Question

Periodic rise and fall of sea level is called

a. a tide.
b. an upwelling.
c. a thermocline.
d. sea level.

Answer 1

Tides refer to the periodic rise and fall of sea level caused by the difference in the strength of the Moon's gravitational pull on different parts of Earth.

Step-by-step explanation:

Tides refer to the periodic rise and fall of sea level caused by the difference in the strength of the Moon's gravitational pull on different parts of Earth. This phenomenon is responsible for the alternation between high tide and low tide. It is important to note that tides occur due to the gravitational interaction between the Earth, Moon, and Sun.

The Moon's gravitational force is stronger on the side of the Earth facing the Moon, causing a high tide, while the side opposite the Moon experiences a low tide.