When a ship enters sea water from fresh water it sinks less.

Explanation

To understand why a ship sinks less in seawater compared to freshwater, we can break down the explanation into several steps:

### Step-by-Step Solution

1. **Understanding Density**:
- Density is defined as mass per unit volume. It is a measure of how much mass is contained in a given volume of a substance.
- Seawater has a higher density than freshwater because it contains dissolved salts and other minerals.

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