HEAT AND LIGHT

THERMAL ENERGY AND HEAT

Licencia de Creative CommonsThermal energy by MJ Rivas is licensed under a Creative Commons Reconocimiento 4.0 Internacional License.

INTRODUCTION HEAT AND LIGHT - Definition

Final Task - You have to complete a mind map with an interactive application. Examples: Popplet, Creately - In groups you have to explain an experiment related to the topic of thermal energy. Groups roles Tasks Outline Presentation Video Share in Edmodo app

IMÁGENES OBTENIDAS DE PIXABAY CON LICENCIA CREATIVE COMMON CCO. VIDEOS OBTENIDOSDE YOUTUBE CON LICENCIA YOUTUBE VIDEOS DE CREACIÓN PROPIOS ALOJADOS EN YOUTUBE Y CON LICENCIA CREATIVE COMMON. Autor: María José Rivas Nombre de usuario del autor: María José Rivas Fecha de publicación: 3/02/2017 Titulo del vídeo: Forms of energy_revision URL: https://youtu.be/DAZGnIY4PuQ Autor: María José Rivas Nombre de usuario del autor: María José Rivas Fecha de publicación: 2/02/2017 Titulo del vídeo: HEAT AND LIGHT URL: https://youtu.be/Zwm3n2YqGpw Autor: María José Rivas Nombre de usuario del autor: María José Rivas Fecha de publicación: 3/02/2017 Titulo del vídeo: Radiation URL:https://youtu.be/w7BOmnCBu-4 Autor: Science for Kids Nombre de usuario del autor: Science for Kids Fecha de publicación: 23/03/2015 Titulo del vídeo: Heat Transfer by Conduction – Science For Kids URL:https://youtu.be/DmnQD3eEkNk Autor: Science for Kids Nombre de usuario del autor: Science for Kids Fecha de publicación: 05/04/2015 Titulo del vídeo: Heat Transfer by Convection – Science For Kids URL:https://youtu.be/clIktVg_SSA Autor: Science for Kids Nombre de usuario del autor: Science for Kids Fecha de publicación: 12/10/2014 Titulo del vídeo:Conductors and Insulators - Electricity - Science for kids URL: https://youtu.be/qIF90dhqGPY Autor: Science for Kids Nombre de usuario del autor: Science for Kids Fecha de publicación: 03/05/2015 Titulo del vídeo: Primary Connections Science - Run, Run, Runny - Melting Moments URL:https://youtu.be/cG2ZRFVBQx8 Autor: Smartschoolonline Nombre de usuario del autor: Smartschoolonline Fecha de publicación: 17/12/2011 Titulo del vídeo: Evaporation and condensation URL: https://youtu.be/SfzUBe7lp44 Autor:PearsonMY Nombre de usuario del autor: PearsonMY Fecha de publicación: 16/12/2011 Titulo del vídeo: Contraction and Expansion URL: https://youtu.be/A6gpe61crdA Autor: Crash Course Kids Nombre de usuario del autor: Crash Course Kids Fecha de publicación: 16/07/2015 Titulo del vídeo:Chemical Changes: Crash Course Kids #19.2 URL:https://youtu.be/37pir0ej_SE

PREVIOUS KNOWLEDGE

HOW DOES THERMAL ENERGY TRAVEL THROUGH OBJECTS?

Thermal energy always travels from a hotter object to a colder one. For example, when we put a hot liquid into a cold container, the heat moves from the liquid to the container. The liquid gets colder, and the container gets hotter.

Look at this pictures. Which spoon will get hotter?

Thermal energy travels through objects in three different ways. Let's investigate

THAT'S CORRECT. The spoon in picture B will get hotter because the heat moves from the coffee to the cup and the spoon.

WRONG ANSWER

THERMAL ENERGY TRAVELS THROUGH OBJECTS IN THREE DIFFERENT WAYS:

CONVECTION

Do you want to learn more about CONDUCTOR and INSULATORS?

CONDUCTION

RADIATION

CHECK YOUR LEARNING.

WHAT ARE THE EFFECTS OF THE THERMAL ENERGY?

MELTING

EVAPORATION

EXPANSION

CHECK YOUR LEARNING.

CHEMICAL CHANGE

PLAY WITH PLICKER APP

EXPANSION Thermal energy causes the molecules in a solid, liquid or gas to vibrate.As a result, the material expands. Some materials expand faster than others, for example: gases expand faster than liquid or solids. Sometimes, when gases receive thermal energy, they expand very rapidly and cause explosions.

EVAPORATION When thermal energy is applied to a liquid, it changes into a gas. This process is called EVAPORATION. As the liquid receives thermal energy, its molecules move faster than before, and they separate from each other. Finally, the liquid changes into a gas.

MELTING When a solid receives thermal energy, it changes into a liquid. This process is called MELTING. As the molecules in the object receive thermal energy, they begin to move faster. They also move away from each other. The physical appearance of the object changes because the molecules are moving faster.

CHEMICAL CHANGES Thermal energy can cause chemical changes. When we cook food, the thermal energy of the oven causes permanent changes in the food. For example, when we make fairy cakes, we mix eggs, flour and sugar and get a thick liquid. Thermal energy changes this mixture into a solid fairy cake. This change can't be reversed: we can't change the fairy cakes back into eggs, flour and sugar again.