In the Self-Propagating Star Formation Theory

question 54

Multiple Choice

In the self-propagating star formation theory,

• A) spiral arms are formed and sustained primarily by the actions of solar mass stars because there are so many more solar mass stars than high-mass stars.
• B) spiral arms are poorly defined because they are formed and sustained primarily by the actions of short-lived massive stars.
• C) the passage of dust clouds through the spiral arms triggers star formation.
• D) spiral structure results with thin,well-defined arms.

---

Definitions:

Investment Spending

Expenditures on new physical assets like buildings, machinery, and equipment, contributing to future production capacity.

GDP

Gross Domestic Product, a monetary measure of the market value of all final goods and services produced in a specific time period.

MPC

Marginal Propensity to Consume, the proportion of additional income that a consumer spends on purchasing goods and services, rather than saving.

GDP

Gross Domestic Product, the total value of all goods and services produced within a country's borders in a specific time period, indicating the size of its economy.