Which of the Following Statements About the Mantle Is TRUE

question 12

Multiple Choice

Which of the following statements about the mantle is TRUE?

• A)The lithospheric mantle moves independently of the overlying plates.
• B)The asthenosphere and lower mantle are made of roughly the same composition material, only it behaves differently in the asthenosphere.
• C)The lower mantle is significantly less dense than the upper mantle.
• D)The upper mantle is liquid, but the lower mantle is solid.

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Definitions:

Glutamate

An important neurotransmitter in the brain that plays a key role in cognitive functions such as learning and memory.

Interneurons

Neurons that transmit signals between other neurons, especially as part of a reflex arc in the central nervous system.

Cortical

Relating to the outer layer of the cerebrum or cortex, involved in complex brain functions such as memory and consciousness.

Echolocation

A biological sonar used by several kinds of animals, such as bats and dolphins, to navigate and locate prey by emitting sound waves and listening for echoes.