How is the SAT different from the ACT?

The SAT and ACT are both standardized college admissions tests, but they differ in terms of content, format, and scoring. The SAT focuses more on evidence-based reading and writing, while the ACT covers English, math, reading, and science reasoning. The SAT has a stronger emphasis on vocabulary and includes an optional essay, while the ACT has a science section and does not penalize for guessing.