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Natural sciences term 2 grade 8 questions with answers

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Natural sciences term 2 grade 8 questions with answers Matter - Answer Anything that has mass and takes up space Atom - Answer Smaller particle of matter Non-matter - Answer Anything that has no mass and does not occupy space Give an example of non matter - Answer Energy What is a chemical change? - Answer When 2 or more elements or compounds interact and the properties of the molecules change. New substances are formed but this is irreversible! Reactants - Answer Substances that combine in a chemical reaction Products - Answer Substances that are formed after a chemical reaction has taken place E.g. sodium + chlorine= sodium chloride What is a physical change? - Answer Particles in a compound change their arrangement but can be reversed. No new substances are formed Example of physical change - Answer Heating ice to liquid water, substance still WATER so no substances formed Proton - Answer -positive charge -larger/ heavier than electrons -located in nucleus of atom Neutron - Answer -neutral - no electrical charge

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