# GCSE Physics 10.3

• ## Sound

• ### Classwork

• We finished going over the end of year exam.
• We started to recap on sound, and made some basic notes.
• I did a few demonstrations with a microphone and an oscilloscope, and we looked at the interpretation of oscilloscope traces.
• ## Going through exam

• ### Classwork

• We started to go through the end of year exam.
• We will finish this next lesson, then move on to the next topic: sound.
• ## Revision - Radioactivity, Fission & Fusion

• ### Classwork

• You did these past paper questions and I gave out the answers.
• ## Big Bang

• ### Classwork

• We made notes on the big bang theory, and the evidence provided by red shift of galaxies and cosmic microwave background radiation.
• The notes are here and the wording of the explanations is quite important.
• We also discussed whether or not we are at the centre of the universe's expansion. This is not on the syllabus but it's nice to understand.
• We then considered what could happen to the universe in future.
• ## Doppler effect, red shift

• ### Classwork

• We went over key ideas about the Doppler effect from your HW.
• I demonstrated this page which is really useful for seeing the cause of the Doppler efect.
• We discussed the doppler effect for light, and 'blue shift' and 'red shift'.
• You started to watch this video which shows how the theory of the Big Bang developed. More on this next lesson.
• ## Doppler Effect

• ### Classwork

• We went through the test on waves.
• You made notes on proportionality, and different ways to test for it.
• I gave out the list of stuff you need to know for the end of year exam.
• We started to make notes on the Doppler effect, and we went to the field where I demonstrated it using sound.
• ### Homework

• This interactive page is really good. Click and drag to fly the plane and see the waves.
• Make sure you have diagrams showing a source of waves moving towards an observer and away from an observer. (or you could do one diagram with two observers, one in front and one behind the source of waves.)
• Bring your notes and any questions to next lesson.

• ## Test

• ### Classwork

• We did some revision, then did the test on Waves.

• No homework.
• ## Cover Lesson

• ### Classwork

• Revise for the test on Thursday.
• I gave out the answers to the textbook questions in the lesson.

• Revise.
• ## EM Applications

• ### Classwork

• We got lots done today.
• We went over the HW and I demonstrated the question about the tea tray using a speaker as the source of waves and a microphone as the detector.
• You made notes on x-rays and CT scans, and we watched this video which gives a nice explanation.
• You then made notes on radiotherapy, and how damage to healthy tissue is minimized. We watched this video which shows x-rays being used to treat cancer.
• You made notes on sterilization, and the particular use of x-rays and gamma rays because they are so penetrating.
• ### Homework

• You might want to watch this video which shows a gamma sterilization plant.
• Revise for a test on waves next week. Monday will be a cover lesson for revision, then we will do the test on Thursday.
• ## Diffraction & Interference

• ### Classwork

• You did the questions on diffraction on P73 and we went through them together.
• I did a few demonstrations of interference - one with sound using two speakers and this website, and one with light (which is called Young's Double Slit Experiment.
• ### Homework

• Answer the questions on P75 and hand in before registration on Wednesday.
• ## Diffraction

• ### Classwork

• I gave out a slightly revised list of stuff you need to know for this topic.
• We agreed to do the end of topic test on Monday 25th April.
• Update: test moved to Thursday to give you more time to revise.
• You made notes on diffraction, and we drew some diagrams carefully.
• We discussed the diffraction of light around obstacles in the context of radio waves diffracting around hills.
• If you missed the lesson watch this video.
• ### Homework

• Make notes on wave interference using P74-5 and this video.
• NOTE you can stop the video when he starts talking about "standing waves" - you don't need to know about them till A Level.
• ## Wavefronts, Electromagnetic Spectrum

• ### Classwork

• We completed ray and wavefront diagrams for reflection and refraction. See full notes here.
• You can also watch an animation of refraction with wavefronts here.
• I introduced the electromagnetic spectrum with this video and we started to make notes.
• ### Homework

• Find the typical wavelength and frequency for each part of the EM spectrum.
• Find three uses for each part.
• Bring completed notes to next lesson.
• ## Reflection and refraction

