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Chemistry (Chemical Changes (` (Iron rusting, Burning wood, Fireworks…
Chemistry
Endothermic Reactions
Energy breaking bonds
Reactants + Energy ---> Product
EXAMPLES
Cooking eggs
Melting solid salts
Chemical Changes
Not easily reversible
Substances change
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Iron rusting
Burning wood
Fireworks exploding
Milk gone sour
Baking a cake
Physical Changes
Changes are reversible
Properties change
Includes changes in states of matter
Substances remain unchanged
Exothermic Reactions
More energy released
Reactants ---> Products + Energy
EXAMPLES
Crystallizing liquid salt
Nuclear fission
