Compare temperatures above and below zero

Learning Objectives Define and identify temperatures above and below zero. Accurately locate and represent various temperatures on a number line. Compare any two given temperatures using appropriate inequality symbols (<, >, =). Order a set of multiple temperatures from coldest to warmest or warmest to coldest. Calculate the difference between two temperatures, including those spanning zero. Interpret and solve real-world problems involving temperature comparisons and changes. Have you ever checked the weather and seen temperatures like -10°C or 30°F? 🥶☀️ What do these numbers really mean, and how do we know which is colder or warmer? In this lesson, we'll explore how to understand, represent, and compare temperatures that fall both above and below the freezing...

TermDefinitionExample TemperatureA measure of the hotness or coldness of an object or environment, typically measured in degrees Celsius (°C) or Fahrenheit (°F).The temperature outside is 25°C, indicating a warm day. Zero Degrees (0°)The reference point on a temperature scale, often representing the freezing point of water (0°C) or a specific point on the Fahrenheit scale (0°F). It separates positive (above zero) and negative (below zero) temperatures.Water freezes at 0°C. Above Zero TemperatureTemperatures that are greater than zero, represented by positive numbers. These indicate warmer conditions.A temperature of 15°C is 15 degrees above zero. Below Zero TemperatureTemperatures that are less than zero, represented by negative numbers. These indicate colder conditions.A temperature of -...

Comparing Positive Temperatures For any two positive temperatures $T_1$ and $T_2$, if $T_1 > T_2$, then $T_1$ is warmer than $T_2$. When both temperatures are above zero, the larger numerical value indicates a warmer temperature. This is like comparing any two positive numbers. Comparing Negative Temperatures For any two negative temperatures $T_1$ and $T_2$, if $|T_1| < |T_2|$, then $T_1$ is warmer than $T_2$. Alternatively, if $T_1$ is closer to zero on the number line than $T_2$, then $T_1$ is warmer. When both temperatures are below zero, the temperature with the smaller absolute value (the one closer to zero) is actually warmer. For example, -2°C is warmer than -10°C. Comparing Positive and Negative Temperatures Any positive temperature $T_P$ is always warme...