Volcanoes

Question 1

The two types of volcanoes are:

Answer 1

1. Shield volcano

2. Stratovolcano

Question 2

Shield volcano and stratovolcano are different in their physical appearance.

E.g. Shield volcano has wider base, while the base of stratovolcano is not as wide.

This is due to ____

Answer 2

SILICA content.

Shield volcano – LOWER in silica content, hence less viscous – lava can flow across a longer distance before cooling.

Stratovolcano – HIGHER in silica content, more viscous – lava flows across a shorter distance

Question 3

Which type of volcano has steeper slopes and taller in height?

Answer 3

Stratovolcano

Question 4

Which type of volcano has more violent eruption and why?

Answer 4

Stratovolcano because HIGH SILICA lava traps more air.