Under what condition does a location experience high tide?

Under what condition does a location experience high tide?

• A. The Moon is directly overhead or on the opposite side of Earth
• B. The Sun is overhead
• C. The Moon is at last quarter
• D. The Moon is new moon

Answer: (A)

Tides come from the Moon’s gravity pulling on Earth’s oceans, creating two bulges: one toward the Moon and one on the far side due to inertia. When you’re right under the Moon (the Moon is directly overhead) or on the opposite side of Earth from the Moon, you’re sitting on one of those bulges, so the water level is at its highest—high tide. The Sun also affects tides, especially when it lines up with the Moon, but the immediate condition for a high tide at a location is being aligned with the Moon’s bulge—overhead or opposite. The Moon’s phase (like last quarter or new moon) doesn’t by itself determine the local high tide, since what matters is the geometry of the Moon’s position relative to your place on Earth.

Tides come from the Moon’s gravity pulling on Earth’s oceans, creating two bulges: one toward the Moon and one on the far side due to inertia. When you’re right under the Moon (the Moon is directly overhead) or on the opposite side of Earth from the Moon, you’re sitting on one of those bulges, so the water level is at its highest—high tide. The Sun also affects tides, especially when it lines up with the Moon, but the immediate condition for a high tide at a location is being aligned with the Moon’s bulge—overhead or opposite. The Moon’s phase (like last quarter or new moon) doesn’t by itself determine the local high tide, since what matters is the geometry of the Moon’s position relative to your place on Earth.