P1 Energy & Waves Resources

Slides:



Advertisements
Similar presentations
P1a Energy & Energy Resources
Advertisements

P1.1.4 Heating and Insulating Buildings
P2.1 Resultant Forces P2 Physics Ks4 Additional Science Mr D Powell.
P1.4.2 The National Grid P1 Physics Mr D Powell.
P2.4.1 Household Electricity
Conduction Convection Radiation
P1.1.4 Heating and Insulating Buildings
G482 Electricity, Waves & Photons
P2.5.1 Atomic structure P2 Physics Ks4 Additional Science Mr D Powell.
P2.1.5 Forces and Elasticity
P2 Physics P2.1.3 Forces and braking Ks4 Additional Science
Connection Connect your learning to the content of the lesson
P1.1.3 Energy Transfer by Heating
3.3.1 Series and Parallel Circuits – Kirchhoff’s second law
Physics Unit 1 Lesson B1: Part 1 Energy Transfer
P2.6.2 Nuclear fusion P2 Physics P2.6.2 Nuclear fusion P2 Physics Mr D Powell.
P1 Energy & Waves Resources
Infra-Red Radiation Noadswood Science, Infra-Red Radiation  To understand what affects energy transfer by radiation Tuesday, May 12, 2015.
Bell Ringer Name: 2/23/2009 What do you believe color is? Response.
Chapter 22 Heat Transfer.
Radiation Infra-red radiation transfers heat between all objects. Infra-red radiation is an electromagnetic wave and can travel through a vacuum. Heat.
Thermal radiation Any object that is hot gives off light known as Thermal Radiation.  The hotter an object is, the more light it emits.  As the temperature.
P1.5.2 Reflection Mr D Powell. Mr Powell 2012 Index Connection Connect your learning to the content of the lesson Share the process by which the learning.
P2.6.1 Nuclear Fission P2 Physics P2.6.1 Nuclear Fission P2 Physics Mr D Powell.
4 Waves G482 Electricity, Waves & Photons 4 Waves G482 Electricity, Waves & Photons Wave Motion Wave Motion Mr Powell 2012 Index EM.
Radiation Heat Transfer. The third method of heat transfer How does heat energy get from the Sun to the Earth? There are no particles between the Sun.
Thermal Equilibration between 2 things : “Review” 1.No possible phase changes. Q H + Q C = 0. Solve for T f 2.Possible phase changes. Divide the process.
G482 Electricity, Waves & Photons
The transfer of energy by heating processes
P2.4.2 Current, Charge and Power P2 Physics P2.4.2 Current, Charge and Power P2 Physics Mr D Powell.
Keyword: Absorber Emitter Reflector
GCSE Core Physics EXAM TIP: Transfer of heat energy by infra-red radiation DOES not involve particles Keyword: Thermal,Thermal, Heat,Heat, Radiation,Radiation,
Understanding Heat Energy Transfer
Objective  The objective of this topic is to understand the methods of heat transfer Outcomes At the end of this session, students should be able to:
Heat Transfer Conduction, Convection, and Radiation.
30 th April 2015 LO: To understand what affects energy transfer by radiation Radiation STARTER: If conduction and convection need particles to transfer.
Define conduction and convection. Objectives Know: How heat is transferred by radiation Understand: Which situations use radiation in everyday life Outcomes.
L 18 Thermodynamics [3] Heat transfer Heat Capacity convection
  Beta version HEAT ENERGY PART 3: RADIATION.
Do Now: Based on the notes from last week, what is the difference between temperature and heat?
Conduction, Convection, and Radiation
PHYSICS – Thermal processes. LEARNING OBJECTIVES Conduction Core Describe experiments to demonstrate the properties of good and bad thermal conductors.
Infra-Red Radiation. Bell Work – Infra-Red Radiation.
3.3 Radiation Can heat be transferred from the Sun to us through conduction and convection? What is radiation? No! Conduction and convection cannot transfer.
What is Energy? Energy – the ability to do work Everything that is done in the universe requires the use or transfer of energy. Most of the surface processes.
Do Now: In you notes, describe what happens to an object as heat (energy) is added to it. What changes take place, what happens to the molecules? With.
Year 10 Science Heat and energy.
PSC 151 Laboratory Activity 10 Electromagnetic Radiation I.
Explain where heat is “coming from” and “going to” in this picture.
Making use of Energy 3.3 (a) how temperature differences lead to the transfer of energy thermally by radiation.
Heat in the Atmosphere.
Starter - 5 minutes only Add banding mark to tracking sheet & write a target to improve. >17 E 11 – 16 C 9 – 10 S 7 – 8 D < 7 F Correct answers using.
Convection examples Which of these is an example where convection currents are created? Dark fields heating up more than green fields Sea Breeze Saucepan.
Thermal radiation.
Starter Explain why the following items are made with the surfaces shown. What colour would you make something if you wanted it to absorb heat quickly.
L 18 Thermodynamics [3] Heat transfer Convection conduction radiation
Understanding Heat Transfer, Conduction, Convection and Radiation
Physics 1 Revision Lesson 1 Kinetic theory and Heat transfers
Methods of Heat Transfer
Radiation Learning Objectives:
L 18 Thermodynamics [3] Heat transfer Heat Capacity convection
Radiation D. Crowley, 2008.
Understanding Heat Transfer, Conduction, Convection and Radiation
HEAT TRANSFER.
Heat.
Presentation transcript:

