The hotness of an object is determined by its _____

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks what determines the hotness of an object. In scientific terms, hotness is related to the energy of the particles within an object.

2. **Identifying the Key Concept**: The key concept that relates to the hotness of an object is temperature. Temperature is a measure of the average kinetic energy of the particles in a substance.

3. **Explaining Temperature**: When we say an object is hot, we are referring to its temperature. A higher temperature indicates that the particles in the object are moving faster, which means the object has more thermal energy.

4. **Comparing Two Objects**: If we have two objects, say object A and object B, we can determine which one is hotter by measuring their temperatures. For example, if the temperature of object A (T1) is greater than the temperature of object B (T2), then object A is hotter than object B.

5. **Conclusion**: Therefore, the hotness of an object is determined by its temperature. The higher the temperature, the hotter the object.

**Final Answer**: The hotness of an object is determined by its **temperature**.

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