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The three common temperature scales are: 1. Celsius (°C) 2. Fahrenheit (°F) 3. Kelvin (K)

The freezing point of water is the temperature at which water changes from a liquid to a solid state (0 degrees Celsius). The following are the freezing points in each scale: 1. Celsius scale: The freezing point of water is 0°C. 2. Fahrenheit scale: The freezing point of water can be obtained using the formula: °F = (9/5) × °C + 32 Substitute the Celsius freezing point (0) into the formula: °F = (9/5) × 0 + 32 = 32°F So, the freezing point of water is 32°F. 3. Kelvin scale: The Kelvin scale is directly related to the Celsius scale with an offset of 273.15. To convert Celsius to Kelvin, you use the formula: K = °C + 273.15 Substitute the Celsius freezing point (0) into the formula: K = 0 + 273.15 = 273.15 K So, the freezing point of water is 273.15 K.

The boiling point of water is the temperature at which water changes from a liquid to a gas state (100 degrees Celsius). The following are the boiling points in each scale: 1. Celsius scale: The boiling point of water is 100°C. 2. Fahrenheit scale: Use the same formula as in step 2 to find the Fahrenheit boiling point, replacing the Celsius boiling point (100): °F = (9/5) × 100 + 32 = 212°F So, the boiling point of water is 212°F. 3. Kelvin scale: Use the same formula as in step 2 to find the Kelvin boiling point, replacing the Celsius boiling point (100): K = 100 + 273.15 = 373.15 K So, the boiling point of water is 373.15 K. In conclusion, the normal boiling and freezing points of water are: - Celsius scale: 0°C (freezing) and 100°C (boiling) - Fahrenheit scale: 32°F (freezing) and 212°F (boiling) - Kelvin scale: 273.15 K (freezing) and 373.15 K (boiling)