Given a scientific passage and an answer, generate a question for the given answer.

Q: Passage: Many samples have a lot of variation in measurements. Variation can be described with a statistic called the range. The range is the total spread of values in a sample. It is calculated by subtracting the smallest value from the largest value. Answer: range

A: What term is used to describe the total spread of values in a sample?
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Q: Passage: Hinge Joint. The knee joint is a hinge joint. Like a door hinge, a hinge joint allows backward and forward movement. Answer: hinge joint

A: What type of joint is the knee joint?
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Q: Passage: Movable joints are also known as synovial joints . This is because the space between the bones is filled with a thick fluid, called synovial fluid , that cushions the joint (see Figure below ). Answer: synovial

A:
What is another term for movable joints?
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