaking of minerals along planes of fracture resulting from strong hydrogen bonds E)mineral breakage along irregular surfaces
Radioactive wastes consist of
A) high-level direct products of fission. B) low-level indirect products of fission. C) high-level direct products of fission and low-level indirect products of fission. D) the direct and indirect products of fusion.
In a conditionally unstable atmosphere: a. both saturated and unsaturated air parcels are unstable
b. saturated air parcels are stable and unsaturated parcels are unstable. c. saturated air parcels are unstable and unsaturated parcels are stable. d. None of these choices.