Understanding the Law of Conservation of Matter

The video explains the law of conservation of matter, stating that matter cannot be created or destroyed, only transformed. Antoine Lavoisier's experiments in the 1700s demonstrated this principle, showing that total mass remains constant during chemical reactions. The law applies to both physical and chemical changes, such as the breaking of a piggy bank or the evaporation of water. It is crucial for balancing chemical equations, as illustrated with examples like water formation and iron rusting. The video concludes by reinforcing the law's significance and encouraging kindness.

Who is credited with discovering the law of conservation of matter?

• Marie Curie

• Antoine Lavoisier

• Albert Einstein

• Isaac Newton

What happens to the mass of a piggy bank when it breaks?

• It decreases

• It doubles

• It increases

• It remains the same

During the evaporation of water, what happens to the molecules?

• They change into a different substance

• They move further apart

• They disappear

• They move closer together

Why do we balance chemical equations?

• To change the reactants

• To increase reaction speed

• To ensure mass is conserved

• To create new elements

In the formation of water, what are the reactants?

• CO2 and H2

• N2 and O2

• O2 and H2

• H2O

What is the result of iron rusting in terms of reactants and products?

• More products than reactants

• More reactants than products

• Same number of reactants and products

• Different number of reactants and products

What is the main idea of the law of conservation of matter?

• Matter can be transformed

• Matter can be destroyed

• Matter is always visible

• Matter can be created