Asound wave traveling eastward through air
causes the air molecules to
(1) vibrate east and west
(2) vibrate north and south
(3) move eastward, only
(4) move northward, only

Complete the statement about memory improvement. ( )involves organizing and breaking down information into easier groups to expand capacity. rehearsal is the verbal repetition of information. these techniques are especially important for the improvement of ( ) memory.

Energy flows from the producer level to the level. is called

What are the starting materials for nuclear fission? two small nuclei two large nuclei a neutron and a large nucleus a neutron and a small nucleus