Which U.S. state is made up of volcanic islands, including Mauna Loa?

• A. Hawaii
• B. Alaska
• C. California
• D. Florida

Answer: (A)

Understanding which U.S. state is made up of volcanic islands helps connect geology with geography. Hawaii is composed of numerous volcanic islands formed by a hotspot in the Pacific Ocean, and Mauna Loa sits on the Big Island as one of its most famous volcanoes. That combination—an entire state built from volcanic islands with active volcanoes like Mauna Loa—fits Hawaii exactly. The other states listed aren’t archipelagos of volcanic islands: Alaska has many features and volcanoes but not a group of volcanic islands that define the state; California is mostly a mainland region with some volcanoes, not an island chain; Florida is a flat coastal peninsula with no volcanic islands.