Which Igneous Rock or Magma Has the Lowest Silica (SiO₂

question 13

Multiple Choice

Which igneous rock or magma has the lowest silica (SiO₂ ) content?

• A)andesite
• B)granite
• C)peridotite
• D)basalt

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Definitions:

Iris

The colored part of the eye surrounding the pupil, responsible for controlling the size of the pupil and thus the amount of light that enters the eye.

Photoreceptor Cells

Specialized neurons in the retina that convert light into electrical signals, enabling vision.

Tinnitus

A condition characterized by hearing noises (such as ringing, buzzing, or humming) in the ears when no external sound is present.

Nystagmus

An involuntary, rapid movement of the eyeballs, which can be horizontal, vertical, or rotary.