Question

In 3-5 sentences, explain how gravity causes Earth's tides.(4 points)

Answer 1

The Moon’s gravity pulls more strongly on the side of Earth nearest the Moon, drawing ocean water toward it and creating a tidal bulge (high tide). On the side opposite the Moon, the Moon’s pull is weaker, and the inertia (centrifugal effect) of the Earth–Moon system leaves a second bulge, producing another high tide. As Earth rotates, different places pass through these bulges and experience alternating high and low tides. The Sun’s gravity also affects tides, reinforcing or weakening them depending on the Moon–Sun alignment.