Rounded Ice Grains, Called Firn, Form If

question 1

Multiple Choice

Rounded ice grains, called firn, form if:

• A) snow survives through one summer.
• B) snow survives through two summers.
• C) it falls on basal ice.
• D) it falls on ablation ice.

---

Definitions:

Perception

The process by which individuals organize and interpret their sensory impressions to give meaning to their environment.

Transduction

A process by which sensory receptors change physical stimuli into signals that are eventually sent to the brain.

Thalamus

A crucial brain structure acting as a relay station for information between the cerebral cortex and the rest of the body.

Hypothalamus

A region of the brain that controls an immense number of bodily functions including emotions, autonomic functions, and hormone production.