The First Two Units Took 28

question 21

Multiple Choice

The first two units took 28.5 days to finish and the subsequent two units took 24.8431 days to complete. What is the learning rate?

• A) 80%
• B) 85%
• C) 90%
• D) 95%

---

Definitions:

Cleavage

Cleavage in geology refers to the tendency of minerals to split along specific planes where the bonds are weakest, resulting in smooth, flat surfaces.

Noble Gases

A group of chemical elements with very low reactivity, including helium, neon, argon, krypton, xenon, and radon.

Periodic Table

A tabular arrangement of chemical elements, organized on the basis of their atomic numbers, electron configurations, and recurring chemical properties.

Rock-forming Minerals

Minerals that make up a significant part of the Earth’s crust, playing a key role in the formation of rocks.