# GCSE Physics - 9.3

• ## Cover Work

• ### Classwork

• Your end of year exam has not been marked yet – we will go through it next week.
• ### Homework

• Watch this video and try to work out how the toy works. Be ready to explain next lesson.
• ## Thermal physics

• ### Classwork

• We started work on this sheet.
• Progress was slow. We will go thought it next lesson.

• Revise.
• ## Graphs of Motion, Adding Vectors

• ### Classwork

• We did this task and went through it:
• A teacher paces backwards and forwards across the classroom twice. They walk at a constant speed of 1m/s. The room is 5m wide. Draw:
• a) a displacement-time graph
• b) a velocity-time graph
• c) a distance-time graph
• d) a speed-time graph
• Then we did a vectors task that you have done before to recap on the parallelogram method.
• I also invented an amazing game.
• ## Going through test

• ### Classwork

• We went through the test.
• I gave out the list of things you need to know for the end of year exam.

• Revise.
• ## Test

• ### Classwork

• We made some notes on the filament lamp.
• We did the test.
• ## LED

• ### Classwork

• We experimented with thermistors.
• We made notes on LEDs, and predicted whether LEDs in different circuits would light.
• ### Homework

• Revise for test next Wednesday.
• ## Thermistor & LDR

• ### Classwork

• We used this circuit modelling software to test predictions about voltage and current in circuits.
• We made notes on thermistors and LDRs - what affects their resistance, and what they are used for.
• ## Circuit Calculations

• ### Classwork

• We went through the rest of the sheet from last week.
• We worked out as much as we could about this circuit - we will discuss the current in different parts of the circuit next lesson as we didn't have time for this.
• ### Homework

• Revise for test on 6th May.
• ## Circuit Rules

• ### Classwork

• We went through these circuit rules.
• We did these questions and went through Q1-3 together. We will go through Q4 next lesson.
• ### Homework

• No homework, but please make a note that there will be an End of Topic Test on this stuff on Wednesday 6th May.
• ## More I-V curves: diode

• ### Classwork

• We made more notes on the I-V curves for bulbs and resistors (including for negative voltages).
• We investigated the I-V curve for a diode and made notes on this.
• You experimetned with thermistors.
• ## Circuits Recap

• ### Classwork

• We did a recap of what we have lerned so far in the topic, by writing and then answering each other's questions.
• ### Homework

• No homework.
• ## I-V Curves

• ### Classwork

• We collected voltage and current data for a bulb and a resistor.
• We plotted I-V graphs for these.
• ### Homework

• Bring to next lesson.
• ## Circuits - Key Formulae

• ### Classwork

• We made notes on the key formulae:
• V = IR
• I = Q/t
• V = E/Q
• We did Q3 on P167.
• ## Series Circuits

• ### Classwork

• We experimented with series circuits to find the rules for current and voltage in a series circuit.
• We also discussed resistance in a series circuit.
• ### Homework

• Answer Q1-2 on P167 and hand in on Monday morning.
• ## Electrical resistance

• ### Classwork

• We went through the HW and corrected our Sankey diagrams.
• We started a new topic - electrical circuits.
• We made some notes on resistance, including the formula V = IR
• We did a practical activity to measaure the resistance of a light bulb.
• ## Efficiency

• ### Classwork

• We made some notes on efficiency and did some example calculations.
• We measured the energy input and useful energy output of a Lego winch system.
• ### Homework

• Answer Q1-3 on P157 and hand in on Monday morning.
• ## Payback, u-value, Sankey diagrams

• ### Classwork

• We went through the last part of the payback time task from the lesson before half term.
• We made some brief notes on u-vales.
• We discussed energy transfers in an electric fan and an electric hairdryer, and represented these with Sankey diagrams.
• ## Payback time

• ### Classwork

• We made some very brief notes about payback time (see textbook).
• We did this task - we will finish going through it after half term.
• ### Homework

• No homework.
• ## Home insulation

• ### Classwork

• We went through the test.
• We discussed double glazing and cavity wall insulation - more on this after half term.
• ## Test

• ### Classwork

• We did the test.
• ### Homework

• No homework.
• ## Vacuum flask, evaporative cooling

• ### Classwork

• We examined a vacuum flask, labelled a diagram of it, and explained why it is so good at reducing the rate of heat transfer to the surroundings.
• Watch this video if you missed the lesson.
• We made some notes on evaporative cooling. Watch this video if you missed the lesson. If you want to recap on energy transfer by vaporization and condensation then watch this video from 9:18.
• ## Energy transfer by design

• ### Classwork

• We looked at two items that are designed for high rates of heat transfer - radiators and heatsinks for computers.
• As I mentioned, CPU heatsinks look quite cool - have a look at these pictures.
• ### Homework

• Revise for a test next Friday on this stuff.
• ## More Convection

• ### Classwork

• We watched a demonstration of convection in water.
• We did Q1-2 on P139.
• ### Homework

• Watch the first half of this video (up to 5:30) and read P142-3.
• Make notes on these and bring your notes to next lesson.
• ## Convection

• ### Classwork

• We demonstrated that hot air rises using paper propellors balanced on pencils. A bit like this but made of paper and using a hand rather than a candle as the heat source.
• We made some notes on convection.
• ## Conduction - questions

• ### Classwork

• We answered Q1-2 on P137 and went though them together.
• ### Homework

• Take two ice cubes. Put one on the base of an upturned pan (do not heat the pan at any point - just use a pan straight out of the cupboard), and the other on a chopping board made of wood or plastic. Observe for 5 minutes.
• Optional extra: get a free time-lapse app for your phone and make a time-lapse video of the process. Prop your phone up so it doesn't move - if you hold it your video will be wobbly. Post it on Yammer so we can watch it next lesson. Credits for anyone who does this. Make sure you appear in the video at some point so I know you haven't just downloaded it from youTube!
• Watch this video which demonstrates convection and this video about lava lamps. There is no need to make notes on these, but be ready to answer questions about them next lesson (and bring any questions you have).
• ## Thermal Conduction

