Jack is testing how sound travels. damon stood on the opposite side of the room and whispered a sentence to him. then, jack held a balloon to his own ear as damon whispered the sentence to him again. jack heard the sentence better the second time. how did the balloon affect the sound of damon's whisper? a) the latex the balloon is made of makes sounds seem louder. eliminate b) there is no air pressure inside the balloon, so it created a vacuum that made the sound louder. c) the pressure inside the balloon is less than the pressure inside jacks's ear, making the sound echo the second time. d) sound travels better through the compact molecules of air inside the balloon than the less compact molecules on the outside.

The correct answer will be option D.

Explanation:

In the given experiment of Jack and Damon- Jack heard the sentence better when he used balloon than without balloon suggests that sound waves traveled much clearer and faster than in open conditions as the air molecules packed inside the volume of the balloon are tightly packed or compact than the atmospheric gases.  

The compact arrangement of the molecules of the air enhances the effect of the sound by providing a good medium to travel the sound waves.

Thus, option D is the correct answer.

the generally accepted parts of modern cell theory include: all known living things are made up of one or more cells. all living cells arise from pre-existing cells by division. the cell is the fundamental unit of structure and function in all living organisms.

the correct answer is b