What Could Cause a Canyon to Be Deeper Upstream Than

question 47

Multiple Choice

What could cause a canyon to be deeper upstream than downstream?

• A) the area upstream could be uplifted more than areas downstream
• B) the area upstream is higher above base level and so results in deep erosion
• C) a steeper gradient allows more erosion upstream
• D) all of these

---

Definitions:

Perceptual Set

A psychological mechanism that affects how we perceive stimuli; it is influenced by expectations, context, emotions, and culture.

Positive First Impression

The initial favorable perception or judgment formed about someone at the beginning of a social interaction.

Facial Expressions

Visible changes in the face that convey an individual's emotional state, intentions, or social communications.

Favorite Aunt

A term often used to describe an aunt with whom one shares a close and favorable relationship, exceeding typical familial bonds.