Creating pleasant musical sounds by vibrating the strings of musical instruments such as guitars and violins is the result of the type of instrument played as well as the mastery of the player. This article explains the physics of vibrating strings caused either by a bow drawn over them or by being plucked, and provides a simple analysis to…

The formation of waves as used for surfing close to the shore is described and explained, and linked to other wave topics that are covered in school science. Of course, there are differences because the wave activity is influenced by many factors, such as the weather and the shape of the shoreline, which make the wave patterns much more…

Teaching through discrepant event activities increases student interest in science. In this article, I will introduce a well-known 19th century demonstration, the Tissandier experiment, to stimulate curiosity among students learning the concept of inertia. In this demonstration, a hard object (e.g. a wooden rod) placed on fragile supports is…

O•, O[subscript 2] and O[subscript 3] play vital roles in the Earth's atmosphere, regulating ultraviolet radiation from the Sun and being essential for life. However, the oxygen family, O•, O[subscript 2] and O[subscript 3], also provides a source of the HO radical, the atmospheric detergent that removes pollutants from the atmosphere. This…

How heavy is your pet "Tyrannosaurus rex"? Accurately ascertaining the mass of a large carnivorous dinosaur is a challenging task for most students. Here, a simple method using model dinosaurs and some straightforward mathematics is provided. This is considerably more practical and safer than weighing the living dinosaur itself.

Many proteins use transition metals, exploiting their properties to achieve particular metabolic effects. Some of these functions are well known, such as the use of iron and copper in oxygen redox chemistry, molybdenum in nitrogen reduction and zinc in the nucleophilic activation of water. I review these examples alongside some lesser-known…

The third edition of the ASE's "Teaching Secondary Biology" sets out a vision for teaching and learning biology. Learning biology is not about learning the contents of a textbook. It is about conceptual learning, learning what it means to do biology and learning what it means to be a biologist. Our hope is that "Teaching Secondary…

Society at large often incorrectly thinks that the word 'chemicals' implies danger, when of course all matter can be described as a chemical. In this article we define what precisely we mean by 'hazard', risk' and 'danger'; we then consider selected elements from the periodic table that are noteworthy because of their dangerous characteristics.

Genetics forms a major part of A-level biology specifications in the UK for 16- to 18-yearolds. Research has identified several reasons why learning genetics is hard. However, research has not investigated whether examiner reports are useful for identifying difficult genetics concepts for students. This research explored the extent to which…

Earthbound manifestations of gravity in falling objects are distorted by the large mass and size of the Earth. Movement is also affected by air resistance. This article questions whether an approach based on everyday observations is necessarily the best starting point for introducing the idea of Newtonian gravity. Instead, a theoretical approach…

Science and technology play an important role in modern medicine and experience shows that, although school students and their relatives are likely to have experienced some of the complex procedures available today, they are generally not aware of the science behind them. Demonstrations that link school science to medical procedures can therefore…

Seaweed is rich in iodine, an essential component for the formation of thyroid hormones. Iodine deficiency is still a problem in the 21st century despite iodination programmes. Without sufficient iodine in the diet, we risk a decline in brain development and growth in fetuses and children. This key micronutrient is essential for the formation for…

We often say food and fuels "contain" energy. It is more accurate to say that energy is stored in the "fuel-oxygen system" generated during photosynthesis. It is definitely "not" stored in fuels or food (except for the very small amount of energy that can be obtained during anaerobic respiration). Aerobic respiration…

The "Evolving 5-19 Biology" report (RSB, 2021) presents eight key recommendations and a framework for the development of biology curricula for ages 5-19. The framework proposes organising the curriculum in 23 coherent themes that form learning progression pathways. These pathways build answers to seven 'big questions' related to big…

Nitrogen gas dominates the Earth's atmosphere but is largely ignored. Molecular nitrogen is extremely stable and so nitrogen is termed inert. What would happen if another 'inert' gas were the dominant species instead of molecular nitrogen? Here we show how unique nitrogen is and how important it has been to life on planet Earth.