Evidence of Chemical Reactions Temperature Change Heat is absorbed by the substances causing the temperature to decrease Heat is released by the substances.

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Presentation transcript:

Evidence of Chemical Reactions Temperature Change Heat is absorbed by the substances causing the temperature to decrease Heat is released by the substances causing the temperature to increase SMOKE

Evidence of Chemical Reactions Fizzing When a gas is formed it may try to escape causing bubbles

Evidence of Chemical Reactions Color Change This is evidence of a chemical reaction only when the other properties have also changed. Chemical Change Not a Chemical Change

Evidence of Chemical Reactions Precipitate Formed Precipitate is a solid substance formed when liquids are combined

Evidence of Chemical Reactions Light When a new substance is formed light energy can be produced.

COMPOUNDS ELEMENTS ON PAGE 12 or 13 IN YOUR NOTEBOOK, MAKE A DOUBLE-BUBBLE MAP TO COMPARE COMPOUNDS AND ELEMENTS