• ### Classwork

• We discussed some examples of uses of bimetallic strips from last lesson's homework.
• We watched a demonstration which compared how well different metals conducted heat.
• We made some notes on thermal conduction and heat transfer.
• ## Thermal expansion

• ### Classwork

• We did the ball and ring experiment and heated a bimetallic strip to investigate thermal expansion.
• ### Homework

• Research one use of bimetallic strips - minimum half a side of A4, maximum 1 side A4 (including pictures).
• Hand in before next lesson.
• ## Specific latent heat

• ### Classwork

• We went over specific latent heat of vaporization and fusion (see this video).
• We finished off the second half of this worksheet and went through almost all the answers together - I will try to go through the last few parts at the start of next lesson.
• If you want to read more about gold on astronaut visors then look here, although this page will make a lot more sense to you once you have learned about the electromagnetic spectrum.
• ### Homework

• This is entirely optional - get a timelapse app for your phone (there are plenty of good free ones for iPhone and Android) and make a time lapse video of clouds or the sun setting or the moon rising or anything you want. You could even post it on Yammer so we can watch it next lesson.

• ## Specific latent heat

• ### Classwork

• We made some notes on specific latent heat of vaporization and fusion - if you missed the lesson watch this video and see P.132-133 of the textbook.
• ### Homework

• Do Q1-3 of this worksheet and hand in on Monday morning.
• ## Measuring specific heat capacity

• ### Classwork

• We did a practical to measure the specific heat capacity of aluminium or brass.
• We evaluated the result and compared it to the true values, and tried to explain the variation between the measured and the true values.
• ## Specific heat capacity

• ### Classwork

• We corrected the cover work and started the questions on P129.
• ### Homework

• Do Q1-2 on P129 and hand in on Monday.
• ## Cover lesson

• ### Classwork

• Please read P130-131. Answer Q2 on page 131 - you will need graph paper for this.
• Complete both sides of the "Specific Heat Capacity" worksheet - I will post the answers online later for you to check if you like - please pay attention to detail with units. Energy should be in joules, and mass in kg.

• ## Heating and cooling curves

• ### Classwork

• We made notes and did examples of heating and cooling curves involving changes of state, and did a difficult example of a salt water heating curve.
• ### Homework

• Bring your notes to next lesson.
• ## States of Matter

• ### Classwork

• We went through last week's cover work and drew up a table of the behaviour of particles in solids, liquids and gases.
• We collected some data and plotted a heating curve of water being heated from room temperature to boiling. Half the class used tap water and half used salt water.
• Next lesson we will compare these graphs to your predictions made during the cover lesson.
• ## Newton's Third Law

• ### Classwork

• I gave you some test feedback, then we looked at Newton's Third Law.
• ### Homework

• Watch this video about Newton's Third Law. It shows you another misconception (like the Year 8 misconception about gravity) that many people hold.
• Search on YouTube and try to find another useful video about Newton's Third Law that helps you understand what we talked about this lesson. Be ready to share any good videos you find next lesson.
• ## Cover lesson

• ### Classwork

• I am not here today. Here's your work.
• 1. Go through your test on your own. Use your notes and textbook to correct as much as you can - use a different colour. Make sure you bring your test to next lesson - we will go through it then.
• 3. Imagine a beaker of water from the tap is heated strongly by a Bunsen burner for 10 minutes. Draw a graph with temperature on the y axis and time on the x axis to show how you think the temperature of the water will change over that time. Label your axes with important numbers.
• Bring all your cover work to next lesson.
• ## Test

• ### Classwork

• We did the test.
• ### Homework

• No homework.
• ## Topic Recap

• ### Classwork

• We did a revision quiz to test our understanding of the topic.
• ### Homework

• Revise for test on Friday.
• ## Newton's Laws

• ### Classwork

• We did the questions on this sheet.
• ### Homework

• Finish off the sheet from today, and watch the videos from last lesson if you missed the lesson.
• ## Newton's Second Law

• ### Classwork

• We introduced Newton's Second Law (F = ma). Watch this video and this video if you missed the lesson.
• We did a few calculations, then did a practical to measure the acceleration of a trolley when pulled by different forces.
• ## Topic Recap

• ### Classwork

• We did a quiz using questions tought up by the class.
• ### Homework

• Revise for end of topic test after half term.
• ## Scalars and Vectors

• ### Classwork

• We went through the material on scalars and vectors that you covered for homework.
• We finished off the parallelogram method worksheet from last lesson.
• We tried adding together three vectors in different orders, and found that the result was always the same.
• ## Parallelogram method

• ### Classwork

• We finished off the first page of the sheet from last lesson, and started the second page.
• ### Homework

• Watch and make notes on this video about scalars and vectors (it mentions momentum at the end - you haven't studied this yet so ignore it).
• Make sure your notes include the table of scalars and vectors in your notes.
• Bring your notes to next lesson.
• ## Parallelogram method

• ### Classwork

• We went over key ideas from the homework video about resultant forces.
• We started learning the parallelogram method for adding forces, and did the first page of this worksheet.
• ## Graphs of motion

• ### Classwork

• I explained why significant figures are important in physics, and why we don't normally give answers as fractions or recurring decimals.
• We did Q1-2 on P11 - we still need to go through the last part of Q2 next lesson.
• ### Homework

• Watch and make notes on this video about resultant forces.