Study guides

The global climate was different in the past and continues to change due to natural causes

Pearson Edexcel·GCSE

Pearson-GCSE-Geography

Dive deep into Earth's dramatic history to uncover how natural forces—from wobbling orbits to massive volcanic eruptions—have driven climate change for millions of years. This guide gives you the precise knowledge, named examples, and examiner-approved techniques to secure top marks in your GCSE Geography exam.

The global economy

Pearson Edexcel·GCSE

Pearson-GCSE-Economics

The global economy is the interconnected system of international trade, finance, and production that shapes the modern world. Understanding it is crucial for explaining everything from the price of consumer goods to the impact of international organisations on national economies.

The Golden Age of Spain, 1474–1598

Pearson Edexcel·A-Level

Pearson-A-Level-History

This study covers the explosive growth of the Spanish Empire between 1474 and 1598, transforming a collection of Iberian kingdoms into the world's first truly global superpower. You will explore how military innovation, New World wealth, and strategic marriages created unprecedented dominance, while also examining the fatal financial and political flaws that ultimately undermined it.

The heart and blood vessels: arteries

AQA·GCSE

8464

The heart and blood vessels: capillaries.

AQA·GCSE

8464

The heart and blood vessels: Knowledge of the blood vessels associated with the heart is limited to the aorta, vena cava, pulmonary artery, pulmonary vein and coronary arteries. Knowledge of the names of the heart valves is not required.

AQA·GCSE

8464

The heart and blood vessels: Students should be able to explain how the structure of these vessels relates to their functions.

AQA·GCSE

8464

The heart and blood vessels: Students should be able to use simple compound measures such as rate and carry out rate calculations for blood flow.

AQA·GCSE

8464

The heart and blood vessels: Students should know the structure and functioning of the human heart and lungs, including how lungs are adapted for gaseous exchange.

AQA·GCSE

8464

The heart and blood vessels: The body contains three different types of blood vessel:

AQA·GCSE

8464

The heart and blood vessels: The heart is an organ that pumps blood around the body in a double circulatory system. The right ventricle pumps blood to the lungs where gas exchange takes place. The left ventricle pumps blood around the rest of the body.

AQA·GCSE

8464

The heart and blood vessels: The natural resting heart rate is controlled by a group of cells located in the right atrium that act as a pacemaker. Artificial pacemakers are electrical devices used to correct irregularities in the heart rate.

AQA·GCSE

8464

The heart and blood vessels: veins

AQA·GCSE

8464

The Hill Fort

Eduqas·GCSE

WJEC-GCSE-English-Literature

A quietly devastating exploration of grief, memory, and heritage. 'The Hill Fort' (Y Gaer) rewards careful study of its subtle structural shifts and its profound connection between the Welsh landscape and human emotion.

The History Boys

Eduqas·GCSE

WJEC-GCSE-English-Literature

Alan Bennett's The History Boys is a rich, provocative exploration of the true purpose of education, set against the backdrop of 1980s Thatcherite Britain. By contrasting the eccentric, humanistic Hector with the results-driven, pragmatic Irwin, the play challenges students to think critically about knowledge, truth, and how we measure success—making it a deeply rewarding text for literary analysis and an excellent vehicle for securing top marks in AO2 and AO3.

The human digestive system: Bile is made in the liver and stored in the gall bladder. It is alkaline to neutralise hydrochloric acid from the stomach. It also emulsifies fat to form small droplets which increases the surface area. The alkaline conditions and large surface area increase the rate of fat breakdown by lipase.

AQA·GCSE

8464

The human digestive system: Carbohydrases break down carbohydrates to simple sugars. Amylase is a carbohydrase which breaks down starch.

AQA·GCSE

8464

The human digestive system: Digestive enzymes convert food into small soluble molecules that can be absorbed into the bloodstream.

AQA·GCSE

8464

The human digestive system: Enzymes catalyse specific reactions in living organisms due to the shape of their active site.

AQA·GCSE

8464

The human digestive system: Lipases break down lipids (fats) to glycerol and fatty acids.

AQA·GCSE

8464

The human digestive system: Proteases break down proteins to amino acids.

AQA·GCSE

8464

The human digestive system: Required practical activity 3: use qualitative reagents to test for a range of carbohydrates, lipids and proteins.

AQA·GCSE

8464

The human digestive system: Required practical activity 4: investigate the effect of pH on the rate of reaction of amylase enzyme.

AQA·GCSE

8464

The human digestive system: Students should be able to carry out rate calculations for chemical reactions.

AQA·GCSE

8464

The human digestive system: Students should be able to describe the nature of enzyme molecules and relate their activity to temperature and pH changes.

AQA·GCSE

8464

The human digestive system: Students should be able to recall the sites of production and the action of amylase, proteases and lipases.

AQA·GCSE

8464

The human digestive system: Students should be able to relate knowledge of enzymes to Metabolism (page 42).

AQA·GCSE

8464

The human digestive system: Students should be able to understand simple word equations but no chemical symbol equations are required.

AQA·GCSE

8464

The human digestive system: Students should be able to use the ‘lock and key theory’ as a simplified model to explain enzyme action.

AQA·GCSE

8464

The human digestive system: Students should use a continuous sampling technique to determine the time taken to completely digest a starch solution at a range of pH values. Iodine reagent is to be used to test for starch every 30 seconds. Temperature must be controlled by use of a water bath or electric heater.

AQA·GCSE

8464