WebEasy-to-understand homework and revision materials for your GCSE Combined Science Edexcel ‘9-1’ studies and exams. ... Rates of reaction and energy changes; ... WebIn 2015, 80 per cent of energy consumed in the world came from fossil fuels. In early 2024, the UK's dependence on fossil fuels was at a low of 77 per cent. Examples include: coal; natural gas; oil; Coal. Use of coal for electricity generation in the UK has fallen since 2012. This energy is created through the burning of coal, which is usually ...

GCSE Science & Maths

WebGCSE Combined Science Energy learning resources for adults, children, parents and teachers. davidraja krishnan

Explaining energy changes in reactions - Higher - Energy, rates …

WebEnergy changes can be represented using energy profiles. Catalysts (including enzymes) speed up chemical reactions. Energy changes can be calculated from bond energies. WebProvided inelastic deformation has not happened, the work done is equal to the elastic potential energy stored. The elastic potential energy stored can be calculated using the equation: elastic potential energy = 0.5 × spring constant × (extension) 2 \[E_e = \frac{1}{2}~k~x^2\] This is when: elastic potential energy (E e) is measured in ... WebEnergy generation and storage. Energy generation and storage have a huge global impact on our lives - from decisions about the use of fossil fuels and their effect on our environment, to the development of cleaner, more-modern ways to create and store energy. Part of. Design and Technology. bb dang