What is the water table? a. a flat, table-like body of water b. the bottom surface of underground water c. the bottom layer of water in oceans, lakes, and rivers d. the upper surface of underground water

Option (D) is the correct answer.

Explanation:

Water table is defined as the upper most level of water that is present under the ground surface where there is permanent separation of soil or rocks with water.

Water table is maintained through a natural process as when it rains then the rain water seeps through the ground and reaches below the ground.

Water table is also known as ground water table.

Therefore, we can conclude that the water table is the upper surface of underground water.

most historians agree that gabriel mouton, the vicar of st. paul’s church in lyons, france, is the “founding father” of the metric system. he proposed a decimal system of measurement in 1670. mouton based it on the length of one minute of arc of a great circle of the earth (now called a nautical mile, 1852 meters). he also proposed the swing-length of a pendulum with a frequency of one beat per second as the unit of length (about 25 cm). a pendulum beating with this length would have been fairly easy to produce, thus facilitating the widespread distribution of uniform standards. over the years, his work was revised, improved, and extended by a number of french scientists.

the political sponsor of weights and measures reform in the french revolutionary national assembly was the bishop of autun, better known as talleyrand. under his auspices, the french academy appointed several committees to carry out the work of developing a usable system of weights and measures for france. one of the committees recommended a decimalized measurement system based upon a length equal to one ten-millionth of the length of a quadrant of the earth’s meridian (i.e., one ten-millionth of the distance between the equator and the north pole).