Precession of Earth's Spin Axis Results in

question 52

Multiple Choice

Precession of Earth's spin axis results in

• A) changes of the positions of the constellations that are visible at night from Earth over the period of 1 year.
• B) a gradual shift of the vernal equinox along the ecliptic.
• C) a daily shift in the position of the overhead direction (the zenith) of an observer relative to the celestial equator (for an observer at a fixed location on Earth).
• D) a gradual change in the angle between the ecliptic and the celestial equator.

---

Definitions:

Reinforcement

In behavioral psychology, a consequence applied that strengthens an organism's future behavior whenever that behavior is preceded by a specific antecedent stimulus.

Unconditional Response

A natural, unlearned reaction to an unconditioned stimulus, a term primarily used in the context of classical conditioning in behavioral psychology.

Primary Circular Reaction

The term Piaget used to describe the infant’s tendency to repeat pleasurable bodily actions for their own sake.

Sucks His Fingers

A natural reflex for infants, often for comfort or self-soothing.