• ### Classwork

• We went over the HW.
• We corrected the reflection diagram.
• You did a practical to investigate the refraction of light through a rectangular block.
• ### Homework

• Watch and make notes on this video about wavefronts and rays.
• Bring your notes to next lesson.
• ## Frequency, period, wave equation

• ### Classwork

• We did some examples of measuring the amplitude, wavelength and period of waves using this simulator.
• We then worked out the formulae f = 1/T and T = 1/f and did a number of examples of finding the frequency of a wave.
• I introduced the wave equation v = fλ and we did some examples, including sound waves and radio waves.
• You answered these questions which applied both the formulae above.
• ### Homework

• Draw labelled diagrams for:
• reflection of light from a plane mirror
• refraction of light through a rectangular block
• Hand in tomorrow morning by 9am.
• ## Longitudinal Waves

• ### Classwork

• We went through the test on forces.
• You made notes on longitudinal waves.
• ### Homework

• Watch and make notes on this video about wave measurements. P68 of the textbook will help.
• Bring notes to next lesson.
• ## Recap + test

• ### Classwork

• We did some recap on forces, momentum and energy.
• We did the test.

• No homework.
• ## Waves

• ### Classwork

• We made notes on waves.
• People demonstrated transverse and longitudinal waves on a slinky, and I also showed you transverse waves on a rope.
• We made notes on transverse waves and some examples - we will do longitudinal waves next lesson.
• ### Homework

• Revise for test on Thursday.
• ## Energy Transfers

• ### Classwork

• We went through the sheet on rollercoasters.
• You did some calculations for energy transfers betwen gravitational and kinetic energy.
• ### Homework

• Revise for test on Thursday 25th February.
• ## Energy Transfers

• ### Classwork

• We used this sheet to recap on the work you have done on gravitational potential energy and kinetic energy.
• We went over a couple of questions you had from the cover lesson last week.
• ### Homework

• Revise for a test on this stuff on Thursday 25th Feb.
• ## Cover Lesson

• ### Classwork

• By this stage you should have notes on Work, Power, Gravitational Potential Energy and Kinetic Energy.
• If you missed any of these lessons, please use P40-47 to catch up on areas you have missed.
• ## Gravitational Potential Energy

• ### Classwork

• I gave you some feedback on the HW.
• You made notes on gravitational potential energy, and we did some example calculations.
• ### Homework

• Use P46-7 and this video to make notes on kinetic energy.
• Bring your notes to next lesson.
• ## Work and Power

• ### Classwork

• We went through some examples of work done and energy transfers.
• We noted how important it is to consider the start and end point, and also the direction of the force and the motion.
• You made brief notes on power, and we did some power calculations.
• You started some past paper questions.
• ### Homework

• Finish the past paper questions and hand in tomorrow morning before registration.
• ## Work and Energy

• ### Classwork

• We started to make notes on work and energy transfers.
• We recapped on energy transfers, and on using Sankey diagrams to visualise them.
• ### Homework

• Continue your notes on work.
• Use P40-41 and the first half of this video - stop when he starts talking about asteroids.
• Bring your notes to next lesson, when we will do some examples.
• ## Hooke's Law

• ### Classwork

• We made notes on Hooke's Law, including the definition and equation.
• We did an experiment to collect more force/extrnsion data up to the point where a spring breaks.
• We considered what is meant by 'proportionality', and looked at graphs for things that were or were not proportional.
• ### Homework

• Answer Q6-7 on P38. Leave out 7b (the graph).
• Hand in tomorrow morning before registration.
• ## Hooke's Law

• ### Classwork

• We did the practical shown in the video from last lesson's HW.
• ### Homework

• Plot a graph of EITHER F on y-axis and ΔL on x-axis OR T on y-axis and m on x-axis.
• Write a short conclusion ON THE GRAPH PAPER.
• Hand in tomorrow morning before registration.
• ## Skydiver

