The All-Time High Rate of Births in the United States

question 15

Multiple Choice

The all-time high rate of births in the United States was 27 per 1000 people.When was the U.S.birthrate this high?

• A)during the colonial period
• B)during the late nineteenth century
• C)just following World War II
• D)just following the Vietnam War

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Definitions:

Oxygen

A chemical element with the symbol O and atomic number 8; it is a highly reactive nonmetal and an oxidizing agent that readily forms oxides with most elements as well as with other compounds.

Electron Orbitals

Regions in an atom where there is a high probability of finding electrons, with each orbital having a distinctive shape and energy level.

Covalent Compound

A chemical compound formed by the sharing of pairs of electrons between atoms.

Dichlorodifluoromethane

A chemical compound once widely used as a refrigerant and propellant but now recognized for its ozone-depleting properties.