What type of volcano is fairly symmetrical and has both layers of lava and pyroclastic deposits?

Explain how a convection current in the earth is formed.

Which of the following describes what rocks usually are composed of ,

Which statement about portugal is not true? a. it granted independence to its last colony in 1975 b. it has avoided conflict with spain c. it was a leader in european world exploration in the 1400s d. its economy is changing from agricultural to industrial b. it has avoided conflict with spain