P1 Energy & Waves Resources P1 Physics Mr D Powell

Connection Connect your learning to the content of the lesson Share the process by which the learning will actually take place Explore the outcomes of the learning, emphasising why this will be beneficial for the learner Demonstration Use formative feedback – Assessment for Learning Vary the groupings within the classroom for the purpose of learning – individual; pair; group/team; friendship; teacher selected; single sex; mixed sex Offer different ways for the students to demonstrate their understanding Allow the students to “show off” their learning Consolidation Structure active reflection on the lesson content and the process of learning Seek transfer between “subjects” Review the learning from this lesson and preview the learning for the next Promote ways in which the students will remember A “news broadcast” approach to learning Activation Construct problem-solving challenges for the students Use a multi-sensory approach – VAK Promote a language of learning to enable the students to talk about their progress or obstacles to it Learning as an active process, so the students aren’t passive receptors

Quick Summary....

P1.1.1 Infrared radiation a) All objects emit and absorb infrared radiation. b) The hotter an object is the more infrared radiation it radiates in a given time. c) Dark, matt surfaces are good absorbers and good emitters of infrared radiation. d) Light, shiny surfaces are poor absorbers and poor emitters of infrared radiation. e) Light, shiny surfaces are good reflectors of infrared radiation.

Thermal Radiation Quick Questions 1 Where does this planet get its energy from?   2 What does a prism do to white light?   3 What is the rough temperature of the surface of the sun?   4 What does thermal mean?   5 What is infra red radiation?  6 Why is infra red radiation captured by the atmosphere and not UV or visible   7 How can we reduce the greenhouse effect?   8 How can you tell if a metal is very hot   9 Do all objects give out thermal radiation   10 Do all objects absorb thermal radiation  

Thermal Radiation Quick Questions 1 Where does this planet get its energy from?   Sun 2 What does a prism to do white light?   disperse it 3 What is the rough temperature of the surface of the sun?   5500C 4 What does thermal mean?   heat 5 What is infra red radiation?  thermal radiation beyond visible red light 6 Why is infra red radiation captured by the atmosphere and not UV or visible  (A*-C) it has a longer wavelength   7 How can we reduce the greenhouse effect?   reduce emissions of certain gasses like methane, CO2 8 How can you tell if a metal is very hot   glows brightly 9 Do all objects give out thermal radiation   yes 10 Do all objects absorb thermal radiation  

M Seeing at Night Can you identify the objects? Discuss with a partner which parts are hot parts compared to the cold parts? Why might this be?

