Question

comparing sound waves and earthquake waves
which statement correctly compares sound and earthquake waves?
sound waves and all earthquake waves have compressions and rarefactions.
sound waves and all earthquakes waves have crests and troughs.
sound waves and some earthquake waves have compressions and rarefactions.
sound waves have crests and troughs and all earthquake waves have compressions and rarefactions.

Explanation:

Sound waves are longitudinal waves which have compressions and rarefactions. Earth - quake waves include both longitudinal (P - waves) which have compressions and rarefactions and transverse (S - waves) which have crests and troughs. So sound waves and some earthquake waves (P - waves) have compressions and rarefactions.

Answer:

Sound waves and some earthquake waves have compressions and rarefactions.