The Following Questions Refer to the Description and Figure Below

question 23

Multiple Choice

The following questions refer to the description and figure below.
The figure represents a cross section of the sea floor through a mid-ocean rift valley, with alternating patches of black and white indicating sea floor with reversed magnetic polarities. At the arrow labeled "I" (the rift valley) , the igneous rock of the sea floor is so young that it can be accurately dated using carbon-14 dating. At the arrow labeled "III," however, the igneous rock is about 1 million years old, and potassium-40 dating is typically used to date such rocks. Note: The horizontal arrows indicate the direction of sea-floor spreading, away from the rift valley.

Figure 25.1
-How many other bands of sea-floor crust in Figure 25.1 have the same magnetic polarity as the crust that directly straddles the rift valley?

• A) two bands
• B) four bands
• C) six bands
• D) eight bands
• E) ten bands

---

Definitions:

Facial Expressions

Elements of human nonverbal communication that involve movements or positions of the face to convey emotional states or reactions.

Sighted Athletes

Individuals who engage in sports activities and do not have visual impairments, contrasting with visually impaired or blind athletes.

Behavioural Component

The aspect of attitude that involves the way one acts or behaves towards an object or situation.

Laughing Uncontrollably

An involuntary reaction of laughing excessively without the ability to stop, often triggered by humor, certain stimuli, or sometimes neurological conditions.