M Energy Movement Watch the FLV of the snapshots shown. For each one explain what you are seeing in terms of energy transfers. Pouring water Thermometers Breast Exams

Temperature & Colour Theory.... The main frequency (or colour) of emitted radiation increases as the temperature increases. For example, a red hot object radiates most in the long wavelengths of the visible band, which is why it appears red. If it heats up further, the main frequency shifts to the middle of the visible band, and the spread of frequencies mentioned in the first point make it appear white. We then say the object is white hot..

P Order of Temperature Sparkler Light bulb Ice water Sun Sunny day Fire In a team sequence these images into an order for which is hottest and which is coolest. Try and work out what the clues were

Order of Temperature Ice water 0 Sunny day 23 Sun 5500 Light bulb 247 Sparkler 1000-1600 Fire 500

S Groups? In a team group these images to reflect their energy characteristics. Elect a spokesperson to explain why you have done this!

M Theory of EM Radiation EM radiation is produced by objects all the time even though they don’t appear to be doing much. It is in fact internal energy from the object converted to either visible EM radiation i.e. ROY-G-BIV or non visible light Infra red. It is the infra red part that makes them feel hot!

Absorption & Emission of EM Radiation A perfect black object absorbs all the visible light and IR then emits the IR really well. It feels hotter to the touch A perfect white object reflects all the colours and IR and UV radiation. It feels cooler to the touch. A good example is white lines on our roads...or a t-shirt Look at the demo of shiny v matt for visible light as an example!

M Shiny or Dull Theory... A mirrored surface reflects all the radiation striking it and absorbs none. Therefore a mirror cannot emit large amounts of radiation. A matt dull surface absorbs more radiation due to cavities in the surface. (crevices) A polished ring will be cooler than a dull one. Extension TASK – Now answer the questions on page 213

Solar Panels Now you have listened to your teacher explain how a solar panel works make up your own flowchart to explain the process (including diagrams). Fill in as much detail as you can and use as many steps you as want! Extension Task Now imagine you science consultant who designed the panels got his science the wrong way around. What mistakes could he have made to make the panel useless!

M Leslie Cube... You an investigate the whole process by using a Leslie Cube...

Reflectors & Absorbers... dark,matt surfaces 5 mins later Dark matt surfaces emit (give out) more radiation…than light shiny surfaces at the same temperature. 5 mins later light,shiny surfaces

Reflectors & Absorbers... 5 mins later Dark matt surfaces are better absorbers (poorer reflectors) of radiation…than light shiny surfaces at the same temperatures. dark,matt surfaces 5 mins later light,shiny surfaces

M Emission experiment... Four containers were filled with warm water. Which container would have the warmest water after ten minutes? Shiny metal Dull metal Dull black Shiny black The __________ container would be the warmest after ten minutes because its shiny surface reflects heat _______ back into the container so less is lost. The ________ container would be the coolest because it is the best at _______ heat radiation. shiny metal radiation dull black emitting

Absorption experiment... Four containers were filled with warm water. Which container would have the warmest water after ten minutes? Shiny metal Dull metal Dull black Shiny black The __________ container would be the warmest after ten minutes because its surface absorbs heat _________ the best. The __________ container would be the coolest because it is the poorest at __________ heat radiation. dull black radiation shiny metal absorbing

P Dull Black Car Shiny Black Car Brushed Steel Car Shiny Steel Car Decisions See if you can you sort these in the correct order of which would be the best absorbers of heat.... Shiny Black Car Shiny Steel Car Dull Black Car Brushed Steel Car Dull Black Car Shiny Black Car Brushed Steel Car Shiny Steel Car

Question 1 matt surfaces shiny surfaces particles Infra red

Consolidate – How can you explain these things... a) All objects emit and absorb infrared radiation. b) The hotter an object is the more infrared radiation it radiates in a given time. c) Dark, matt surfaces are good absorbers and good emitters of infrared radiation. d) Light, shiny surfaces are poor absorbers and poor emitters of infrared radiation. e) Light, shiny surfaces are good reflectors of infrared radiation. P1.1.1 Infrared radiation