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Phys and chem change

Physical and chemical changes. year 8 yearly

QuestionAnswer
Can physical changes be reversed? yes
Are the chemical bonds broken in a physical reaction? no
Give two examples of physical changes. changes of state and dissolving substances
What happens when chemical bonds are broken? the atoms are rearranged.
Give 5 things that can show a chemical reaction/change. New substance, solid appears or disappears, temperature changes, colour changes, bubbles appear, light is produced.
What makes corrosion occur when metal is deteriorated by water.
what is galvanizing? when a layer of zinc is put onto metal to stop corrosion
Created by: emmadixon
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