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: Viruses were assumed to exist before they were first seen with an electron microscope in which decade? Answer: 1930 ' s

SOLUTION: Viruses were assumed to exist before they were first seen with an electron microscope in the 1930s. Multiple hypotheses for viral origins have been proposed.

PROBLEM: Question: What is defined as a group of living and nonliving things and their environment? Answer: ecosystem

SOLUTION: An ecosystem is a group of living things and their environment. It is made up of both living and nonliving things.

PROBLEM: Question: Catalytic converters used on motor vehicles break down pollutants in what, yielding non-toxic compounds? Answer: exhaust

SOLUTION:
Catalytic converters are used on motor vehicles. They break down pollutants in exhaust to non-toxic compounds. For example, they change nitrogen oxides to harmless nitrogen and oxygen gases.