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.
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Question: Question: The hamstrings flex the leg, whereas the quadriceps femoris have what effect? Answer: extend

Answer: The hamstrings flex the leg, whereas the quadriceps femoris extend it.

Question: Question: What is another term for a hand lens? Answer: magnifying glass

Answer: An example of a lens is a hand lens, also called a magnifying glass. This type of lens makes objects look bigger than they really are. How do you think this happens?.

Question: Question: What is a measure of the amount of space a substance or an object takes up? Answer: volume

Answer:
Volume measures the amount of space that a substance or an object takes up. The basic SI unit for volume is the cubic meter (m 3 ).