The less dense areas created as a sound wave propagates are called A. rarefactions✅
B. troughs
C. crests
D. compressions

I'm thinking it's 2 you are asked to explain the earth's magnetic field. which is the best reply? 1. the earth's magnetic south is similar to the north pole of a magnet. 2. the earth's core has a strong magnetic charge similar to the south pole of a magnet. 3. the earth's geomagnetic south is similar to the south pole of a magnet. 4. the earth's magnetic charge is not centered at either pole; it varies based on location.

Which accounts for an increase in the temperature of a gas that is kept a constant volume

Most short-period comets do not have randomly oriented orbits because