High- and low-pressure areas leading to air movement happen when there are differences in which factor? 1.)clouds

2.)atmosphere

3.)precipitation

4.)density

4, density.

Explanation:

air/atmosphere pressure is where the weight of air above us in the atmosphere. another word for weight = mass.

in theory, limestone is composed principally of the compound calcium carbonate - caco3, but in reality this compound is deposited in conditions involving a number of other compounds as impurities so it ends up being a mixture of many compounds.

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tony (lordcaos066)

a plasma is a warm ionized gasoline consisting of approximately equal numbers of definitely charged ions and negatively charged electrons. the characteristics of plasmas are notably unique from the ones of ordinary neutral gases in order that plasmas are considered a awesome "fourth kingdom of remember."