TASK DEFINITION: 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.
PROBLEM: Question: Keely had just run a mile and was now running slower to _____ _____. 
 Answer: cool down

SOLUTION: When particles move more slowly, temperature is lower and an object feels cooler.

PROBLEM: Question: Don notices that the patient's heart is expelling less blood with each stroke. The patient's heart has to beat _____ often to maintain consistent blood flow. 
 Answer: more

SOLUTION: When the heart expels more blood with each stroke, the heart has to beat less often in order to maintain the same volume of blood flow.

PROBLEM: Question: When you go into a cave, the rocks at deeper levels are _____ than the rocks on the surface. 
 Answer: older

SOLUTION:
The main law is the law of superposition. This law states that deeper rock layers are older than layers closer to the surface.