One Major Contribution of Ptolemy to the Development of Astronomy

question 24

Multiple Choice

One major contribution of Ptolemy to the development of astronomy was to

• A) develop and expand on a mathematical model for the solar system,in which planets move in epicycles around centers that move in circles around Earth.
• B) derive a mathematical model for the solar system,in which planets move around the Sun in circular orbits.
• C) originate the idea of a geocentric (Earth-centered)cosmology in which planets move in circles around Earth,which was later developed mathematically by Aristarchus.
• D) derive a mathematical model for the solar system,in which planets move around Earth in elliptical orbits,moving fastest when closest to Earth.

Understand the role and instruments of central banks in regulating the economy.

Relate economic policies to the economic growth and stability of a country.

Evaluate the relevance and limitations of economic indicators in measuring prosperity.

Explain the role of purchasing power parity in comparing economies.

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Definitions:

Acid-Base Reaction

A chemical reaction that involves the transfer of a proton (H+) from an acid to a base, resulting in the formation of a conjugate base and a conjugate acid.

Equilibrium

The state in which the concentrations of reactants and products in a reversible chemical reaction are unchanged over time, indicating a balance in the rate of forward and reverse reactions.

Synthetic Route

The planned sequence of chemical reactions used to convert starting materials into desired products in the laboratory or industry.

Reagents

Chemical substances that are employed to bring about a chemical reaction in a provided set of reactants.