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: An object with a rough surface will have _____ friction than an object with a smooth surface. 
 Answer: more
Friction is greater when objects have rougher surfaces or are heavier so they press together with greater force.

Question: When there is more fluid in a tube the pressure in the tube 
 Answer: increases
If blood volume in the body decreases, blood pressure decreases.

Question: Dean held two magnets at arms length, and did not feel them pull at each other. The magnets did start pulling at each other when they were 
 Answer: closer

The smaller the distance between the objects, the greater the force of magnetic attraction.