What is the definition of Mercury barometer?

"a barometer in which the weight of a column of mercury in a glass tube with a sealed top is balanced against that of the atmosphere pressing on an exposed cistern of mercury at the base of the mercury column, the height of the column varying with atmospheric pressure."Is the definition according to google:)

Explanation:

In barometer In the mercury barometer, atmospheric pressure balances a column of mercury, the height of which can be precisely measured.I HOPE IT HELPS:)in general it weighs atmospheric pressure and is a barometer:)

answer by yourhope:

answer is

human impact on the environment can be seen in the deterioration of the !

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the most common type of reef is the fringing reef. this type of reef grows seaward directly from the shore. they form borders along the shoreline and surrounding islands.