In this task, you are given a question and answer for that. The answer will fill in the blank or will complete the unfinished question. Your task is to provide an explanation based on the given question or fill-in-the-blank statement, and answer.

Q: Question: Terry's system wastes 50% of its energy, while Rick's system wastes 75%. The more efficient system is 
 Answer: Terry's

A: The greater the wasted output energy, the less efficient the system.
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Q: Question: Simon was digging in his yard and found that the rocks that were shallower in the ground, compared to the surface rocks, were likely 
 Answer: younger

A: Therefore, deeper rock layers must be older than layers closer to the surface.
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Q: Question: If Mary is weighing two objects and she notices that her orange has a larger mass then her cherry, which object will have lesser momentum? 
 Answer: cherry

A:
An object has greater momentum if it has greater mass, greater velocity, or both.
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