Kenyon Frye

Geography

15 October, 05:54

Question 9. Which one of the following statements concerning volcanic blocks and bombs is true

A. Bombs and blocks are both smaller than lapilli and cinders.

B. Bombs and blocks are made of fused volcanic ash

C. Bombs and blocks are both considered to be forms of tephra

D. Blocks are broken fragments of solid rocks; bombs have smaller sizes than lapilli.

Question 10. Which statement is true of conduits and vents?

A. Magma flows from the conduit to the vent.

B. Vents supply magma to the magma chamber under a volcano.

C. Magma flows from the vent to the conduit.

D. Conduits form directly under craters.