1)What kind of waves are present during an earthquake? 2)What is it called when light changes direction after leaving a lens?
3)When you leave wine exposed to the air, the ethanol in it reacts with oxygen to form what?
4)Iodine is used to test for what substance found in potatoes?​

after leaving a lens?

3)When you leave

stress fractures occur largely in the feet and legs and are common in sports that require repetitive impact, primarily running/jumping sports such as gymnastics or track and field.

answer; ///i believe the correct answer is (aids) acquired immune deficiency syndrome;