AP BIOLOGY

Detailed explanation-1: -The rest of the world, as well as scientists and engineers in the United States, use the Celsius (old name is centigrade) scale for temperature, where water freezes at 0°C and boils at 100°C. The Celsius scale is part of the metric system.

Detailed explanation-2: -Celsius is a relative scale. The temperature at which water freezes is defined as 0 °C. The temperature at which water boils is defined as 100 °C. Every temperature is expressed relative to this scale.

Detailed explanation-3: -Water freezes at 0°C and boils and vapourizes at 100°C only at atmospheric pressure. Change in pressure affects the boiling and melting points of water. For example, when the pressure is decreased, the boiling point of water decreases, meaning it gets boiled at a temperature lower than 100°C.

Detailed explanation-4: -Answer and Explanation: The correct response is the Celsius or Centigrade scale. Scientists and citizens of most countries employ the Centigrade or Celsius scale. It is on this scale that water freezes at zero degrees and boils at 100 degrees.

Detailed explanation-5: -Freezing point 32°F Boiling Point = 212 °F 100. Temperature in °Fly) isequivalent to .