Science IB Level

An outline of the basic chemical process of electrolysis, including electron flow through the entire system.

An outline of the process of translating DNA bases into a protein, via an mRNA codon:tRNA anti-codon mechanism forming a polypeptide chain.

An outline of three ways electric charge can be moved between objects, including mention of how non-conducting objects can become charged.

A guide to understanding and applying the conservation of momentum, during collisions when the motion of the colliding bodies is not restricted to one dimension.

An outline of the basic principle of conservation of angular momentum, illustrating the inverse relationship between angular velocity and moment of inertia, with real-world examples.

A visual explanation of the factors which affect the rate of thermal energy transfer by conduction.

An outline of the energy balance model of the Earth-atmosphere system, including how to calculate the effect of greenhouse gases, and the atmosphere, on Earth’s average temperature.

An outline of natural frequencies, driving frequencies, the nature of resonance, and damping forces, with real-world examples.

A visual explanation of the Doppler Effect as it applies to sound waves.

A visual explanation of the path of charged particles in a uniform magnetic field, according to their charge and their angle of entry into the magnetic field. Includes how to calculate the radius of the particle’s path.

A visual outline of the Compton Effect experiment, in which photons are scattered by electrons they hit. Includes context on what evidence this provides regarding the wave or particle nature of light.

An explanation of how the stellar parallax method can be used to calculate distances to stars, including the limitations of this method.

An outline of mitosis and meiosis forms of cell division: comparing the similarities and differences between them, and outlining their function in organisms.

A visual outline of how Cas9-CRISPR is applied in human cells to edit DNA.

An outline of the human response to infection, giving an overview of the adaptive immune response which includes B and T cells, antibody production and vaccination.

An in-depth outline of photosynthesis, including light-dependent and light-independent reactions, how it is powered by excited electrons and ATP, and processes such as photolysis, chemiosmosis and the Calvin Cycle.

The structure of skeletal muscles and a detailed look at the sliding filament mechanism of muscle contraction.

A detailed look at how haemoglobin transports oxygen with analysis of the oxygen dissociation curve.

A visual outline of the core process of evolution by natural selection, emphasising that adaptation takes place over generations, from heritable variation.

An outline of the lytic and lysogenic cycles, using bacterial cells and the viruses which infect them as a visual example. Additional reference to the Herpes simplex virus as an animal example.

A visual explanation of how the hydrogen emission spectrum provides evidence for the arrangement of electrons in discrete energy levels in atoms.

An outline of how both SN1 and SN2 types of nucleophilic substitution reaction occur, including covering the nature of electrophiles and nucleophiles.

An outline of free radical substitution reactions - including what free radicals are, how they are created, and propagation and termination steps to these reactions.

An outline of how chromatography is used to separate the components of a substance based on each component’s intermolecular interactions with the materials it is moving through. Includes guidance on how to calculate each substance’s signature retardation factor.