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In this lesson we will determine the effects of increasing or decreasing numbers of organisms in a food web on other organisms.

In this lesson we will describe the inheritance pattern and causes of Huntington’s disease and cystic fibrosis.

In this lesson we will describe the inheritance pattern and causes of sickle cell anaemia.

In this lesson we will describe the inheritance pattern and causes of haemophilia.

In this lesson we will draw a particle model for a solution, make accurate measurements to test the conservation of mass theory, and explain the meaning of conservation of mass in terms of particles.

In this lesson we will define a pure substance and link this to melting and boiling points, define a mixture and then describe simple separation techniques.

In this lesson we will identify parts of a mixture to be separated, write a method for separating a mixture and name key pieces of equipment and processes for separation to be successful.

In this lesson we will explain how simple distillation works, identify hazards and risks and suggest how to reduce them, as well as identify the components of a Liebig condenser and give reasons for this being more suitable than simple distillation equipment.

In this lesson we will identify mixtures using chromatography and describe how to separate a mixture using chromatography Interpret chromatograms to describe the composition of mixtures.

In this lesson we will define a dihybrid cross and construct Punnett squares to predict the phenotypes and genotypes of offspring.

In this lesson we will revise constructing dihybrid cross Punnett squares and predicting offspring.