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

Q: Passage: Red litmus paper turns blue when placed in a basic solution. Answer: blue

A: Red litmus paper turns what color when placed in a basic solution?
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Q: Passage: The jointed appendages of arthropods may be used as legs for walking. Being jointed makes them more flexible. Try walking or climbing stairs without bending your knees, and you'll see why joints are helpful. In most arthropods, the appendages on the head have been modified for other functions. Figure below shows some of the head appendages found in arthropods. Sensory organs such as eyes are also found on the head. Answer: walking

A: What may the jointed appendages of arthropods be used for?
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Q: Passage: Two other types of mass movement are slump and creep. They usually aren't as destructive as landslides and mudslides. Slump is the sudden movement of large blocks of rock and soil down a slope. Creep is the very slow movement of rock and soil down a slope. It causes trees, fence posts, and other structures to tilt downhill. Answer: slump

A:
What type of mass movement is a sudden movement of large blocks of rock and soil down a slope?
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