TASK DEFINITION: Given a scientific question and its correct answer, generate supporting facts for the answer. This supporting fact can be an explanation for the answer to the given question.
PROBLEM: Question: Magnetite crystals of different ages and on different continents pointed to different spots. the simplest explanation is that the continents have done what? Answer: moved

SOLUTION: Magnetite crystals of different ages and on different continents pointed to different spots. The simplest explanation is that the continents have moved.

PROBLEM: Question: What preventive measure can protect even young children against diseases such as viral meningitis? Answer: vaccination

SOLUTION: Children as young as 2 years of age can be vaccinated against viral meningitis.

PROBLEM: Question: What large carboxylic acid with three ionizable hydrogen atoms gives some fruits a sour or tart flavor? Answer: citric acid

SOLUTION:
Citric acid is a large carboxylic acid with three ionizable hydrogen atoms. It is found in citrus fruits and gives them their sour or tart flavor.