🌈 mindmap of Heat and Temperature

Heat and Temperature – Mindmap

1. Heat: Heat is a form of energy that flows from a body at higher temperature to a body at lower temperature. Its SI unit is joule (J).
2. Temperature: Temperature indicates the degree of hotness or coldness of a body. Its SI unit is kelvin (K). Relations: F = (9/5)C + 32, K = C + 273.
3. Thermal Expansion: Most substances expand on heating and contract on cooling due to increased molecular motion.
4. Anomalous Expansion of Water: When water is cooled from 4°C to 0°C, it expands instead of contracting.
5. Density–Temperature Relation of Water: Density of water is maximum at 4°C and decreases when temperature moves above or below 4°C.
6. Volume–Temperature Relation of Water: Volume of water is minimum at 4°C and increases on heating above 4°C or cooling below 4°C.
7. Effect of Anomalous Expansion: Lakes freeze from the top, allowing water below to remain liquid and support aquatic life in winte
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