Why does natural gas floats above the petroleum deposits?

Explanation

**Step-by-Step Solution:**

1. **Understanding Density**: Density is defined as the mass of a substance per unit volume. It is a physical property that helps determine whether a substance will float or sink in another substance.

2. **Comparing Densities**: In this case, we need to compare the densities of natural gas and petroleum. Natural gas has a lower density compared to petroleum.

3. **Behavior of Substances Based on Density**: According to the principle of buoyancy, a substance with a lower density will float on a substance with a higher density. This is similar to how ice floats on water.

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