When Ice Floats in Water, a Small Part of It

question 18

Multiple Choice

When ice floats in water, a small part of it extends above the surface. Interestingly enough, the volume of ice that extends above the surface is equal to the volume of the

• A)water the ice displaces.
• B)vast number of open spaces in the hexagonal ice crystals.
• C)both A and B
• D)neither A nor B

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Definitions:

L-DOPA

A chemical precursor to dopamine, used as a medication to treat the symptoms of Parkinson's disease and dopamine-responsive dystonias.

Synaptic Transmitter

Chemical substances released by neurons to transmit signals across a synapse to another neuron, muscle, or gland.

Parkinson's Disease

A progressive neurological disorder characterized by motor symptoms such as tremors, stiffness, and slow movement, often linked to the depletion of dopamine.

Stimulant

A substance that raises levels of physiological or nervous activity in the body, often used to increase alertness, attention, and energy.