Today year 11 looked at the waves that are shorter than visible light, which are:

• ultra violet (UV)
• x-rays
• gamma rays

All these waves are harmful, with gamma being the most dangerous.

We looked at the uses of sun beds and security with ultra violet light (banknotes and driving licences), looking inside the body and checking for guns and knives at airports with x- rays, and nuclear power and bombs for gamma rays.

Some slides on this topic can be viewed here

7WD found out why hydrogen is not used in airships when we exploded a balloon containing hydrogen gas in class.

Students then did an experiment where they tried to collect hydrogen and do their own mini explosion. Most, but not all, groups got the experiment to work.

Members of 7WD are welcome to post a comment about what they did or observed in class today.

Some information and questions about the lesson can be downloaded here

 If you would like to download some specimen questions then follow the first link for foundation and the second for higher.

http://www.ocr.org.uk/Data/publications/specimen_assessment_materials/cquartetOCRTempFileu8jxg3YRjA.pdf

http://www.ocr.org.uk/Data/publications/specimen_assessment_materials/cquartetOCRTempFileAv971LlQem.pdf

Today is the last of the lesson time we will have to complete unit 1. All remaining work now needs to be handed in ASAP.

We are going to start unit 2 next week. This is the unit that there will be an exam for in January.

If anyone would like to download the OCR specification then follow the link below . Unit 2 (science for the needs of society) starts on page 57.

http://www.ocr.org.uk/Data/publications/specifications_syllabuses_and_tutors_handbooks/cquartetOCRTempFile8n2r2ysQIH.pdf