The Allende Meteorite Contained an Abundance of ²⁶Mg,an Isotope of Magnesium.What

question 36

Multiple Choice

The Allende meteorite contained an abundance of ²⁶Mg,an isotope of magnesium.What is the significance?

• A) Magnesium has a high melting point, so the asteroid of which Allende was originally a part must have formed in the inner part of the solar system.
• B) ²⁶Mg is radioactive, and the sample was probably produced in a nearby supernova explosion about the time the solar system was formed.
• C) ²⁶Mg is the stable product of the decay of radioactive ²⁶Al. The ²⁶Al from which the ²⁶Mg formed was probably produced in a nearby supernova explosion about the time the solar system was formed.
• D) This discovery suggests that heavy elements such as magnesium were more abundant in the early Kuiper belt than we had originally thought.

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Definitions:

Sociolinguistic Competence

Knowledge of the implicit rules for generating socially appropriate sentences that make sense because they fit the listeners’ social knowledge.

Speech Act Theory

The theory that verbal utterances both state something and do something.

Intentionalist Model

A theory that views communication as the exchange of communicative intentions and views messages transmitted as merely the means to this end.

Encoder-Decoder

A model in communications and information processing that describes the process of transferring information from a sender (encoder) to a receiver (decoder).