One Roentgen Is Defined as

question 29

Multiple Choice

One roentgen is defined as

• A) the amount of ionizing radiation that will produce 1/3 × 10−⁹ C of electric charge in 1 cm³ of air under standard conditions.
• B) the amount of radiation that deposits 10−² J of energy into 1 kg of absorbing material.
• C) the amount of radiation needed for ionization of an atom.
• D) the amount of radiation needed for dissociation of a molecule.
• E) the amount of radiation that deposits 1 erg of energy in 1 g of air.

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Definitions:

Rock Characteristics

The inherent properties and features of rock, including texture, mineral content, and permeability among others.

Angular Clasts

Angular clasts are pieces of rock that have sharp edges and points, indicating they have not been traveled far from their source because they have not been significantly worn down by erosion.

Breccia

A type of rock consisting of angular fragments of minerals or rocks cemented together by a finer-grained matrix, often formed by volcanic or tectonic actions.

Formation

A rock unit that is distinct, laterally traceable, and mappable; also used as an informal term for an eroded, perhaps unusually shaped, mass of rock.