HELPPP How does the author show that he is writing for readers
who are not experts on volcanoes?
Read this excerpt from "Types of Volcanoes
Volcanoes are structures formed around openings
(vents) in the ground where molten lava, ash, or gaş
escape from inside the Earth. We have al heard of
lava, but not everyone knows how it forms. Deep inside
the Earth, rock that melted long ago beneath the
Earth's crust forms magma, a very hot liquid that mixes
with dissolved gases and crystals.
O He uses terms such as "ash," "crystals," "molten,"
O He writes about differences between what happens
O He uses terms such as vents and dissolved gases
O He says that the readers have all heard of lava, but
and "'magma."
to the ground and what happens under it
and crystals
not everyone knows where it comes from.