(Q).
Q: When gas pressure-forces are used to move an object the work is done on the object by? Choices: - contracting gas - kinetic energy - gravitational pull - expanding gas A:
(A).
expanding gas

(Q).
Q: What is the main organ required for respiration in mammals? Choices: - the diaphragm - the heart - the brain - the lungs A:
(A).
the lungs

(Q).
Q: What term describes anything that occupies space and has mass, and is generally divided into three states? Choices: - stuff - lquid - galaxy - matter A:
(A).
matter