TASK DEFINITION: Given a scientific passage and an answer, generate a question for the given answer.
PROBLEM: Passage: The alkaline earth metals include beryllium, magnesium, calcium, strontium, and barium. Strontium and barium react with air and must be stored in oil. Answer: alkaline earth metals

SOLUTION: Beryllium, magnesium, calcium, strontium, and barium are classified as what type of metals?

PROBLEM: Passage: Like a blanket on a sleeping person, greenhouse gases act as insulation for the planet. The warming of the atmosphere is because of insulation by greenhouse gases. Greenhouse gases are the component of the atmosphere that moderate Earth's temperatures. Answer: insulation

SOLUTION: Like a blanket on a sleeping person, greenhouse gases act as what for the planet?

PROBLEM: Passage: The dense, iron core forms the center of the Earth. Scientists know that the core is metal. The inner core is solid, and the outer core is molten. Here are some of the reasons they know this:. Answer: the outer core

SOLUTION:
Which layer of the earth is molten?