Which Substance Is of Great Concern to Scientists Studying Human-Generated

question 3

Multiple Choice

Which substance is of great concern to scientists studying human-generated greenhouse gases, and is thought to increase such that the earth's climate will be irrevocably changed by 2020?

• A)chlorofluorocarbons
• B)carbon dioxide
• C)methane
• D)nitrous oxide
• E)ozone

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Definitions:

Amygdala

A region of the brain involved in emotional processing, particularly fear and pleasure responses.

Hippocampus

A major component of the brain involved in learning and memory, especially the consolidation of short-term to long-term memory.

Fornix

A C-shaped bundle of nerve fibers in the brain that acts as a major pathway for transmitting signals related to memory between the hippocampus and other brain regions.

Hypothalamus

A compact area within the brain that is vital for numerous essential activities, such as hormone secretion and body temperature control.