Social mobility refers to movement between social classes or statuses. It can occur when one changes occupations but maintains the same social standing, such as a doctor becoming a medical professor. Poverty exists when income is too low to meet basic needs and can be absolute, relative, situational, or generational. Social inequality involves unequal opportunities and outcomes based on social positions or statuses in areas like income, wealth, education, and health. It can be measured through inequality of conditions, like unequal distribution of wealth and housing, or inequality of opportunities, such as unequal access to education or treatment in the justice system.