Heat and Temperature - Science Lesson Slides PDF

temperature Heat and SLIDESMANIA.COM SLIDESMANIA.COM  SLIDESMANIA.COM Objective: - Understand the difference between heat and temperature SLIDESMANIA.COM  Warm- up...

temperature Heat and SLIDESMANIA.COM SLIDESMANIA.COM  SLIDESMANIA.COM Objective: - Understand the difference between heat and temperature SLIDESMANIA.COM  Warm- up Which would you rather have on a cold winter day? and why? SLIDESMANIA.COM Hot coffee Blanket  Any heat source, such as a flame, a hot plate SLIDESMANIA.COM SLIDESMANIA.COM  Thermal energy Thermal energy energy stored in a substance due to the movement of its particles. It is measured in joules. SLIDESMANIA.COM SLIDESMANIA.COM SLIDESMANIA.COM SLIDESMANIA.COM SLIDESMANIA.COM https://www.youtube.com/watch?v=9rmKtqpAt5I SLIDESMANIA.COM  Heat Measures the energy in the particles SLIDESMANIA.COM It is the total thermal energy of the vibrating particles in an object https://www.youtube.com/watch?v=9rmKtqpAt5I watch until 2:49 SLIDESMANIA.COM SLIDESMANIA.COM SLIDESMANIA.COM  Particles movement in both glasses ( cold water ) vs ( hot water ) Particle movement and temperature Simulation from http://www.middleschoolchemistry.com/multimedia/chapter1/lesson2 As we heat a substance, we see an increase in the speed of the particles as well as an increase in the space between particles. As we cool a substance, we see a decrease in the speed of the particles, as well as a decrease in the space between particles. (Recorded with http://screencast-o-matic.com) Simulation from http://www.middleschoolchemistry.com/multimedia/chapter1/lesson2 SLIDESMANIA.COM https://www.youtube.com/watch?v=Jy7n7_8B8DE SLIDESMANIA.COM  Why does larger volume have a higher heat? SLIDESMANIA.COM Larger volume = more particles = greater thermal energy  Temperature Why does ice cream melt faster on a hot day than on a cold day, even though it starts at the same temperature? SLIDESMANIA.COM  Slide 14 related video https://drive.google.com/file/d/1sdufE9_NMP4VC4S8zCK6WgjxoxVbJenF/v iew SLIDESMANIA.COM SLIDESMANIA.COM  Temperature SLIDESMANIA.COM Temperature gives us information about: Direction that the Average Direction Average thermal energy of energy will the particles be in an object transferred SLIDESMANIA.COM SLIDESMANIA.COM SLIDESMANIA.COM SLIDESMANIA.COM SLIDESMANIA.COM  The sparkler can be at a temperature of 1000 ⁰C, but why one spark doesn’t cause serious burns? SLIDESMANIA.COM SLIDESMANIA.COM SLIDESMANIA.COM  The mass of the spark is very small and the temperature difference between the air and the spark is very large. SLIDESMANIA.COM  The mass of the spark is very small So, there are fewer particles in the spark than in the main part of the sparkler, the total particle energy is much smaller. The total thermal energy or heat of the sparkle is very small. SLIDESMANIA.COM  The temperature difference between the air and the spark is very large. So, thermal energy will be transferred from the spark to the air quickly. In the short time the spark takes to fall to your skin, it’s temperature, and heat, have both decreased. SLIDESMANIA.COM SLIDESMANIA.COM  A scientist called Kelvin predicted that the particles would eventually stop if the temperature is low enough. Kelvin predicted that if particles stop moving, this would be the lowest possible SLIDESMANIA.COM temperature.  Interesting fact Do you know what is the lowest possible temperature in the universe? - 273 ⁰C (0 Kelvin) SLIDESMANIA.COM  Why is Absolute Zero The Lowest Possible Temperature? - YouTube SLIDESMANIA.COM  Kelvin called this temperature absolute zero. Absolute zero is -273 ⁰C ( 0 Kelvin) It’s not actually possible to make particles stop moving completely, but scientists have created temperatures that are SLIDESMANIA.COM very close to it in laboratories.  Remember Heat is the total thermal energy in an object, which is the total energy in all the particles. Unit of heat: Joule(J) Temperature is the average energy of the particles in an object. SLIDESMANIA.COM Unit of temperature: ⁰ C or Kelvin SLIDESMANIA.COM SLIDESMANIA.COM SLIDESMANIA.COM  Activity https://quizizz.com/admin/quiz/67a7990a5ea1d70624b7573f https://quizizz.com/admin/search/thermal%20energy%20and%20heat%20tr ansfer?section=library&source=MainHeader&page=ProfilePage&arid=f45d0 59e-f9fd-44dc-aaaa-667d17dd46f3&apos=- 1&term=thermal+energy+and+heat+transfer https://quizizz.com/print/quiz/67a529eefaed76d0dd233338 https://quizizz.com/admin/quiz/67a529eefaed76d0dd233338 SLIDESMANIA.COM Quizzez  https://www.tec-science.com/thermodynamics/temperature/temperature- and-particle-motion/ Very important SLIDESMANIA.COM