This activity involves students completing a simple activity to investigate the activity of the enzyme catalase (from yeast) on the decomposition of different concentrations of hydrogen peroxide. Based on ‘Elephant’s Toothpaste’. The activity procedure is outlined and is followed by lots of relevant GCSE Exam questions from AQA, Edexcel and OCR across the GCSE Biology, Chemistry and Combined Science topics of enzyme activity and rate of reaction.

IGCSE Science Content based on the Oxford (AQA) specification. This is also compatible with the Cambridge specification. Contains Biology unit, Organisation. Chemistry unit, Atomic Structure & the Periodic Table. Physics unit, Forces & their Effects. Summarised notes for these units together with Oxford & Cambridge exam questions and answers. A great IGCSE Science study/revision/exam practise aide. (http://www.combiclassroom.co.uk)

A resource booklet for AQA GCSE Chemistry revision of separating mixtures. Consists of content covering GCSE separating mixtures, AQA exam questions on separating mixtures and the exam question answers. The booklets are aimed at students attempting to achieve Grade 4 – 8 GCSE. Finding all you require in one place saves time and energy. This can be saved for your revision. Download the booklets, read, highlight, make notes, test yourself with real exam questions and check your answers with the mark schemes. Use all of this to self-assess if you require further support to aid your understanding.

This GCSE Chemistry/Combined Science revision/consolidation booklet contains content for the first topics of atomic structure, ions & isotopes. GCSE exam questions and answers from AQA, Edexcel & OCR. A great resource to ensure new GCSE students get a great start for their GCSE journey. (http://www.combiclassroom.co.uk)

A great way for students to start the school academic year and their GCSE Science Journey with this starter pack for the academic year 2021 - 2022. The pack contains a study planner for all those important deadlines and study plans, Exam Revision Booklets for the first topics of the first GCSE Modules and Revision Notes for these topics. If you like what you see the full Study Pack is available for free on .

A resource booklet for OCR GCSE Chemistry revision of Ionic Compounds. Consists of content covering GCSE ionic compounds, OCR exam questions on ionic compounds and the exam question answers. The booklets are aimed at students attempting to achieve Grade 4 – 8 GCSE. Finding all you require in one place saves time and energy. This can be saved for your revision. Download the booklets, read, highlight, make notes, test yourself with real exam questions and check your answers with the mark schemes. Use all of this to self-assess if you require further support to aid your understanding.

A resource booklet for Edexcel GCSE Chemistry revision of testing for ions. Consists of content covering GCSE testing for ions, Edexcel exam questions on testing for ions and the exam question answers. The booklets are aimed at students attempting to achieve Grade 4 – 8 GCSE. Finding all you require in one place saves time and energy. This can be saved for your revision. Download the booklets, read, highlight, make notes, test yourself with real exam questions and check your answers with the mark schemes. Use all of this to self-assess if you require further support to aid your understanding.