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science assessment

notes for rates of reactions

TermDefinition
exothermic reaction -more energy is realised than supplied -heat rise in temperature -reactants = products + energy
endothermic reaction -more energy supplies than realised -drop in temperature, feels cold -reactants + engery = products
how to tell its a chemical reaction -heat changes -light is given out -sound given off -bubbles forming -colour change
whats in a risk assessment risk, hazard, precautions what is the risk, how is it a risk, how to prevent it
how to tell its a valid test similar and constant by three trials valid test will only change independent variable all variables are controlled
rules of writing an aim in an experiment to investigate how the IV changes the DV
describing a trend as the x increases/decreased, the y will increase/decrease
Created by: bridget dem
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