Question

Explain in detail what causes tides and give one reason why it is important for humans to monitor tides. Explain the difference between a NEAP tide and a SPRING tide. (4 points)

But make it simple

Answer 1

1) What causes tides (simple, but detailed enough)
- Tides are mainly caused by the gravity of the Moon pulling on Earth’s oceans. The Moon’s gravity pulls water toward it, making a bulge (high tide) on the side of Earth facing the Moon.
- On the opposite side of Earth there is a second bulge. This happens because Earth and Moon orbit a common center; the outward “centrifugal” effect makes water on the far side form a bulge too.
- The Sun also pulls on the oceans, but its effect is about half as strong as the Moon’s.
- As Earth rotates, locations pass through those bulges, so most places get about two high tides and two low tides each day.

2) One reason humans monitor tides
- Safety and planning: knowing tide times and heights helps ships and boats avoid running aground, lets coastal communities prepare for flooding, and helps fishermen and coastal workers plan their activities.

3) Difference between a NEAP tide and a SPRING tide
- Spring tide: occurs when the Sun, Moon, and Earth are in a line (at new moon and full moon). Their gravitational pulls combine, producing higher high tides and lower low tides (largest tidal range).
- Neap tide: occurs when the Sun and Moon are at right angles relative to Earth (first and third quarter moons). Their pulls partially cancel, producing lower high tides and higher low tides (smallest tidal range).

(Extra simple note: spring and neap tides alternate about every week as the Moon moves through its phases.)