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.

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
Differences in air pressure over the surface of the Earth result in wind. The greater the differences in air pressures, the stronger the wind.

Question: As sound waves get shorter their frequency 
 Answer: increase
As wavelength increases, frequency decreases.

Question: An object with a small surface area is _____ likely to experience surface reaction than a larger object. 
 Answer: less

Surface Area of Reactants When a solid substance is involved in a chemical reaction, only the matter at the surface of the solid is exposed to other reactants. If a solid has more surface area, more of it is exposed and able to react.