instruction:
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.
question:
Question: Jerry weighs 200 pounds. Polly weighs 120 pounds. Who has more inertia? 
 Answer: Jerry
answer:
Objects with greater mass have greater inertia.


question:
Question: John was viewing a patient's vital signs at the hospital. He could see clearly that the less oxygen to the cells, the pulse rate would become 
 Answer: Higher
answer:
This causes the delivery of less oxygen to the cells, and this stimulates the heart rate via adrenalin, so that pulse rate increases in an effort to deliver enough oxygen to cells.


question:
Question: Eric has a soccer ball and kicks it into a rock of roughly the same size. The rock doesn't move and the ball bounces away. The ball is _____ dense than the rock. 
 Answer: less
answer:

The more tightly packed the particles inside the material are, the more dense we say they are.