TASK DEFINITION: Given a scientific passage and an answer, generate a question for the given answer.
PROBLEM: Passage: Figure 2.43 Positions and velocities of a metal ball released from rest when air resistance is negligible. Velocity is seen to increase linearly with time while displacement increases with time squared. Acceleration is a constant and is equal to gravitational acceleration. Answer: acceleration

SOLUTION: If a ball is released from rest when air resistance is negligible, velocity is seen to increase linearly, while what related property is a constant?

PROBLEM: Passage: Relative dating determines which of two fossils is older or younger than the other but not their age in years. Relative dating is based on the positions of fossils in rock layers. Lower rock layers were laid down earlier, so they are assumed to contain older fossils. This is illustrated in Figure below . Answer: relative

SOLUTION: What type of dating determines which of two fossils is older or younger than the other but not their age in years?

PROBLEM: Passage: A cirque is a rounded hollow carved in the side of a mountain by a glacier. The highest cliff of a cirque is called the headwall. Answer: a cirque

SOLUTION:
A rounded hollow carved in the side of a mountain by a glacier is known as?