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⚙️ How does a lock keep water in

Explain how a canal lock keeps water in with solid gates, sluices, gravity, pressure balance, and a chamber that raises or lowers boats between different water levels.

lessons

~10 min

to learn

🔬 Science

subject

Adults

level

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What you’ll learn

The Chamber Makes A New Water LevelExplain how a lock chamber isolates a boat and creates a new water level between two pounds.Gates separate the chamber, while gravity and water levels make the boat rise or fall without a ramp.
Valves Control The ChangeTrace the sequence of gates and sluices that raises or lowers a boat.Sluices change the chamber level while main gates stay closed, and gates open only when levels match.
Water Pressure Makes The Lock ReliableConnect equal water levels with balanced pressure and safe gate operation.A lock works because gates contain, sluices meter, gravity drives flow, and matched levels make gates operable.

Questions this course answers

What is the main purpose of a lock chamber?

The chamber is an isolated section of canal that can be filled or emptied so a boat changes level with the water.

Put the uphill passage in the correct order.

A boat enters only when levels match, then the closed chamber is filled until it matches the higher pound.

Match each lock part with its job.

The lock works because each component has a different role in controlling the same water-level difference.

Why must the water levels match before a main lock gate opens?

Water pressure grows with depth and an unequal level creates a strong net push. Equal levels make the forces much closer to balanced.

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