Question

1. the largest tidal ranges are seen in:

wide basins.
deep waters.
estuaries.
narrow basins.
shallow waters.
question 22

1. spring tides are caused by:

gravitational attraction of the moon and the sun when in line during the full and new moon phases.
gravitational attraction of the sun only.
ocean currents and gyre circulation.
gravitational attraction of moon and the sun when at right angles to each other.
gravitational attraction of the moon only.

Explanation:

Question 21

Tidal range is the difference between high and low tides. Estuaries (where rivers meet the sea) have large tidal ranges due to the funnel - like shape and the interaction of river flow with tidal forces. Wide basins, deep waters, narrow basins, and shallow waters generally don't have the largest tidal ranges compared to estuaries.

Spring tides occur when the sun, moon, and Earth are in a straight line (during full and new moons). The gravitational forces of the sun and moon combine, leading to higher high tides and lower low tides. The other options are incorrect: the sun alone or moon alone can't cause spring tides, ocean currents/gyre circulation don't cause spring tides, and when sun and moon are at right angles, neap tides occur.

Answer:

C. estuaries.

Question 22