Name two types of earthquake waves and explain how scientists use them to study earth's plz

Maybe this willl hellp"
Seismic waves are sent through the earth during earthquakes, and those energy waves are what cause the ground to shake as they travel through it.Seismic waves travel at different speeds when they pass through different types of material, so by studying seismograms, scientists can learn a lot about Earth's internal structure.Body waves are seismic waves that travel through Earth's interior, or its 'body.' Surface waves are seismic waves that travel through Earth's surface.Surface waves are important, but they don't provide much information about what happens below the surface. For this, we need to study body waves so that we can see what Earth's 'body' is like.

There are two types of body waves, called P waves and S waves. P stands for primary waves because these waves travel the fastest and are detected first. S stands for secondary waves because these are slower than P waves, arriving second on the seismogram.

Seismic waves from earthquakes led to the discovery of the earth's core and eventual maps of the layers of the Earth's inside and i think it primary and secondary seismic waves.