Question 2

While condensation happens when water vapor cools

Using "While" in the sentence indicates a contrast or a simultaneous occurrence, suggesting that condensation occurs concurrently with other processes in the water cycle.

A) While

"While" is the most appropriate transitional expression in this context, as it conveys that condensation occurs at the same time or as part of a process involving other elements of the water cycle. It effectively links the processes without implying a sequential relationship.

B) Furthermore

"Furthermore" suggests an addition or continuation of an idea, which does not fit the context. The sentence describes a specific occurrence in the water cycle rather than adding to a previous point.

C) Since

"Since" implies causation or a reason, which does not accurately reflect the relationship in the sentence. The cooling of water vapor leads to condensation, but using "since" would inaccurately suggest that condensation is solely a result of the cooling process without acknowledging its role in the cycle.

D) Moreover

"Moreover" also indicates an addition to a previous statement, which does not align with the intended meaning of the sentence. The focus is on the occurrence of condensation rather than introducing new information about the water cycle.

Conclusion

The use of "While" effectively captures the concurrent nature of condensation within the water cycle, making it the best choice. The other options fail to accurately represent the relationship of condensation to the processes described, either by suggesting causation or by implying an additive structure where none exists.