• ### Classwork

• We went through the force diagrams for various stages of a skydiver doing a parachute jump.
• We dealt with the misconception of the skydiver moving upwards when the parachute is opened.
• You drew a speed-time graph for a skydiver and annotated it.
• You answered the questions on P35 and we went through most of them together.
• ### Homework

• Watch this video which shows an experiment you will do next week.
• The video is not in English - try to work out what is going on. I will ask some of you to do a voiceover in English next lesson.
• ## Terminal Speed

• ### Classwork

• You plotted graphs of a paper cone being droppen and reaching its terminal speed.
• We started to go through the explanation of why objects reach a terminal speed - we will continue with this next lesson.
• ### Homework

• For some reason I didn't set a homework.
• If you didn't have your notes to show me today please make sure you bring them next lesson.
• ## Terminal Speed

• ### Classwork

• You predicted how a feather and a rubber would fall when dropped.
• We did this experiment using a slow motion camera and compared the results to the predictions. You decided that air resistance caused the two objects to fall differently.
• We watched a video to see what happens if air resistance is removed.
• You did an experiment to find out whether the mass or the size of a paper cone affects its terminal speed.
• ### Homework

• Watch this video from 3:05 onwards and use P34-5 to make notes on Terminal Velocity.
• Bring your notes to next lesson.
• ## Testing Crumple Zones

• ### Classwork

• We went over the cover work you did on stopping distances.
• You designed, built and tested crumple zones and we analysed them using a slow-motion camera.

• No homework.
• ## More impact forces

• ### Classwork

• We went through the HW in detail.
• We did some more examples of collisions & impact forces.
• ### Homework

• Watch this video and make notes on P32-33. You do not need to memorise the distances in Figure 2.
• Bring your notes to next lesson.
• ## Impact Forces

• ### Classwork

• We made notes on impact forces.
• You learned a new formula - F = Δp/t
• We looked at impact forces in the context of car crashes, and explained how safety features worked.
• We looked at some car crash tests to see airbags and crumple zones in action.
• ### Homework

• Answer the questions on P27 and hand in tomorrow morning before registration.
• ## Collisions

• ### Classwork

• We went through some examples of collision calculations where the objects stick.
• ### Homework

• Correct your HW from last lesson, and bring your corrections to next lesson.
• If you need to print off a new sheet, you can find it here.
• ## Momentum, collsions and explosions

• ### Classwork

• I introduced explosions and did some demonstrations.
• You wrote some notes and we did an example, and answered the questions on P25.
• I introduced collisions where the objects collide and stick.
• ### Homework

• Complete the worksheet on collisions and hand in tomorrow morning before registration.
• ## Fusion & Stars

• ### Classwork

• We went through the HW and made notes on the formation of stars and the origin of the different elements found in our solar system.
• ### Homework

• We are now starting a new topic: momentum.
• Watch this video and use P22-3 to make notes about momentum.
• Bring your notes to next lesson.

• ## Fission/fusion recap

• ### Classwork

• We went over some key aspects of fission (chain reaction, parts of a nuclear reactor, control rods, water as a moderator)
• ### Homework

• Complete the past paper questions I gave out today (leave out 1d).
• Hand in tomorrow morning.
• ## Life Cycle of Stars

• ### Classwork

• Read and make notes on P230-232 (.Life history of a star. and .How the elements formed..
• Make a list of questions you want to ask me when I am back next week.
• ### Homework

• Go over the work you have covered in the last two weeks, and re-watch the videos for any areas you are not sure about.
• ## Nuclear Issues

• ### Classwork

• Read and make notes on .Nuclear Issues. on P226-7.
• Answer the questions on P227.
• ### Homework

• Watch https://www.youtube.com/watch?v=PM9CQDlQI0A (no need to make notes)
• ## Nuclear Fusion

• ### Classwork

• You will be given the answers to the HW questions . go through these and correct your answers.
• Make notes on nuclear fusion using P224-5.

