Which Statement Is True

question 151

Multiple Choice

Which statement is true?

• A) Radioisotope dating of rocks, combined with fossil analysis, is the most powerful method of determining geological age.
• B) Earth's magnetic field never changes.
• C) Scientists divide geological periods into eras.
• D) In order to date igneous rocks, geologists search for locations where sedimentary rocks have intruded into igneous rocks.
• E) Radioisotope dating can only be performed on fossils.

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Definitions:

Electrophilic Chlorination

A chemical reaction where a chlorine atom, acting as an electrophile, is added to another molecule, often involving aromatic compounds or alkanes.

Aromatic Compounds

Organic molecules that contain one or more benzene rings in their structure, characterized by their stable ring system and delocalized pi electrons.

H2O

The chemical formula for water, a compound consisting of two hydrogen atoms bonded to one oxygen atom.

Bromine Substituent

Refers to a bromine atom attached to the carbon skeleton of an organic molecule, affecting its reactivity and properties.