Seismic waves are used to determine that the interior of the Earth is divided into layers of rock with different properties. Seismic waves will or slow down depending on the of the material they're traveling through. When seismic waves reach the boundary between two layers, some waves will also (bounce) off that boundary and some will (bend) at the boundary. a) trueb) false

TRUE

Explanation:

The earth is made up of three distinct layers namely the crust, the mantle and the core, and the seismic waves namely P and S waves moves through these layers. The P and S waves are the Primary and Secondary waves respectively. The P wave can travel in both solid as well as liquid so it can travel into the inner core of the earth, where this wave gets curved or refracted at the mantle-inner core and inner core-outer core boundary. On the other hand, the S wave can travel on in solids, so it gets absorbs at the mantle-core boundary. This is how seismic reflection and refraction process takes place in the interior of the earth.

Thus, the above given statement is true.

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