TASK DEFINITION: Given a scientific passage and an answer, generate a question for the given answer.
PROBLEM: Passage: Waves are characterized by their ability to constructively and destructively interfere . Light waves which interfere with themselves after interaction with a small aperture or target are said to diffract . Answer: diffract

SOLUTION: Light waves which interfere with themselves after interaction with a small aperture or target are said to what?

PROBLEM: Passage: The hemisphere that is tilted away from the Sun is cooler because it receives less direct rays. As Earth orbits the Sun, the Northern Hemisphere goes from winter to spring, then summer and fall. The Southern Hemisphere does the opposite from summer to fall to winter to spring. When it is winter in the Northern hemisphere, it is summer in the Southern hemisphere, and vice versa. Answer: direct rays

SOLUTION: The hemisphere that is tilted away from the sun is cooler because it receives less what?

PROBLEM: Passage: The age of a rock in years is its absolute age. The main evidence for absolute age comes from radiometric dating methods, such as carbon-14 dating. These methods depend on radioactive decay. Answer: radioactive

SOLUTION:
Radiometric dating methods, such as carbon-14 dating depend on what type of decay?