Mechanisms of ventilation and gaseous exchange in fish and insects

Mechanisms of ventilation and gaseous exchange in fish and insects

A series of approaches to cover these re-introduced topics in the new AS-level Biology A course. It looks at: 1. understanding key terms and how a unidirectional flow of water is maintained over the gills. 2. explaining why a countercurrent flow is more efficient at exchanging oxygen in fish than a concurrent flow. 3. suggests dissection activities to examine the gas exchange system of a bony fish and/or insect trachea. 4. the ventilation system in insects explaining how they are adapted for efficient gas exchange.
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Bear Island - the jelly bear evolution game

Bear Island - the jelly bear evolution game

This A-level Biology game is designed to help students to explore the following concepts: • polymorphism, in this case variation in a phenotypic feature (bear colour) • action of selection pressures • adaptation of populations through natural selection • genetic drift through chance occurrences • variation in the environment leading to balanced polymorphism and possibly allopatric speciation The game should be played as an exercise in reinforcement and expansion of understanding of these concepts after the basic content of evolution by natural selection has been introduced. This could be used as part of the AS course for Biology A or B and in support of the A-level.
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KS4 Biology DNA modelling activity

KS4 Biology DNA modelling activity

This resources supports teaching DNA with a modelling activity. It is aimed at supporting students to: • Describe DNA as a polymer that is made up of two strands forming a double helix. • Recall that DNA is made from four different nucleotides; each nucleotide consisting of a common sugar and phosphate group. It contains two tasks and guidance for teachers and a worksheet for students.
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KS4 Chemistry and Physics Superheroes of the atomic model activity

KS4 Chemistry and Physics Superheroes of the atomic model activity

This activity has been designed to support teaching the changes in the atomic model. This can be used for GCSE Chemistry but also overlaps with GCSE Physics. It can help students to: • construct a timeline for the atomic model. •state the scientists involved in the development of atomic model. •describe the contributions of each scientist in the development of the atomic model. •suggest whose contribution to the development of the atomic model was greatest. •explain the Gold foil experiment (higher tier only). • have the opportunity to apply their knowledge and understanding through a level of response question. This resource contains both teacher guidance and the accompanying worksheets.
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KS4 Physics Nuclear Fission Activity

KS4 Physics Nuclear Fission Activity

This resource has three fun activities that concentrate on helping GCSE students to: 1. Recall that some nuclei are unstable and may split into two nuclei this is called nuclear fission. 2. Explain how energy is released during nuclear fission in ionising radiation and in the kinetic energy of the resulting particles. 3. Explain how nuclear fission can lead to further fission events in a chain reaction. It contains notes for teachers and accompanying worksheets for the activities.
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Electric circuits KS4-KS5 transition guide

Electric circuits KS4-KS5 transition guide

This transition guide can be used at KS4 and KS5 to focus on how a particular topic is covered at the different key stages and provide information on: • Differences in the demand and approach at the different levels • Useful ways to think about the content at KS4 which will help prepare students for progression to KS5 • Common student misconceptions in this topic. This particular one focuses on electric circuits and relating it to concepts relating to electromagnetism at KS5. It contains checkpoint tasks, teaching activities and useful links.
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