Final answer:
The twice-daily movement of ocean waters, known as tides, is caused by the Moon's gravitational pull on Earth, leading to two high tides and two low tides each day due to the rotation of Earth through tidal bulges.
Step-by-step explanation:
The movement of water rising slowly and covering the land twice a day, then falling back is called tides.
This phenomenon is caused by the Moon's gravitational pull on Earth, which varies in different locations.
Tides are significant as they demonstrate the dynamic nature of Earth's oceans, resulting from the gravitational forces exerted by the Moon and, to a lesser extent, the Sun.
These tidal forces create two tidal bulges on opposite sides of the Earth.
As the Earth rotates, any given point on the Earth's surface experiences these bulges, leading to two high tides and two low tides every day.
This movement is crucial for coastal marine ecosystems and affects human activities such as fishing and navigation.