• ## Nuclear Fission

• ### Classwork

• Use P222-3 to continue your notes on nuclear fission . you need to add:
• How a chain reaction can happen
• A diagram of a nuclear reactor, with the main parts labelled
• The function of control rods, and the use of water as a coolant and moderator
• Useful videos:
• ### Homework

• Answer Q1-2 on P223 and bring to next lesson.
• ## Nuclear Fission

• ### Classwork

• We went through the test.
• I gave out the list of stuff you need to know for the next topic - fission and fusion.
• We made notes on nuclear fusion, and just got up to the point where the neutrons produced in fission can go on to cause a chain reaction.
• If you missed the lesson, watch this video and see P222-3 of the textbook.
• We also looked at some equations for nuclear fission, and checked if the number of protons and neutrons was conserved.

• No homework.
• ## Test

• ### Classwork

• We did the test.

• No homework.
• ## Deflection in fields, recap

• ### Classwork

• We made notes on deflection of alpha, beta and gamma in electric and magnetic fields.
• We also made brief notes on the use of gamma for medical tracers.
• We put some people in the hot seat and asked them questions from this topic.
• ### Homework

• Revise for test next lesson.
• ## Carbon Dating

• ### Classwork

• We made notes on carbon dating. If you missed the lesson, watch this video.
• We did a quick example about a wooly mammoth, but we'll do more next lesson.
• ### Homework

• Revise for test.
• ## More half-life

• ### Classwork

• We worked out the half-life of protactinium-234 from the graph of our results from last lesson.
• We went over the HW.
• We made notes on the definition of half-life, defined 'activity', and contrasted activity with count rate.
• You did an activity with dice to model radioactive decay.
• ### Homework

• Each person in your pair should plot a graph of EITHER dice remaining against time, OR "activity" against time.
• BOTH of you should add a curve of best fit, and calculate the "half-life" of your dice.
• Hand your graphs in tomorrow morning before registration.
• ## Half-life

• ### Classwork

• We did a starter question to practise half-life calculations.
• I did a demonstration (with some useful assistants) to show you the decay of an isotope of protactinium.
• The results are here (I removed the first minute or so as the layer was still separating out) - we will find the half-life at the start of next lesson.
• We also refreshed your Excel skills when collecting and processing the data to get the corrected count rate in counts per minute.
• ### Homework

• Answer the questions on P217 and hand in before registration tomorrow morning.
• ## Uses of alpha, beta, gamma

• ### Classwork

• We went through key uses in detail - alpha in smoke alarms, beta in paper manufacture, gamma in radiotherapy, sterilization and leak detection.
• ### Homework

• Watch this video and use P216-7 to make notes on half-life.
• Bring your notes to next lesson.

• ### Classwork

• We identified the deacy processes in a decay chain.
• We went through the HW, classifying sources of background radiation as natural or man-made.
• I'm trialling a web-based whiteboard - you can now see notes from lessons here. We'll see if it's any good...
• We started the questions on P213 and went through Q1.
• ### Homework

• Research one use each for alpha, beta and gamma radiation.
• Minimum half a side of A4, maximum 1 side of A4.
• You can include pictures.
• Hand in before registration tomorrow morning.
• ## Balancing Nuclear Equations

• ### Classwork

• We made notes on beta decay and gamma emission.
• We did lots of nuclear equations.
• ### Homework

• Have a look at this chart which compares the 'dose' of radiation you get from different things.
• Bring your notes to next lesson.
• ## Alpha, beta and gamma radiation

• ### Classwork

• I demonstrated the penetrating power of alpha and beta radiation.
• We made some brief notes on measuring radiation and count rates.
• ### Homework

• Watch and make notes on this video about alpha decay.
• Bring your notes to next lesson, when we will do some questions and also do calculations for beta decay.

• ### Classwork

• I checked your understanding of isotope notation (like U-238).
• I briefly explained how relative atomic mass is calculated, but you will do this in chemistry.
• ### Homework

• Use P214-215 of the textbook and watch this video about the penetrating ability of alpha, beta and gamma.
• NOTE - this guy is NOT demonstrating good practice in terms of radiation safety!!!
• ## Ions

• ### Classwork

• We went through the HW.
• We made some short notes on ions, and did some examples of calculating the number of protons, neutrons and electrons in ions.
• If you missed the lesson, watch this video about ions.