Question

seismic waves travel at different speeds according to type. what is the speed of seismic waves from fastest to slowest?\
\bigcirc p waves, l waves, s waves\
\bigcirc p waves, s waves, l waves\
\bigcirc s waves, l waves, p waves\
\bigcirc l waves, s waves, p waves

Explanation:

To determine the speed order of seismic waves: P - waves (primary waves) are the fastest as they are compressional and can travel through solids, liquids, and gases. S - waves (secondary waves) are slower than P - waves and can only travel through solids. L - waves (surface waves) are the slowest as they travel along the Earth's surface. So the order from fastest to slowest is P waves, S waves, L waves. Looking at the options, the first option is "P waves, L waves, S waves" (incorrect), the second option is "P waves, S waves, L waves" (correct), the third is "S waves, L waves, P waves" (incorrect), the fourth is "L waves, S waves, P waves" (incorrect).

Answer:

B. P waves, S waves, L waves (assuming the options are labeled as A, B, C, D with B being "P waves, S waves, L waves" as per the correct order)