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In Figure 10 you can observe that sometimes volcanic eruptions
are explosive and very dangerous.
The volcano erupts with a blast and lava, ash, dust and gas are
blown up very high in the air. A big volcanic cloud is formed.
Sometimes, when falling, the lava solidies quickly and
turns into volcanic bombs.
Later the ash and dust which have accumulated, solidify into a material called tuff.
a) What is magma?
b) What do the following terms mean?
i) Lava
ii) Basalt rocks
iii) Tuffs
Volcanic
bombs
The volcano erupts
with a blast and lava,
ash, dust and gas are
blown up very high
in the air.
fig.10 an explosive eruption
volcanic
eruption lava solidifies basalt
rocks
tuffs
solidify
ash+dust
volcanic
eruption
ACTIVITY