Which Characteristic of Earth Explains Why We Have an Ultraviolet-Absorbing

question 2

Multiple Choice

Which characteristic of Earth explains why we have an ultraviolet-absorbing stratosphere?

• A)the existence of photosynthetic life
• B)the existence of plate tectonics
• C)the moderate surface temperature
• D)the existence of oceans

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Definitions:

Cyclopentane

A cyclic hydrocarbon with the chemical formula C5H10, having a ring of five carbon atoms, used as a solvent and in the synthesis of rubber.

Monobrominated Product

A compound resulting from the introduction of a single bromine atom into an organic molecule, often used in chemical synthesis.

Methylcyclohexane

A saturated hydrocarbon with the formula C7H14, consisting of a cyclohexane ring substituted with a methyl group.

Monochlorinated Products

Chemical compounds that contain a single chlorine atom covalently bonded within their structure.