Janet V. Rostuk, age l2, of St. Catharines, Ont., Canada, for her question:

What part of the world has the highest tides?

Sunnier vacation finds many of us on the beach where the tides rise a few feet twice each day. Imagine tides that lift the water level 30 feet. There are several places in the world where the tides rise this high or a few feet higher. And there is one place where the people expect the highest tides to rise about 50 feet.

This place is Minas Basin near the upper part of the Bay of Fundy. so far as we know this Canadian inlet has the highest tides in the world. Cook Island in Alaska and Frobisher Bay in the Davis strait are North American inlets with tides of 30 feet or more. Puerto Gallegos in Argentina and St. Malo Bay in France also have 30 foot tides. But the water rushing into the Bay of Fundy raises tides that are 20 feet higher.