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

Q: Passage: The composition of the magma determines if the rock is mafic, felsic, or intermediate. Answer: intermediate

A: The composition of the magma determines if the rock is mafic, felsic, or what?
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Q: Passage: The range is the total spread of values. It gives you an idea of the variation in the measurements. The range is calculated by subtracting the smallest value from the largest value. For the data in Table above , the range in numbers of vehicles by type is: 150 - 50 = 100. Answer: the range

A: What is calculated by subtracting the smallest value from the largest value?
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Q: Passage: Like all living things, plants detect and respond to stimuli in their environment. Unlike animals, plants can't run, fly, or swim toward food or away from danger. They are usually rooted firmly in the soil, like the tree in Figure below . Answer: soil

A:
Where are most plants firmly rooted?
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