Passing Arsenic Contaminated Water Through a Long Pipe Filled with Sand

question 54

Multiple Choice

Passing arsenic contaminated water through a long pipe filled with sand and iron powder leads to removal of the arsenic by

• A)a physical change.
• B)an oxidation-reduction reaction.
• C)ion exchange.
• D)filtering out the suspended arsenic particles.
• E)only a and b

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Definitions:

Somatosensory Cortex

A region of the brain in the parietal lobe that processes sensory information from the body, including touch, temperature, and pain.

Parietal Lobes

Lobes at the top of the brain’s cerebral cortex; they contain areas that receive information on pressure, pain, touch, and temperature as well as handle attention and awareness of spatial relationships.

Pressure

The force applied perpendicular to the surface of an object per unit area over which that force is distributed.

Cortex

The outer layer of the cerebrum, involved in numerous high-level brain functions such as thought, memory, and consciousness.