Question

directions: select all the correct answers. which of the following are true about s waves? - they move rock at right angles to the direction of wave travel. - they can travel through solids. - they begin at an earthquake’s focus. - they can travel through liquids.

Explanation:

1. For the statement "They move rock at right angles to the direction of wave travel": S - waves (secondary waves) are shear waves. In a shear wave, the particle motion is perpendicular (at right angles) to the direction of wave propagation, so this statement is true.
2. For the statement "They can travel through solids": S - waves can travel through solid materials because they require a medium with shear strength. Solids have shear strength, while liquids and gases do not, so this statement is true.
3. For the statement "They begin at an earthquake’s focus": Earthquake waves, including S - waves, originate from the focus (hypocenter) of an earthquake, so this statement is true.
4. For the statement "They can travel through liquids": S - waves cannot travel through liquids (or gases) because liquids do not have the shear strength required to transmit S - waves. So this statement is false.

Answer:

• They move rock at right angles to the direction of wave travel
• They can travel through solids
• They begin at an earthquake’s focus