Explain why cooking utensils have metal bottom but plastic or ebonite handle.

Explanation

### Step-by-Step Solution

1. **Understanding the Materials**: Cooking utensils are designed with two different materials: metal for the bottom and plastic or ebonite for the handle.

2. **Thermal Conductivity of Metals**: Metals have high thermal conductivity. This means they can transfer heat quickly and efficiently. When the metal bottom of the utensil is placed on a burner, it heats up rapidly, allowing the food to cook evenly and effectively.

3. **Thermal Conductivity of Plastic/Ebonite**: In contrast, plastic and ebonite have low thermal conductivity. This means they do not transfer heat well. When you use these materials for the handle, they do not get hot, allowing you to hold the utensil comfortably without burning your hands.

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