19. if volcanoes receive magma from the earth below them, what can you say about the amount of silica in…

19. if volcanoes receive magma from the earth below them, what can you say about the amount of silica in magma beneath earth’s continental crust? how do you know? (hint: cinder - cone volcanoes often form on land).

19. if volcanoes receive magma from the earth below them, what can you say about the amount of silica in magma beneath earth’s continental crust? how do you know? (hint: cinder - cone volcanoes often form on land).

Answer

Answer:

The magma beneath Earth's continental crust likely has a relatively high amount of silica.

Brief Explanation:

Cinder - cone volcanoes often form on land. Magma in continental crust areas that feed these land - based volcanoes is usually more viscous due to higher silica content. Higher silica makes magma thicker and more likely to build up pressure, leading to explosive eruptions characteristic of cinder - cone volcanoes.