Energy balance explores the relationship between food intake and physical activity, focusing on how individuals maintain a healthy body weight throughout life. It covers the calculation of energy requirements, the sources of energy in the diet, and the factors influencing these needs.
Technological developments in food production and health have revolutionised the way we grow, process, and consume food. From precision agriculture using GPS and drones to monitor crop health, to genetic modification (GM) that enhances yield and nutritional content, technology addresses challenges like food security, sustainability, and health. For example, hydroponics and vertical farming allow crops to be grown in controlled environments with minimal water and land use, reducing the carbon footprint of food transport. These innovations are crucial as the global population grows and climate change threatens traditional farming.
In food processing, technologies such as high-pressure processing (HPP) and pulsed electric fields (PEF) preserve food without heat, retaining more nutrients and flavour while extending shelf life. This reduces food waste and improves food safety. Additionally, developments in packaging—like modified atmosphere packaging (MAP) and active packaging—help maintain freshness and reduce spoilage. Understanding these technologies is essential for students to evaluate their benefits and drawbacks, such as cost, consumer acceptance, and ethical concerns around GM foods.
This topic fits into the wider subject by linking food science, nutrition, and sustainability. It prepares students to make informed choices as consumers and future food professionals. By examining real-world examples, students learn how technology can address issues like malnutrition, obesity, and food deserts. Mastery of this content is vital for exam questions that ask for evaluation of technological impacts on health and food production.
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