How does the use of a pH meter help monitor the hydrosphere? A. by indicating whether microorganisms are living in the water

B. by indicating if there is too much sediment in the water

C. by indicating whether the water is too acidic or basic

D. by indicating if there is enough dissolved oxygen in the water

The correct answer is - C. by indicating whether the water is too acidic or basic.

Explanation:

pH meter or pH scale is the color indicating scale to measure the acidity or basicity of the particular solution of the element. pH meter measures the hydrogen ion activity of the freshwater or saline water of the hydrosphere and if it is acidic or basic. It helps in determining if the water can be a drink or if the water body has an appropriate pH level for the organisms to live.

Thus, the correct answer is - C.

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americans began to notice growing differences between the northern and southern sections of the country. there were more people living in cities in the north, which made it more urban. more people lived on farms in the south, which made it more rural. while many people were farmers in the northern states, there were now other ways to make a living, such as working in mechanical cotton gins factories manufacturing cloth, tools and other goods. people in the north supported high tariffs on goods imported from europe because the extra cost encouraged people to “buy american” instead. in the southern states, planters did not like tariffs because they sold most of their production to europe and bought their tools from there as well. southerners believed the protective tariff was something that only northern factory owners keep their profits high. so the southern politicians came up with an idea. they would opt out. they would simply ignore the protective tariff. it was ‘null and void’ in south carolina. the state would not collect the taxes on goods imported into south carolina, no matter what the president said they had to do. this decision led to the nullification crisis.