Question bank: Heat and Temperature

Thermal equilibrium plays an important role in maintaining Earth's climate. The planet absorbs more heat than it emits, causing global temperatures to rise. However, there are factors that influence this process, such as greenhouse gases. What are the main greenhouse gases?

When preparing for a trip to a mountainous region, a group of 7th grade students decide to study the differences between heat, temperature, and thermal sensation, knowing that these concepts are crucial to understand how to prepare for weather variations. Considering that heat is the form of energy that transfers between bodies of different temperatures, temperature is the measure of the degree of molecular agitation, and thermal sensation relates to the perception we have of temperature, which can be influenced by factors such as air humidity and wind, describe in detail the relationships between these concepts and how they apply in a practical situation for the students, such as choosing appropriate clothing for a winter day with strong winds. Explain what should be considered when evaluating thermal sensation in relation to air temperature and how knowledge about these phenomena can prevent situations of discomfort or health risks in extreme weather conditions.

During a science class, a student brings a mercury thermometer to school. He checks that the room temperature is 25 degrees Celsius. Then, the student holds the thermometer with one hand and notices that it starts to slowly warm up. The teacher explains that the heat transferred to the thermometer causes the mercury to expand, showing a higher temperature value. What is the name of the phenomenon that the thermometer is demonstrating when registering a higher temperature reading even though the environment has not become warmer? Briefly explain how the concept of heat is related to temperature reading in terms of thermal sensation.

During the winter months, it is common for people to use heaters to increase the temperature of their homes and make them more comfortable. Let's analyze how heat, temperature, and thermal sensation are related in this context.

Heat is a form of thermal energy that can be transferred from one body to another. When this happens, we say there has been a heat flow. Heat flow can occur in three different ways: conduction, convection, and radiation. Which one occurs when heat passes directly from one body to another, without the need for a medium?