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

Ex Input:
Passage: outermost layer of the sun, made up of a plasma that extends millions of kilometers into space. Answer: plasma

Ex Output:
What is the outer layer of the sun made up of?

Ex Input:
Passage: Abrasion is another type of mechanical weathering. With abrasion, one rock bumps against another rock. Gravity causes abrasion as a rock tumbles down a slope. Moving water causes abrasion it moves rocks so that they bump against one another ( Figure below ). Strong winds cause abrasion by blasting sand against rock surfaces. Finally, the ice in glaciers cause abrasion. Pieces of rock embedded in ice at the bottom of a glacier scrape against the rock below. If you have ever collected beach glass or pebbles from a stream, you have witnessed the work of abrasion. Answer: mechanical

Ex Output:
What kind of weathering is abrasion?

Ex Input:
Passage: Chemical reactions are occurring all around you. Plants use sunlight to drive their photosynthetic process and produce energy. Cars and other vehicles burn gasoline in order to power their engines. Batteries use electrochemical reactions to produce energy and power many everyday devices. Many chemical reactions are going on inside you as well, especially during the digestion of food. Answer: photosynthesis

Ex Output:
What process allows plants to convert light energy into sugars and energy for food?