In this task, you are given a question and answer for that. The answer will fill in the blank or will complete the unfinished question. Your task is to provide an explanation based on the given question or fill-in-the-blank statement, and answer.

[EX Q]: Question: While in the lab, Sharon and Joe were testing alkenes; Sharon's alkenes were much larger than Joe's. The melting point of Sharon's alkenes will be _____ than Joe's. 
 Answer: lower
[EX A]: Larger alkenes have lower boiling and melting points.

[EX Q]: Question: Lana is noting that the wind lately has been very weak. Lana can now tell that the air pressures over the Earth's surface have had differences that are 
 Answer: lesser
[EX A]: Differences in air pressure over the surface of the Earth result in wind. The greater the differences in air pressures, the stronger the wind.

[EX Q]: Question: If greenhouse gas were to be halved, the global temperature would 
 Answer: decrease
[EX A]:
A decrease in greenhouse gas levels decreases global temperature and an increase raises global temperature.