Enzymes Quiz
Enzymes are proteins that catalyse biochemical reactions. This means that they increase the speed of these reactions without being consumed themselves.
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GCSE Science learning topics and material for students in Year 7 to Year 11.
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Osmosis Quiz
The osmosis process involves the movement of water molecules across a partially permeable membrane from a region of high water concentration to a region of low concentration.
Exercise & Health Quiz
Exercise is an important part of a healthy lifestyle. It helps to maintain a healthy weight, boosts energy levels, and reduces the risk of diseases such as heart disease.
Chromosomes Quiz
Chromosomes carry genetic information in a molecule called DNA. A type of cell division called mitosis ensures process happens.
Microscopy Quiz
Microscopy is the objects, such study of very small as cells in science, using an instrument called a microscope.
How to tackle chemistry calculations In GCSE exam papers
Water and sodium hydroxide are both compounds. If you look at the Periodic table, you will see that sodium has a mass number of 23, oxygen has a mass number of 16 and hydrogen has a mass number of 1.