When Ice Floats in Water, a Small Part of It

question 31

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) vast number of open spaces in the hexagonal ice crystals.
• B) water the ice displaces.
• C) both of these
• D) neither of these

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Definitions:

Hypothalamus

A region of the brain that controls many bodily functions, including hunger, thirst, temperature regulation, and hormone release.

Sleep/Wake Cycle

The circadian rhythm regulating periods of sleep and wakefulness over a 24-hour cycle, influenced by environmental light-dark cycles and internal biological clocks.

Reticular Formation

A complex network of interconnected neurons located throughout the brainstem, essential for regulating wakefulness and sleep-wake transitions.

Basal Nuclei

Clusters of neurons located deep within the cerebral hemispheres involved in controlling movement and coordination.