Conservation+of+Matter+or+Mass

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(Copy and Complete Figure 15 below) The idea of atoms explains the law of conservation of matter. For every molecule of methane that burns, two molecules of oxygen are used. the atoms are rearranged in the reaction, bu they do not disappear. End Figure ................................................................................................................................... Questions for the figure above 1. Matter is not created or destroyed in any chemical or physical change. So, the mass of the products always equals the mass of the reactants in chemical reactions.
 * __ Conserving Matter __**

CH4 + 2O2 à CO2 + 2H2O

2. The same atoms exist before and after a chemical reaction. The atoms don’t change in a chemical reaction, only the arrangement of the bonds between the atoms change.

3. In the reaction above the reactants are… In the reaction above the products are…

4. In the above reaction: There are …… oxygen atoms in the reactants. There are …… oxygen molecules in the reactants. There are …… hydrogen atoms in the products. The arrow indicates a …

5. …… is an example of a chemical formula.

6. The representation of the reaction above is called a …. ................................................................................................................................. Make a model showing the law of conservation of matter. Make the left side of a reaction and weigh it. Rearrange the atoms to make right side and weigh it.

Materials: About 12 inches of foil for making atoms. 9 toothpick halves for making bonds 9 tiny pieces of paper for labeling .............................................................................................................................. [|Matter Can't Be destroyed] https://www.youtube.com/watch?v=KKNStFnQGAI

Conservation Matter BBC Lavoisier

Conservation of Matter Kids

Cartoon Conservation of Matter

https://www.youtube.com/watch?v=IW7SUBw_aAA

https://www.youtube.com/watch?v=774TbEUUM-A

TED The law of conservation of mass - Todd Ramsey - Too Much https://www.youtube.com/watch?v=2S6e11NBwiw

Conservation of Matter
Copy and complete Text P71 1. Lavoisier accurately measured both… 2. Lavoisier’s data showed… 3. The law of conservation of matter states… 4. When methane burns, the mass of all the carbon dioxide and water equals the mass of the original