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A change in volume occurs

Bubbles of gas appear

Change in density causes the mixture to expand or contract

Bubbles of gas appear when you drop mentos into a bottle of diet soda.

A change in smell or

taste occurs

10 signs of chemical change

A change in any distinctive chemical or physical property occurs

When a sandwich or food is left out for too long without being consumed, a chemical reaction occurs and the food becomes rotten.

Combustion is a type of chemical reaction that you can see everytime you strike a match.

A color change occurs

Leaves changing colors from summer to fall is a form of chemical change.

The temperature changes

More bond-making than bond breaking causes the area to become warmer. More bond breaking than bond-making causes the area to become cooler.

By: Natalie T & Courtney S

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A change in melting point or boiling point occurs

A change in electrical conductivity occurs

When compostion changes the boiling point and melting point does too.

the corrosion of metals when mixed with salt, effects the electricity that is able to go through it.

A precipitate forms

Precipitate forms when reactants in a soultion create a solid that falls.

Light is emitted

Fireworks is a chemical reaction because once they react with the spark they can not return to their original form.

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