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Transcript

THERMAL ENERGY

AND HEAT

Licencia de Creative Commons

Thermal 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

WRONG ANSWER

THAT'S CORRECT.

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

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

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.



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.

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.

PLAY WITH PLICKER APP



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.