Final answer:
Crystallized intelligence refers to skills that depend on accumulated knowledge and experience, while fluid intelligence encompasses problem-solving abilities. These two types of intelligence were proposed by Raymond Cattell.
Step-by-step explanation:
Crystallized intelligence refers to skills that depend on accumulated knowledge and experience, good judgment, and mastery of social conventions. It is characterized as acquired knowledge and the ability to retrieve it. On the other hand, fluid intelligence encompasses the ability to see complex relationships and solve problems. While crystallized intelligence helps overcome concrete problems, fluid intelligence helps tackle abstract challenges. These two types of intelligence were proposed by Raymond Cattell in the 1940s.