Studies Documenting the Arrival of Spring and Fall in the Northern

question 40

Multiple Choice

Studies documenting the arrival of spring and fall in the Northern Hemisphere are based on:

• A) average daily temperatures as measured at locations throughout Northern Hemisphere.
• B) fixed calendar dates that have been consistent for the past 150 years.
• C) when buds of particular plants open and when the leaves of particular plants change color and fall.
• D) average snow melt, precipitation, and consistently increasing or decreasing temperatures across the state.
• E) the amount of pollution, particularly greenhouse gases, found in the atmosphere of that region.

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Definitions:

Foliation

Foliation is the repetitive layering in metamorphic rocks, caused by the reorientation of minerals under high pressure and temperature conditions.

Cross Section

A diagram representing the geology as a two-dimensional slice through the land. See also geologic cross section.

Cleaved Rocks

Rocks that have been split or sliced along very smooth, flat surfaces, often due to intense pressure.

Unconformity

A boundary between underlying and overlying rock strata representing a significant break or gap in the geologic record; an unconformity represents an interval of nondeposition or erosion, commonly accompanied by uplift.