Given a scientific passage and an answer, generate a question for the given answer.

Passage: Intensity is defined to be the power per unit area carried by a wave. Power is the rate at which energy is transferred by the wave. In equation form, intensity I is. Answer: wave
Intensity is defined to be the power per unit area carried by a what?

Passage: Immune system organs include bone marrow, the thymus gland, the spleen, and the tonsils. Each organ has a different job in the immune system. Answer: immune system
Bone marrow, the thymus gland, the spleen, and the tonsils are organs in what body system?

Passage: If you look at the map pictured below, you will see that the lithosphere is divided into plates ( Figure below ). There are a dozen major and several minor plates. Each plate is named for the continent or ocean basin it contains. Some plates are made of all oceanic lithosphere. A few are all continental lithosphere. But most plates are made of a combination of both. Notice the locations where the most earthquake epicenters are found. Answer: continental and oceanic lithosphere
Most plates are made up of a combination of what?