May 2015 archive

DP Chem Topic review and exam preparation

Here is a document to put your review sheets on. The review sheets can be produced electronically or on paper and then scanned. Make sure to make them public before you share them, so others can download.

Wednesday you will get some practice questions for the topics, and then a practice exam.

My suggestion: Review topic first, then try some questions, then revise again, until all topics are pretty good, then try the exam.  Then go back to any problem spots.

Review task from topics 1-5 (answers at the end)

Answers to the review exam given out in class for

SL paper one, SL paper two,

HL paper one HL paper two


Grade 9 – Light, sound and waves

For our final unit you will be investigating waves in a series of activities and experiments. You will complete one experiment for Criterion C.

There is a final exhibition in the second week of June, and you will contribute to this on an area of sight or hearing. The reflection on your learning will be your final criterion D task.

Here is a unit overview.


Waves in general: 

Wave activity with simulation on Phet

Wave properties practice problems

Read about Waves on BBC bitesize

Solutions to wave properties practice


Reading about sound (and be able to answer questions on p 103 and 107)

How to measure speed of sound in two ways – one outside and one with a tube and cylinder

Free software to find frequency of sounds (use audioxplorer) and helpsheet about it

Problem to solve using speed of sound, and some more problems and the answers



See the text book pg 86-7 for reflection in mirrors, 88-9 for refraction and 90-1 for internal reflection.

1 – Tracing rays through a block using pins – complete the sheet and then take two similar measurements with a block and pins.

2 – Refraction and a coin in water – students should complete the sheet then set up the investigation described

3 – Refraction and a displaced ray. Complete the sheet and then collect three measurements using a ray box and analyse.

4- Angles in a simulated lab – open the PheT simulation. Use the simulation to see what happens in the following situations

i – the refractive index of the top material is less than the bottom one (i.e. air on the top and water on the bottom)

ii – the refractive index of the top material is greater than the bottom one (i.e. water on the top and air on the bottom)

iii – the refractive indexes of the materials are the same