# GCSE Physics 10.5

• ## 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.

• ### Classwork

• You worked through some past paper questions on radioactivity.
• ## 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

• 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.
• We then used this website to take some measurements of frequency and wavelength for a stationary source, and then moving towards and away from the observer.
• We when started to look at the doppler effect on light, and got up to defining 'blue shift'.
• ## Test, Proportionality

• ### Classwork

• We went through the test on waves.
• You made notes on proportionality, and different ways to test for it.
• ## Test

• ### Classwork

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

• No homework.
• ## Sterilization

• ### Classwork

• We watched this video which shows a gamma sterilization plant, and discussed various aspects in detail.
• ### Homework

• Revise for a test on waves on Thursday.
• ## EM Applications

• ### Classwork

• You did Q1 on P75 and I demonstrated interference with reflected waves using sound.
• You adedd to your notes on x-rays and CT scans, having already 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 for radiotherapy.
• 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 Thursday.
• ## Diffraction

• ### Classwork

• You did the questions on diffraction on P73 and we went through them together.
• I demonstrated the diffraction of a laser beam through a narrow slit.
• ### Homework

• Choose a diagram you like from here and add it to your notes.
• Do some revision for the test on the 28th.
• ## 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 Thursday 28th April.
• 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.
• ## EM Uses & Dangers

• ### Classwork

• We made brief notes on uses of EM radiation - you need to know about some of these in more detail.
• We made notes on "ionizing radiation", and also on the other dangers of parts of the EM spectrum.
• ### Homework

• Make notes on how x-rays are used in medical imaging, CT scans, and the similarities and dirrerences between a normal x-ray scan and a CT scan.
• Use P86-7 and this video. Bring your notes to next lesson.
• ## 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.
• We just need to finish adding a few more notes under that diagram next lesson.
• ### 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 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.
• ### Homework

• Watch and make notes on this video about wave measurements. P68 of the textbook will help.
• Bring notes to next lesson.
• ## 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 used this sheet to recap on the work you have done on gravitational potential energy and kinetic energy.
• We went through the sheet on rollercoasters.
• You did some calculations for energy transfers betwen gravitational and kinetic energy. Some of these problems were very hard - you did very well.
• I gave out the list of stuff you need to know for this topic.
• ### Homework

• Revise for test on Thursday 25th February.
• ## 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.
• ## Word and energy transfers

• ### Classwork

• I gave you some feedback on the HW - in particular, laying out your working clearly.
• We started to make notes on work and energy transfers and did some examples.
• ### Homework

• Watch this video which gives some examples for lifting (ran out of time for that in lesson).
• Answer Q1-2 on P41 and hand in tomorrow morning before registration.
• ## 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.
• ## Investigating Hooke's Law

• ### Classwork

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

• Plot a graph with F on y-axis and ΔL on x-axis.
• Write a short conclusion on the graph paper.
• Hand in tomorrow 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 dropped and reaching its terminal speed.
• We did some recap on distance-time graphs.
• ### Homework

• Use this website and this website to add to your notes about terminal velocity for a skydiver.
• In particular, please draw force diagrams for the skydiver: A) just as they leave the plane B) as they are falling (but not yet at terminal speed) C) when falling at terminal speed D) just after opening their parachute and E) after they have reached a new terminal speed with the parachute open.
• Leave some space next to each of these diagrams for us to add notes next lesson.
• PLEASE JUST MAKE YOUR ARROWS LONGER AND SHORTER like on the second website, rather than fatter and thinner as well (like the first site does).
• ## 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.
• ## COVER LESSON

• ### Classwork

• Read and make notes on P32-33. You do not need to memorise the distances in Figure 2.
• ### Homework

• Answer the questions on P33 and hand in tomorrow morning before registration.
• ## 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.
• ## Momentum and collisions

• ### Classwork

• We went over the HW.
• We did some examples of non-stick collisions.
• ### Homework

• Answer Q3-4 on P30 and hand in tomorrow morning before registration.
• ## Momentum, collsions and explosions

• ### Classwork

• You completed a sheet of examples where objects collide and stick together.
• I introduced explosions and did some demonstrations. You wrote some notes and we did an example.
• ### Homework

• Answer the questions on P25 and hand in tomorrow morning before registration.
• ## Momentum & collisions

• ### Classwork

• We went through some examples of solving problems using conservation of momentum when two objects collide and stick together.
• There were a lot of late homeworks - this needs to improve next week.
• ### Homework

• Watch this video which gives a really simple example to work through.
• Watch this video from 18:38 to 22:00. This is important as it shows you that momentum has direction (which is indicated with a plus or a minus).
• You must go through these examples before next lesson.
• ## Momentum

• ### Classwork

• We went through your HW and made notes on the origin of the elements.
• This completed the mini-topic of fission, fusion and stars.
• We started momentum and made some notes and did some example calculations including estimating quantities.
• ### Homework

• Answer the questions on P23 and hand in tomorrow morning before registration.
• Question 3b) is optional.
• ## 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.

• ### Classwork

• We went over carbon dating and did some examples.
• ### Homework

• Can't remember - didn't write it down at the time....
• ## More half-life

• ### Classwork

• 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.
• We plotted graphs of activity and dice remaining - the activity graph was messy, but the dice remaining graphs showed nice decay curves.
• You calculated the 'half-life' of your dice.
• WE AGREED TO DO A TEST ON THIS STUFF ON TUESDAY 13TH OCTOBER.
• ### Homework

• Make notes on radioactive dating, using this video (which is just about carbon dating) and P219 of the textbook.
• Bring your notes to next lesson.
• ## 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) - you can also compare with the other group's results which are very similar.
• 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.
• We also practised our languages a bit.
• ### 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.
• I demonstrated how to measure count rate and how to correct for the background count.
• ### 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).
• ### 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 & Isotopes

• ### Classwork

• We went through the HW.
• We did some examples of calculating the number of protons, neutrons and electrons in ions.
• If you missed the lesson, watch this video about ions.
• We made some notes about isotopes, and drew atoms of three different isotopes of hydrogen.