Someone please answer these for me:) :
1) how many seismic stations are needed to locate the epicenter?
2) what can you determine if you know the arrival time of the P wave and S wave at a seismic station?
3) are earthquakes cyclic?

Which best example best demonstrates the importance of having knowledge of evolutionary relationships? a. illustration of a plant b. organ transplantation between species c. blood donation from a human d. do you need sequence of an insect.

Fill in the blank with the correct sphere label. a: ⇒ geosphere b: ⇒ biosphere c: ⇒ hydrosphere

Achange in direction without a change in speed is called velocity