Understanding Tidal Patterns and Types

The lecture covers three main tidal patterns observed globally: semi-diurnal, diurnal, and mixed tides. Semi-diurnal tides have two high and two low tides of equal size per lunar day, common on the east coast of North America. Diurnal tides, with one high and one low tide per day, are prevalent in the Gulf of Mexico. Mixed tides, featuring two highs and two lows of different sizes, are typical on the west coast of North America. The video explains these patterns with charts and discusses their geographical occurrences.

What are the three main tidal patterns discussed in the lecture?

• Semi-diurnal, diurnal, and mixed tides

• High tide, low tide, and spring tide

• Neap tide, spring tide, and mixed tide

• Diurnal, neap, and spring tides

How many high and low tides occur in a semi-diurnal tide?

• Four high and four low tides

• Three high and three low tides

• One high and one low tide

• Two high and two low tides

In which region are semi-diurnal tides most commonly found?

• Gulf of Mexico

• East coast of North America

• Indian Ocean

• West coast of North America

What is the main characteristic of a diurnal tide?

• Two high and two low tides of different sizes

• No tides at all

• One high and one low tide per day

• Two high and two low tides of equal size

Where are diurnal tides most commonly observed?

• Gulf of Mexico

• Atlantic Ocean

• East coast of North America

• West coast of North America

Which type of tide is common in closed basins like the Gulf of Mexico?

• Diurnal tides

• Semi-diurnal tides

• Spring tides

• Mixed tides

What is a common feature of mixed tides?

• Two high and two low tides of different sizes

• One high and one low tide per day

• No tides at all

• Two high and two low tides of equal size

Which coast of North America experiences mixed tides?

• Gulf coast

• West coast

• East coast

• Southern coast

What happens during the second high tide in a mixed tide pattern?

• It is higher than the first high tide

• It does not come as high up on the beach

• It does not occur

• It reaches the same height as the first high tide

What is the main difference between semi-diurnal and mixed tides?

• Semi-diurnal tides occur only once a month

• Mixed tides occur only in the Atlantic Ocean

• Mixed tides have two high and two low tides of different sizes

• Mixed tides have no low tides