Section 1
Thermal Energy Flows from Hot to Cold
Thermal energy, the energy of moving particles in matter, always transfers from warmer objects to cooler ones. The more thermal energy particles have, the faster they move.
In this Grade 4 lesson from Science: A Closer Look, Chapter 6, students explore thermal energy and learn how heat flows from warmer objects to cooler objects through three processes: conduction, convection, and radiation. Students also discover the difference between thermal energy and temperature, and how thermometers measure temperature using both the Fahrenheit and Celsius scales. The lesson introduces key vocabulary including insulators and conductors to explain why some materials transfer thermal energy more effectively than others.
Section 1
Thermal Energy Flows from Hot to Cold
Thermal energy, the energy of moving particles in matter, always transfers from warmer objects to cooler ones. The more thermal energy particles have, the faster they move.
Section 2
Matter Transfers Heat Through Three Methods
Conduction occurs when objects touch, transferring energy between particles. Convection moves heat through liquids and gases via circulation. Radiation transfers energy through space, requiring no medium.
Section 3
Materials Conduct or Block Heat Transfer
Conductors like metal efficiently transfer thermal energy, making them useful for cooking. Insulators such as fleece, wool, and body fat resist heat transfer, helping maintain temperature differences.
Section 4
Thermal Energy Changes Matter's Properties
Adding thermal energy causes matter to expand as particles move faster and farther apart. With enough energy, matter can change state, transforming from solid to liquid to gas.
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Section 1
Thermal Energy Flows from Hot to Cold
Thermal energy, the energy of moving particles in matter, always transfers from warmer objects to cooler ones. The more thermal energy particles have, the faster they move.
Section 2
Matter Transfers Heat Through Three Methods
Conduction occurs when objects touch, transferring energy between particles. Convection moves heat through liquids and gases via circulation. Radiation transfers energy through space, requiring no medium.
Section 3
Materials Conduct or Block Heat Transfer
Conductors like metal efficiently transfer thermal energy, making them useful for cooking. Insulators such as fleece, wool, and body fat resist heat transfer, helping maintain temperature differences.
Section 4
Thermal Energy Changes Matter's Properties
Adding thermal energy causes matter to expand as particles move faster and farther apart. With enough energy, matter can change state, transforming from solid to liquid to gas.
Book overview
Jump across lessons in the current chapter without opening the full course modal.
Continue this chapter