Question bank: Units of Measurement: Temperature

During the winter holidays, João traveled with his family to a ski resort. On the first day of skiing, the temperature was 2 degrees Celsius. On the second day, due to a cold front, the temperature dropped to -5 degrees Celsius. What was the temperature variation in degrees Celsius from one day to the next?

Joãozinho loves adventures and is planning his first trip to the city of Moscow in Russia. He found out that the temperature there can be very cold, reaching up to -15 degrees Celsius in the winter. Can you help Joãozinho understand what this temperature means in degrees Celsius? Explain what temperature is and what it means when we say it's -15 degrees Celsius.

You may have noticed that when we look at a thermometer, we can see numbers with a 'C' or an 'F' next to them, like 25°C or 77°F. These numbers show us the temperature, which is how hot or cold something is. In the international system, we use degrees Celsius (°C) to measure temperature. But in some places, like the United States, they use Fahrenheit (°F). If the temperature in Celsius is 20°C, what would that same temperature be in Fahrenheit? Remember that the formula to convert from Celsius to Fahrenheit is F = (9/5)C + 32. Write down how you arrived at your answer.

Today, when you woke up, you looked at the thermometer outside your window and saw that the temperature was 18 degrees Celsius. This means the air was a bit cool. But, if the temperature rises by 10 degrees Celsius, what do you think will happen to the weather? Explain why a 10-degree Celsius change can make a big difference in the thermal sensation.

Let's imagine that we are on a very hot day and the thermometer marked 35 degrees Celsius. Now, thinking about the clothes we wear on different days, describe what would be your ideal outfit for a day with the temperature in degrees Celsius and explain why you chose these clothes. Remember to think about what is comfortable for you and how clothes help to keep the body warm or cool.