scia

Chemical change is caused by _.

_ are observed with the combination of the 5 evidences.

_ was the greatest discovery of all time.

_ stated when a material burns, it releases a substance known as _

_ contradicts this theory as he carefully observed in his experiment that instead of releasing a substance, the material being burned reacts with _.

3 factors present for burning to occur

_ shows the symbols or formulas of the reactants and products, the phases (solid, liquid, gas) of these substances, and the ratio of the substances as they react

A reactions when 2 or more reactants combine to form a single product.

A single reactant breaks down into simpler ones. This is the reverse of the combination reaction. A catalyst, which may be in a form of heat, electricity, radiation or even enzyme, can aid or bring about a decomposition reaction

One replacement takes another element from a compound. The more active element takes the place of the less active element in a compound.