Railroad Carloadings Have Declined Since 1900

question 14

Multiple Choice

Railroad carloadings have declined since 1900.What is the primary reason for the decline?

• A) competition by foreign transportation
• B) fuel efficient smaller cars
• C) reduction in line trackage
• D) larger cars and increasing car productivity

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Definitions:

Lewis Dot Structure

A diagram that represents the valence electrons of atoms within a molecule, showing the bonding between atoms as well as lone pairs of electrons.

He

Helium, a colorless, odorless, tasteless, non-toxic, inert, monatomic gas that heads the noble gas series in the periodic table.

Lewis Dot Structure

A graphical representation of the valence electrons of atoms, indicating how the electrons are shared or paired between atoms in a molecule.

Ca

Calcium, a chemical element with the symbol Ca and atomic number 20, an alkaline earth metal essential for living organisms, particularly in cell physiology.