If you were a geologist, how would you determine if the core of the earth is liquid or solid?

S waves do not pass through it, but P waves do. The behavior of P and S waves also indicates that the inner core is solid.

desert perennials often survive by remaining dormant during dry periods of the year, then springing to life when water becomes available. most annual desert plants germinate only after heavy seasonal rain, then complete their reproductive cycle very quickly.