6th Grade Science / Lesson 10 - Chemical Change
What will we be learning today?
What Happens to Mass in Chemical Changes?
Silver tarnishes, candles burn, toast browns, milk sours, battery acid eats away cloth. These are all chemical changes. In any chemical change, what happens to the amount of matter? For example, does mass decrease when a metal is mixed with vinegar? Scientists have long known that the mass of matter does not change during chemical changes. The total mass of all starting substances equals the total mass of all new substances in chemical changes. As long as all substances are measured, total mass does not decrease or increase when a metal is dissolved in vinegar, or a candle burns, or in any other chemical change. Let's Review What We Learned Today!